RESUMEN Objetivo. Determinar la asociación de la inseguridad alimentaria con factores sociodemográficos en una muestra de población de América Latina durante la pandemia de COVID-19. Métodos. Se llevó a cabo un estudio transversal multicéntrico en diez países de América Latina mediante una encuesta en línea a través de diversas plataformas digitales, entre el 14 de octubre del 2020 y el 15 de febrero del 2021. Se realizó un análisis estadístico de los datos usando procedimientos de estadística descriptiva, la prueba ji al cuadrado y un análisis de regresión logística. Resultados. En un total de 6 357 encuestas, el 58,2% de las personas encuestadas gozaba de seguridad alimentaria, el 29,3% tenía una inseguridad alimentaria leve, el 9,2% una inseguridad alimentaria moderada y el 3,3% una inseguridad alimentaria grave. Por lo que respecta a la asociación entre la inseguridad alimentaria y las variables sociodemográficas, hay una asociación significativa para algunas de las variables estudiadas, como la zona de residencia, el nivel de estudios, la actividad laboral, el número de personas en el hogar, el hogar con menores de 10 años y el nivel socioeconómico. Conclusiones. Estos resultados indican que los factores sociodemográficos asociados a la inseguridad alimentaria durante la pandemia de COVID-19 en América Latina fueron la residencia en zonas rurales; la educación primaria y secundaria completa o no; la actividad laboral (trabajo doméstico, personas desempleadas y trabajadores autónomos); el nivel socioeconómico bajo, medio bajo, y medio; el hogar con más de cuatro personas; y el hogar con menores de 10 años.

RESUMO Objetivo. Compreender a relação entre insegurança alimentar e fatores sociodemográficos em uma amostra populacional da América Latina durante a pandemia de COVID-19. Métodos. Estudo transversal multicêntrico realizado em 10 países da América Latina por meio de uma pesquisa on-line conduzida em diferentes plataformas digitais de 14 de outubro de 2020 a 15 de fevereiro de 2021. A análise estatística dos dados foi realizada por meio da aplicação de estatísticas descritivas, teste qui-quadrado e análise de regressão logística. Resultados. De um total de 6 357 questionários, 58,2% dos entrevistados afirmaram ter segurança alimentar, 29,3% indicaram um nível de insegurança alimentar leve, 9,2% tinham insegurança alimentar moderada e 3,3%, insegurança alimentar grave. No que diz respeito à relação entre insegurança alimentar e variáveis sociodemográficas, há uma relação significativa com as variáveis estudadas, incluindo área de residência, nível de escolaridade, ocupação, número de pessoas no domicílio, domicílio com crianças com menos de 10 anos de idade e nível socioeconômico. Conclusões. Os achados apontam que os fatores sociodemográficos associados à insegurança alimentar durante a pandemia de COVID-19 na América Latina foram residência em zona rural; ensino fundamental e médio completo e incompleto; ocupação (do lar, desempregado(a) e autônomo(a)); nível socioeconômico baixo, médio-baixo e médio; domicílio com mais de quatro pessoas; e domicílio com crianças menores de 10 anos de idade.

ABSTRACT Objective. To understand the association of food insecurity with sociodemographic factors in a sample population in Latin America during the COVID-19 pandemic. Methods. This was a multicenter cross-sectional study conducted in 10 countries in Latin America using an online survey through various digital platforms from October 14, 2020 to February 15, 2021. Statistical analysis of data was performed by applying descriptive statistics, chi-square test, and logistic regression analysis. Results. Of a total of 6 357 surveys, 58.2% of respondents experienced food security, 29.3% were slightly food insecure, 9.2% were moderately food insecure, and 3.3% were severely food insecure. Concerning the association food insecurity and sociodemographic variables, there is a significant association in the variables studied, including area of residence, education level, occupation, number of persons in the household, household with children younger than 10 years of age, and socioeconomic level. Conclusions. These findings indicate that sociodemographic factors associated with food insecurity during the COVID-19 pandemic in Latin America were rural residence; complete and incomplete basic and secondary schooling; occupation (homemaker, unemployed, and self-employed); low, medium-low, and medium socioeconomic level; household with more than four persons; and household with children younger than 10 years of age.

Resumen En el presente artículo se establece como objetivo analizar los determinantes del salario de reserva en los microempresarios en México. Se plantea el salario de reserva como aquel ingreso laboral que estarían dispuestos a aceptar los microempresarios para cerrar su negocio y percibir un salario fijo. Se utilizan los datos de la Encuesta Nacional sobre Productividad y Competitividad de las Micro, Pequeñas y Medianas Empresas y se utiliza un modelo de corte transversal. Los resultados sugieren que el ser hombre, la educación superior, contar con seguro social, la inversión y las utilidades elevan el salario de reserva. Por otro lado, variables como la antigüedad del negocio, el número de personas contratadas y la competencia, disminuyen el salario de reserva.

Abstract The objective of this article is to analyze the determinants of the reserve salary of micro entrepreneurs in Mexico. The reserve salary is considered to be the salary that micro entrepreneurs would be willing to accept to close their business and receive a fixed salary. Data from the National Survey on Productivity and Competitiveness of Micro, Small and Medium Enterprises are used and a cross-sectional model proposed. The results suggest that being a man, higher education, having social security, investment and profits raise the reserve salary, while variables such as the age of the business, number of employees and competition reduce it.

RESUMO O objetivo deste artigo é apresentar o caso de uma égua crioula colombiana de 15 anos com histórico de abortos e não obtenção de embrião, onde foi realizada avaliação do sistema genital externo e interno, ultrassonografia, citologia, cultura e biópsia endometrial realizados como métodos diagnósticos.; que relataram endometrite crônica de classificação II B, associada a edema tipo 4, estabelecendo prognóstico reservado para reprodução, após constatação de endometrite fúngica. O tratamento consistiu no uso de complexos vitaminicos, medicamentos biorreguladores, antifúngicos e antibióticos, nutracêuticos, minerais e lavagens intrauterinas. Após a medicação e três intervalos ovulatórios consecutivos, quatro embriões foram recuperados e transferidos com sucesso, dos quais três chegaram a termo, demonstrando assim a recuperação da função endometrial, graças à identificação dos microorganismos envolvidos e ao estabelecimento de terapia adequada. A endometrite é definida como a inflamação do endométrio, sendo considerada uma das principais causas de sub e infertilidade na égua, que geram perdas econômicas significativas, com incidência de 10 a 15 %. Existem diferentes etiologias, destacando-se a má conformação do perineo, útero abdominal, perda da atividade miometrial, número de montas, fatores moleculares e genéticos, além da presença de bactérias e fungos.

ABSTRACT The objective of this article is to present the case of a 15-year-old Colombian criollo mare with a history of abortions and no embryo obtaining, where the evaluation of the external and internal genital system, ultrasonography, cytology, culture and endometrial biopsy were performed as diagnostic methods; which reported chronic endometritis of classification II B, associated with type 4 edema, and establishing a reserved prognosis for reproduction, after verifying fungal endometritis. The treatment consisted of the use of vitamin complexes, bioregulatory medicine, antifungal and antibiotic therapy, nutraceuticals, minerals, and intrauterine washings. After the medication and three consecutive ovulatory intervals, four embryos were successfully recovered and transferred, of which three reached term, thus demonstrating the recovery of endometrial function, thanks to the identification of the microorganisms involved and the establishment of adequate therapy. And complemented. Endometritis is defined as inflammation of the endometrium, and is considered one of the main causes of sub and infertility in the mare, which generate significant economic losses, with an incidence of 10 to 15 %. There are different etiologies, highlighting the malconformation of the perineum, abdominal uterus, loss of myometrial activity, number of mounts, molecular and genetic factors, and the presence of bacteria and fungi.

RESUMEN El presente artículo tiene como objetivo presentar el caso de una yegua criolla colombiana de 15 años con historial de abortos y nula obtención de embriones, donde fueron realizados como métodos diagnósticos la evaluación del sistema genital externo e interno, ultrasonografia, citología, cultivo y biopsia endometrial; la cual reportó endometritis crónica de clasificación II B, asociada edema tipo 4, y estableciendo un pronóstico reservado para la reproducción, después de comprobarse la endometritis fúngica. El tratamiento consistió en la utilización de complejos vitamínicos, medicina biorreguladora, terapia antimicótica y antibiótica, nutraceúticos, minerales, y lavados intrauterinos. Posterior a la medicación y tres intervalos ovulatorios consecutivos, fueron recuperados y transferidos exitosamente cuatro embriones, de los cuales tres llegaron a término, demostrando así la recuperación de la función endometrial, gracias a la identificación de los microorganismos involucrados y el establecimiento de una terapia adecuada y complementada. La endometritis se define como la inflamación del endometrio, y es considerada una de las principales causas de sub e infertilidad en la yegua, que generan pérdidas económicas significativas, con una incidencia del 10 al 15 %. Existen diferentes etiologías, destacándose la mala conformación del perineo, útero abdominal, pérdida de la actividad miometrial, número de montas, factores moleculares y genéticos, y la presencia de bacterias y hongos.

Resumo O estudo analisa a elaboração de respostas para o enfrentamento da pandemia da COVID-19 na América Latina. Trata-se de um estudo descritivo com base em análise de documentos, dados e medidas políticas adotadas ou anunciadas entre março e dezembro de 2020 em 14 países latino-americanos. A análise compreendeu a apreciação de teor, conteúdo e abrangência das medidas políticas para contenção e mitigação sanitárias e para a reorganização dos serviços de saúde identificadas nos sites governamentais. Complementarmente, incluiu-se indicadores quantitativos demográficos e relativos à situação epidemiológica e resultado do Sringency index. No geral, as respostas dos países latino-americanos foram heterogêneas, apesar de multisetoriais, caracterizando a complexidade e diversidade decisória frente à pandemia. Conclui-se que ainda há muito a refletir sobre as consequências das fragilidades normativas para a consecução das necessidades multidimensionais durante crises sanitárias.

Abstract The study analyzes the development of responses to address the COVID-19 pandemic in Latin America. It is a descriptive study based on an analysis of documents, data, and policy measures adopted or announced between March and December 2020 in 14 Latin American countries. The analysis included assessment of the content, tenor, and scope of policy measures for containment and mitigation, health care, and reorganization of health services identified on government websites. In addition, quantitative demographic indicators were included, as well as those related to the epidemiological situation and the result of the Stringency index. In general, the responses of Latin American countries were heterogeneous, albeit multisectoral, characterizing the complexity and diversity of decision making when confronting a pandemic. The conclusion drawn is that there is still a great deal to reflect upon with respect to the consequences of regulatory weaknesses for the achievement of multidimensional demands during health crises.

Abstract The study analyzes the development of responses to address the COVID-19 pandemic in Latin America. It is a descriptive study based on an analysis of documents, data, and policy measures adopted or announced between March and December 2020 in 14 Latin American countries. The analysis included assessment of the content, tenor, and scope of policy measures for containment and mitigation, health care, and reorganization of health services identified on government websites. In addition, quantitative demographic indicators were included, as well as those related to the epidemiological situation and the result of the Stringency index. In general, the responses of Latin American countries were heterogeneous, albeit multisectoral, characterizing the complexity and diversity of decision making when confronting a pandemic. The conclusion drawn is that there is still a great deal to reflect upon with respect to the consequences of regulatory weaknesses for the achievement of multidimensional demands during health crises.

Resumo O estudo analisa a elaboração de respostas para o enfrentamento da pandemia da COVID-19 na América Latina. Trata-se de um estudo descritivo com base em análise de documentos, dados e medidas políticas adotadas ou anunciadas entre março e dezembro de 2020 em 14 países latino-americanos. A análise compreendeu a apreciação de teor, conteúdo e abrangência das medidas políticas para contenção e mitigação sanitárias e para a reorganização dos serviços de saúde identificadas nos sites governamentais. Complementarmente, incluiu-se indicadores quantitativos demográficos e relativos à situação epidemiológica e resultado do Sringency index. No geral, as respostas dos países latino-americanos foram heterogêneas, apesar de multisetoriais, caracterizando a complexidade e diversidade decisória frente à pandemia. Conclui-se que ainda há muito a refletir sobre as consequências das fragilidades normativas para a consecução das necessidades multidimensionais durante crises sanitárias.

Resumen. En los últimos años se ha reportado la incidencia de una nueva plaga en las plantaciones de pinabete (Abies guatemalensis), una biopelícula de microorganismos conocida como el “alga verde”. El objetivo de esta investigación fue identificar las algas y hongos que conforman la biopelícula que crece sobre las hojas del pinabete. Se recolectaron muestras de hojas en tres localidades con presencia de la biopelícula, y se aislaron las algas y hongos presentes en estas. Se realizó el cultivo in vitro de los microorganismos y se identificaron por medio de microscopía de luz, en el caso de los hongos, también se realizó una extracción de ADN y una amplificación de la región ITS. A partir de 120 hojas colectadas de 15 árboles se identificaron cuatro algas de los géneros Desmococcus, Klebsormidium y la clase Trebouxiophyceae, así como 11 hongos de los géneros Alternaria, Aspergillus, Fusarium, Mucor, Trichoderma y Ulocladium. La biopelícula que afecta a las plantaciones del pinabete en Guatemala está compuesta por varias especies de algas epifitas, hongos, las cuales pueden variar de acuerdo con la localidad. Aún es necesario abordar los factores que afectan la riqueza de microorganismos de la biopelícula y su relación simbiótica.

Abstract. In recent years, a new pest has been reported in Guatemalan fir (Abies guatemalensis) plantations, a biofilm of microorganisms known as “green algae”. The objective of this research was to identify the algae and fungi that make up the biofilm growing on Guatemalan fir leaves. Leaf samples were collected from three locations where the biofilm has been reported, and the algae and fungi present on the leaves were isolated. Microorganisms were cultured in vitro and identified by light microscopy; in the case of fungi, DNA extraction and amplification of the ITS region were also performed. Four algae of the genera Desmococcus, Klebsormidium and the class Trebouxiophyceae, and 11 fungi of the genera Alternaria, Aspergillus, Fusarium, Mucor, Trichoderma and Ulocladium were identified from 120 leaves of 15 trees. It was concluded that the biofilm affecting Guatemalan fir plantations in Guatemala is composed of several species of epiphytic algae and fungi, which may vary according to the locality. The factors affecting the richness of microorganisms in the biofilm and their symbiotic relationship still need to be addressed.

Resumen Introducción: el onicomatricoma es un tumor fibroepitelial originado en la matriz ungular, es infrecuente y suele presentarse alrededor de la quinta y sexta década de la vida. Métodos: se presenta el caso de un paciente masculino de 57 años, sin antecedentes patológicos, quien consultó por una lesión no dolorosa en la uña del tercer dedo de la mano derecha. Al examen físico presentaba cromoniquia amarilla longitudinal, estrías blanquecinas y hemorragias en astilla. Se realizó onicectomía y matricectomía proximal y se envió el especimen resecado a estudio histopatológico. Resultados: el examen histopatológico reportó una lesión fibroepitelial, con invaginaciones del epitelio y ausencia de la capa granulosa. En el estroma se observaban células ondulantes y fusocelulares acompañadas de mastocitos. Se realizaron tinciones de inmunohistoquímica, confirmando el diagnóstico de onicomatricoma, variante micropapilifera. Conclusiones: debido a los múltiples diagnósticos diferenciales de esta condición, es importante para el dermatólogo familiarizarse con la clínica, hallazgos dermatoscópicos y manejo de esta entidad.

Abstract Introduction: onychomatricoma is a fibroepithelial tumor originating in the nail matrix, it is infrequent and usually presents around the fifth and sixth decades of life. Methods: we present the case of a 57-year-old male patient, without relevant past medical history, who complained of a non-painful lesion in the nail of the third finger of the right hand. Physical exam revealed longitudinal yellow chromonychia, whitish striae, and splinter hemorrhages. Onychectomy and proximal matricectomy were performed and the resected specimen was sent for histopathological study. Results: the histopathological study reported a fibroepithelial lesion, with invaginations of the epithelium and absence of the granular layer. Undulating and spindle cell cells accompanied by mast cells were observed in the stroma. Immunohistochemical staining was performed, confirming the diagnosis of onychomatricoma, micropapiliferum variant. Conclusions: due to the multiple differential diagnoses of this condition, it´s important for the dermatologist to become familiar with the clinic, dermoscopic findings and management of this entity.

Resumen Introducción: en Colombia las Guías de Práctica Clínica para el manejo del paciente con diabetes tipo 1 (DM1) y tipo 2 (DM2) no mencionan el uso del monitoreo de glucosa flash dado que dicho sistema no estaba disponible. El objetivo del presente trabajo fue establecer un grupo de recomendaciones sobre el uso del monitoreo intermitente flash en Colombia. Métodos: el grupo de expertos estuvo conformado por ocho médicos colombianos expertos en el manejo de pacientes con DM1 y DM2 de diversas ciudades de Colombia, una enfermera licenciada educadora en diabetes, una paciente con diagnóstico de DM1 y un experto metodológico. A través de Zoom Enterprise versión de la aplicación de videoconferencia Zoom (Zoom Video Communications, San Jose, California) el grupo generó las preguntas con metodología Metaplan. Posteriormente, se realizó una búsqueda sistemática de la literatura y análisis de la evidencia. Las recomendaciones se generaron mediante grupo nominal según el grado de evidencia y la formaleza de la recomendación siguiendo la metodología GRADE. Resultados: se generaron recomendaciones clínicas enfocadas a: a) paciente con diagnóstico de DM1 e hipoglucemia; b) paciente con diagnóstico de DM1 y mal control metabólico, c) paciente con diagnóstico de DM tipo 2 tratado con insulina, d) diabetes pregestacional, e) calidad de vida y f) uso intrahospitalario. Conclusiones: las recomendaciones clínicas del presente consenso orientan la toma de decisiones clínicas con respecto al uso de monitoreo intermitente flash en el paciente con diagnóstico de diabetes en diferentes escenarios clínicos. (Acta Med Colomb 2022; 47. DOI:https://doi.org/10.36104/amc.2022.2239).

Abstract Introduction: in Colombia, the Clinical Practice Guidelines for the treatment of patients with type 1 (DM1) and type 2 (DM2) diabetes do not mention the use of flash glucose monitoring, as this system was not available. The objective of this study was to establish a set of recommendations for the use of intermittent flash monitoring in Colombia. Methods: the group of experts consisted of eight Colombian physicians from different cities within Colombia, with expertise in the management of patients with DM1 and DM2; a certified diabetes nurse educator; a patient with DM1; and a methodological expert. Using the Zoom Enterprise video conferencing application (Zoom Video Communications, San Jose, California), the group generated questions through the Metaplan method, then carried out a systematic literature search and evidence review. The recommendations were made according to the degree of evidence and strength of the recommendation, following the GRADE method. Results: clinical recommendations were made for: a) patients with DM1 and hypoglycemia; b) patients with DM1 and poor metabolic control; c) patients with insulin-treated DM2; d) pregestational diabetes; e) quality of life; and f) inpatient use. Conclusions: this consensus's clinical recommendations guide clinical decision making with regard to the use of intermittent flash monitoring in patients with diabetes in various clinical settings. (Acta Med Colomb 2022; 47. DOI:https://doi.org/10.36104/amc.2022.2239).

ABSTRACT Blastocystis sp. is a common intestinal microorganism. The α-L-fucosidase (ALFuc) is an enzyme long associated with the colonization of the gut microbiota. However, this enzyme has not been experimentally identified in Blastocystis cultures. The objective of the present study was to identify ALFuc in supernatants of axenic cultures of Blastocystis subtype (ST)1 ATCC-50177 and ATCC-50610 and to compare predicted ALFuc proteins of alfuc genes in sequenced STs1–3 isolates in human Blastocystis carriers. Excretion/secretion (Es/p) and cell lysate proteins were obtained by processing Blastocystis ATCC cultures and submitting them to SDS–PAGE and immunoblotting. In addition, 18 fecal samples from symptomatic Blastocystis human carriers were analyzed by sequencing of amplification products for subtyping. A complete identification of the alfuc gene and phylogenetic analysis were performed. Immunoblotting showed that the amplified band corresponding to ALFuc (~51 kDa) was recognized only in the ES/p. Furthermore, prediction analysis of ALFuc 3D structures revealed that the domain α-L-fucosidase and the GH29 family's catalytic sites were conserved; interestingly, the galactose-binding domain was recognized only in ST1 and ST2. The phylogenetic inferences of ALFuc showed that STs1–3 were clearly identifiable and grouped into specific clusters. Our results show, for the first time through experimental data that ALFuc is a secretion product of Blastocystis sp., which could have a relevant role during intestinal colonization; however, further studies are required to clarify this condition. Furthermore, the alfuc gene is a promising candidate for a phylogenetic marker, as it shows a conserved classification with the SSU-rDNA gene.

ABSTRACT Soil fauna is an essential component of the soil ecosystem for maintaining nutrient cycling and biological soil fertility. This study assessed the soil biodiversity (macrofauna, mesofauna, and microfauna) to define strategies for the sustainable management of tropical agricultural soils. The study was carried out in 200 agricultural production units in the Department of Sucre, in northern Colombia. Physicochemical properties (organic matter, nitrogen, phosphorus, and pH) were determined for each soil sample. The Berlesse-Tullgren method was used to determine the composition of macrofauna and mesofauna, while the sown surface plate counting method was applied for microfauna. Community biodiversity was quantified with diversity indices, and Pearson correlation was carried out to determine the relationships between soil fauna and soil quality indicators. For the macrofauna, 1330 individuals were found, distributed in 22 orders and 65 families; the families Tenebrionidae, Formicidae, Staphylinidae, Scarabaeidae and Julide presented the highest abundance and distribution. Mesofauna presented 1,171 individuals, distributed in the classes Arachnida with seven families and Collembola with four families; the Scheloribatidae, Isotomidae and Galumnidae families presented the highest abundance and distribution. The indices of richness, Shannon-Wiener diversity and Simpson dominance indicated that biodiversity was higher for macrofauna. Pearson’s correlation indicated significant correlations between soil mesofauna and soil organic matter (R2 = 0.87; p≤0.05) and phosphorous (R2 = 0.70; p≤0.05). The relationships between fauna and soil chemical properties indicate that soil biological diversity is sensitive to changes in the soil environment. This study revealed the importance of investigating the three components of soil fauna (macrofauna, mesofauna, and microfauna), since all three contribute to soil enrichment to grow nourished crops that allow plants to survive under climate change. Finally, this study may serve as a baseline to define strategies for sustainable management of tropical agricultural soils.

Resumen: El presente artículo pretende identificar la influencia del contexto transfronterizo en las aspiraciones educativas de los estudiantes de educación media superior que radican en Tijuana, Baja California. Para este objetivo se estiman modelos de regresión de respuesta cualitativa que consideran variables de índole demográfica y socioeducativa, del ámbito migratorio, y relacionadas con el empeño, la motivación propia y el apoyo familiar. Se utilizan datos recopilados por el Mexican Migration Field Research Program. Se encontró que las expectativas son poco sensibles a las circunstancias migratorias y transfronterizas. En cambio, el nivel educativo de los padres, la dedicación al estudio, tener familiares cercanos estudiando y saber inglés son variables que sí parecen relevantes en la formación de las expectativas. Se concluye que los aspectos demográficos y socioeducativos, así como la dedicación propia y el apoyo familiar, determinan en mayor medida las aspiraciones de los jóvenes.

Abstract: This article aims to shed light on the impact of the cross-border context on educational aspirations of middle and high school students living in Tijuana, Baja California. For this purpose, qualitative response regression models are estimated considering variables of a demographic and socio-educational nature, of the migratory field and related to commitment, self-motivation, and family support. Data was collected by the Mexican Migration Field Research Program is used. We found that expectations are not very sensitive to migratory and cross-border circumstances. On the other hand, the educational level of the parents, dedication to study, have family members at the university and speak English, does seem relevant in the formation of expectations. We concluded that demographic and socio-educational factors, as well as their own effort, and family support determine to a greater extent the aspirations of the youth.

Resumen Se propone un método basado en la distancia de Hellinger y la función de densidad de probabilidad de señales (Photo Response Non-Uniformity [PRNU]) para identificar el dispositivo de captura de imágenes digitales. El método asocia una imagen digital no modificada (imagen en disputa) con uno de un conjunto de dispositivos de captura candidatos, al comparar la huella digital insertada en la imagen en disputa contra la base de datos creada con las huellas digitales de los dispositivos de captura. El método propuesto se implementó en MatlabTM para demostrar su funcionamiento, luego se comparó en un caso de estudio controlado contra dos métodos diferentes: uno propuesto por Goljan et al. (2009) con un porcentaje de similitud promedio del 100% y el otro por Quintanar-Reséndiz et al. (2021) con el 99.35%, y para el método propuesto resultó ser de 97.68%.

Abstract A method based on Hellinger distance and Photo Response Non-Uniformity (PRNU) signal probability density function is proposed to identify the digital image capture device. The method is applied to an unmanipulated digital image (disputed image) and allows to associate it with one of a set of candidates capture devices. This association is performed through the fingerprint imprinted by the capturing device on the disputed image, then this imprinted fingerprint is compared with the fingerprint of each capturing device. The proposed method was implemented in MatlabTM to show its performance and compared against two different methods. The first method, proposed by Goljan et al. (2009), reached a mean similarity percentage of 100%, and the second method, proposed by Quintanar-Reséndiz et al. (2021), reached 99.35%; and the method proposed here reached a mean similarity percentage of 97.68%.

ABSTRACT Background: the inflammatory disease of the intestine defines like an inflammatory chronic affectation of the alimentary canal of unknown etiology that evolves of recurrent mode with sprouts and remissions and can present various complications and extra digestive manifestations. Objective: to describe the behavior of the inflammatory diseases of the intestine in Provincial Colon-proctology Service of the Teaching Hospital Manuel Ascunce Domenech. Methods: a descriptive cross-sectional study was carried out from April, 2016 to April, 2018. The universe of study was constituted for the 100 patients diagnosed by endoscopy’s studies and biopsy of inflammatory disease of the intestine in the aforementioned service. The investigation's primary source was given for a fill-out form designed by the authors. Results: the patients diagnosed of ulcerous colitis occupied the first place with a predominance of age diagnosis between 30-39 years old, almost half of the studied patients presented familiar background of intestinal inflammatory disease, the distal localization showed the most frequent for the ulcerative idiopathic colitis, while for Crohn the most frequent localization was perinea localization with just a case; the clinical intestinal manifestation more frequent corresponded to the diarrheas. Conclusions: the ulcerative colitis turned out to be more frequent than the disease of Crohn and then unspecified colitis with an age diagnosis between 30-39 years old; and with predominance of first-rate family record of the disease; in the ulcerative colitis prevailed the location distal and in the Crohn it was perineal being the diarrhea the most frequent symptom in both.

RESUMEN Fundamento: la enfermedad inflamatoria del intestino se define como una afectación inflamatoria crónica del tubo digestivo de causa desconocida que evoluciona de modo recurrente con brotes, remisiones que pueden presentar diversas complicaciones y manifestaciones extra digestivas. Objetivo: describir el comportamiento de las enfermedades inflamatorias del intestino en el Servicio Provincial de Coloproctología del Hospital Universitario Manuel Ascunce Domenech. Métodos: se realizó un estudio descriptivo y transversal, desde abril de 2016 hasta abril de 2018. El universo de estudio estuvo constituido por los 100 pacientes diagnosticados por estudios de endoscopía y biopsia de enfermedad inflamatoria del intestino en el servicio ya mencionado. La fuente primaria de la investigación estuvo dada por un formulario diseñado por los autores. Resultados: los pacientes diagnosticados de colitis ulcerosa ocuparon el primer lugar con predominio de la edad de diagnóstico entre 30-39 años; casi la mitad de los pacientes estudiados presentaron antecedentes familiares positivos de enfermedad inflamatoria intestinal, la localización distal fue la más frecuente para la colitis ulcerosa, mientras que para el Crohn solo fue la perineal reportado con un solo caso; las manifestaciones clínicas intestinales más frecuentes correspondieron a las diarreas. Conclusiones: la colitis ulcerativa resultó ser más frecuente que la enfermedad de Crohn y que la colitis inespecífica con la edad de diagnóstico entre 30-39 años, con predominio de antecedentes familiares de primer orden de la enfermedad, en la colitis ulcerosa prevaleció la localización distal y en el Crohn fue perineal donde la diarrea fue el síntoma más frecuente en ambas.

Resumen El estudio de las especies exóticas en Colombia ha sido un tema de interés en las últimas décadas debido a los efectos que estas pueden tener en la diversidad local. Los registros de especies exóticas de reptiles del género Hemidactylus se ha incrementado a partir de los datos disponibles en colecciones científicas y las observaciones en campo. Sin embargo, existen vacíos de información en torno a su distribución actual en el país y a su presencia inusual en ciertos entornos como producto de la acción humana. Se presenta una actualización de la distribución de tres geckos caseros, Hemidactylus frenatus, H. garnotii y H. mabouia, a partir de registros históricos y en varias localidades nuevas, así como el hallazgo atípico del lagarto nativo Gymnophthalmus speciosus en ecosistemas de páramo en los Andes centrales de Colombia, casi 2.000 m por encima del límite altitudinal conocido para la especie. Esta actualización de la distribución evidenció que H. frenatus se distribuye ampliamente en 30 de los 32 departamentos de Colombia, sin registros para Chocó y Guainía. Los registros actuales de H. garnotii son de la cuenca del río Cauca en los departamentos de Antioquia, Caldas y Risaralda, en tanto que H. mabouia, previamente conocida en el país por registros en la cuenca del Amazonas, actualmente también se ha encontrado en la región andina. Por último, se reporta la inusual presencia del lagarto nativo Gymnophthalmus speciosus en un ecosistema de páramo que no hace parte de su área de distribución, probablemente mediada por el transporte accidental desde una localidad típica de las tierras bajas (inferior a los 1.000 m sobre el nivel del mar).

Abstract The study of the introduction of exotic species in Colombia has been a trending topic in the last decade due to their effects on local diversity. The records of exotic reptile species of the genus Hemidactylus have increased based on museum vouchers and fieldwork. However, there are still plenty of information gaps regarding their current distribution in the country. Similarly, there is limited information on unusual reptile distributions caused by human transport inside the country. Here, we present an update to the distribution of the exotic house geckos Hemidactylus frenatus, H. garnotii, and H. mabouia based on several new localities and historical records. We also present an atypical record of the golden spectacled tegu Gymnophthalmus speciosus in paramo ecosystems from the Central Andes of Colombia, almost 2000 meters above the upper elevational known limit for this species. The distribution update shows that H. frenatus is widely distributed in 30 of the 32 departments of Colombia with no records for Chocó and Guainía. H. garnotii is currently known only from the Cauca River basin of the departments of Antioquia, Caldas, and Risaralda, while H. mabouia, previously known from the Amazon basin of the country, is now reported for the Andean region. Finally, Gymnophthalmus speciosus presence in a paramo ecosystem, considered unusual as it is not part of its distribution area, was probably the result of an accidental transport from a typical lowland locality (below 1000 meters above sea level.

Abstract Introduction: the COVID-19 pandemic has caused a reorganization of hospital and general surgery departments worldwide to assure the best medical and surgical treatment of patients with this disease and protection of the health-related personnel. Some of them will require surgical treatment either elective or urgent. Objective: report the initial experience in the management of patients with COVID-19 in a third level hospital. Material and Methods: a review of the surgical protocols, personal protection equipment used by the surgical teams, and results of the treatment of forty-two patients submitted to surgery. Results: During four months (April-July 2020) forty-two patients with suspicion or confirmed infection of SARS-CoV2 underwent surgical treatment. The most common surgery was tracheostomy in 16 patients (38%) followed by exploratory laparotomy in 8 patients (19%). The median postoperative stay was 17 days and the thirty-day postoperative mortality rate was 26%. Conclusions: reorganization of the general surgery department and the hospital, favors adequate management and treatment of patients with COVID-19 and protection to the health-related personnel. Due to the usual co-existence of comorbidities and pulmonary complications the postoperative mortality of these patients is high.

Resumen Antecedentes: La pandemia de COVID-19 ha ocasionado que los servicios de cirugía y de salud en todo el mundo tengan que reorganizarse y planear para poder brindar la mejor atención a los pacientes, con la protección necesaria para el personal de salud. Algunos de estos pacientes requerirán tratamiento quirúrgico, ya sea electivo o de urgencia. Objetivo: Reportar la experiencia inicial en el manejo de pacientes con COVID-19 que ameritaron tratamiento quirúrgico por los servicios de cirugía de un hospital de referencia. Método: Revisión de los protocolos quirúrgicos, equipo de protección personal usado por los equipos quirúrgicos y resultados del tratamiento de 42 pacientes sometidos a cirugía en un periodo de 4 meses. Resultados: Fueron intervenidos 42 pacientes con COVID-19. Treinta pacientes tenían diagnóstico de infección por SARS-CoV-2 y en 12 casos el diagnóstico fue clínico y por imagen. Las cirugías más frecuentes fueron traqueostomía en 16 pacientes (38%) y laparotomías exploradoras en 8 pacientes (19%). La mediana de estancia posoperatoria fue de 17 días y la mortalidad durante los primeros 30 días fue del 26%. Conclusiones: Es necesaria la reorganización de los departamentos quirúrgicos y del hospital para poder atender adecuadamente a los pacientes con COVID-19 y proteger al personal de salud. Los pacientes pueden presentan patologías que requieran tratamiento quirúrgico. Relacionado con la infección y la mayor frecuencia de comorbilidad, la mortalidad de estos pacientes es elevada.