Abstract The quality of the raw material for chocolate manufacture depends on the control of cacao seed fermentation. Practices affect the diversity and metabolic activities of spontaneous yeasts in fermentations. The control of the initial inoculum is important to standardize fermentations and to improve the final seed quality. We conducted fermentations using non-cleaned or cleaned fermentation boxes to evaluate the dynamics of the microorganism populations and their effect in seed composition in two consecutive years. The isolated yeasts were identified by sequencing the D1-domain of the 26S ribosomal genes. Pulp and cotyledon parameters were monitored during fermentations. Wickerhamomyces anomalus was the dominant yeast in the fermentations, but the species was less represented in cleaned boxes. In the cleaned-box fermentation, there was a delay in temperature rise of the fermentation, which retarded the suitable moment for seed-mass turning. The reduction in seed-pulp quality caused by restricted rainfall in one year limited the seed-mass heating and voided the seed turning. Thus, under substrate restriction, the initial reduced inoculum caused by cleaning the boxes impaired fermentation, mainly under environmental conditions that compromise the quality of the pulp. However, this variation had little effect on the desired degradation of cotyledon components, substrates for flavor precursors. noncleaned non years D1domain Ddomain D1 domain D S genes cleanedbox box seedmass mass turning seedpulp pulp Thus restriction However components precursors

Abstract In 2019 in Wuhan province, China, an outbreak of atypical pneumonia was reported with similar symptoms to Severe Acute Respiratory Syndrome (SARS), an outbreak reported in 2003, and Middle East Respiratory Syndrome (MERS) reported in Saudi Arabia in 2012. This emerging disease was caused by a novel coronavirus "Severe Acute Respiratory Syndrome Coronavirus 2" (SARS-CoV-2) or also called COVID-19. Which causes severe respiratory problems and various extrapulmonary manifestations. At the moment, the high mortality of COVID-19 has been related to the male sex, older adults (>60 years), and preexisting comorbidities of diabetes, obesity, hypertension, and heart problems. Diabetes is a disease characterized by insulin resistance and loss of β cell function in the pancreas, with an impaired immune system due to chronic inflammation. In patients with severe COVID-19 infection, altered secretion of pro-inflammatory cytokines has been observed, if this infection occurs in a diabetic patient who already has an inflammatory state per se, an exacerbated inflammation and multiorgan failure with fatal consequences can be triggered. Several authors hypothesis suggest that hyperglycemia increases the viral replication in patients “diabetic with COVID-19 infection" is necessary to keep adequate glycemic control. Treatments for COVID-19 had focused on decreasing symptoms, the use of antivirals, anti-inflammatory drugs, monoclonal antibodies and COVID-19 convalescent plasma has shown variable results. A vaccine is needed to control this viral infection, at the moment more than 150 candidates have been developed with efficiency ranges from 70 to 95%, however, the long-term immunity in vaccinated people is still unknown. This review focus on the characteristics of SARS-CoV-2 infection and the immune response in diabetic patients facing COVID-19.

Resumen En el año de 2019 en la provincia de Wuhan, China, se reportó un brote de neumonías atípicas, con síntomas similares a los del Síndrome Respiratorio Agudo Severo (SARS), brote reportado en el 2003, y al Síndrome Respiratorio del Oriente Medio (MERS), brote reportado en 2012 en Arabia Saudita. Esta enfermedad emergente fue causada por el nuevo coronavirus “Síndrome Respiratorio Agudo Severo Coronavirus 2” (SARS-CoV-2) o también denominada COVID-19 del inglés Coronavirus desease 2019, caracterizado por presentar severos problemas respiratorios y diversas manifestaciones extrapulmonares. Al momento se ha reportado una elevada tasa de mortalidad en individuos del sexo masculino, en adultos mayores de 60 años, y en personas con comorbilidades como diabetes obesidad, hipertensión y problemas cardiacos. La diabetes es una enfermedad caracterizada por resistencia a insulina, pérdida de función de células β en el páncreas, y desbalance del sistema inmune por el estado de inflamación crónica. En pacientes graves con COVID-19, se ha observado una secreción alterada de citocinas pro inflamatorias, si esto ocurre en un paciente diabético, que ya tiene un estado inflamatorio per se, se induce inflamación exacerbada y una falla multiorgánica que puede desencadenar en la muerte de los pacientes. Diversos autores señalan como hipótesis que la hiperglicemia favorece la replicación viral, por lo que en un paciente “diabético con infección COVID-19”, es primordial mantener un control glicémico adecuado. Los tratamientos para COVID-19 se han enfocado en disminuir los síntomas, el uso de antivirales, antiinflamatorios, anticuerpos monoclonales y plasma convaleciente COVID-19 ha mostrado resultados variables. Para el control de esta infección viral es necesaria una vacuna, al momento existen más de 150 candidatos, con una eficiencia que va del rango de 70 al 95%, pero aún falta determinar la inmunidad a largo plazo en las personas vacunadas. Esta revisión aborda las características de la infección por SARS-CoV-2 y la respuesta inmunitaria en pacientes diabéticos frente a COVID-19.

Abstract The objective of this work was to evaluate the effect of the Chrysactinia mexicana A. Gray essential oil, on C. glabrata clinical isolates. The essential oil was obtained by steam entrainment of flowers, leaves and secondary branches of C. mexicana. Gas chromatography and mass spectrometry were performed to determine the oil composition. Logarithmic and stationary phase microdilution assays were performed with Saccharomyces cerevisiae and clinical isolates of C. glabrata to determine the Minimum Inhibitory Concentration (MIC) of the oil. The cultures were incubated in liquid YPD medium, for 7 h in fresh medium (logarithmic phase) or 3 h in recovering medium (stationary phase), with the oil and microdilution tests were performed. The three main oil compounds identified were piperitone (29.57%), eucalyptol (26.86%) and α-terpineol (14.65%). The MICs obtained were, a) stationary phase: S. cerevisiae (BY4741) 2.78 mg/mL and C. glabrata (CBS138), (NY66) and (AN400) 6.50 mg/mL and (NY62) 9.29 mg/mL; b) logarithmic phase: S. cerevisiae (BY4741) 3.71 mg/mL and C. glabrata (CBS138) 4.64 mg/mL, (NY66) 6.5 mg/mL, (AN400) 8.36 mg/mL, and (NY62) 18.5 mg/mL. This work constitutes the first report of the fungicidal effect of the C. mexicana essential oil on human pathogenic fungi such as C. glabrata.

Resumen El objetivo fue evaluar el efecto del aceite esencial de Chrysactinia mexicana A. Gray en aislados clínicos de Candida glabrata. Se obtuvo aceite esencial por arrastre de vapor de las flores, hojas y ramas secundarias de C. mexicana. Se realizó cromatografía de gases y espectrometría de masas para conocer la composición del aceite. Se hicieron ensayos con aislados clínicos de C. glabrata y Saccharomyces cerevisiae (control), para determinar la Concentración Mínima Inhibitoria (CMI) del aceite. Los cultivos se incubaron en medio YPD líquido, 7 h en medio nuevo (fase logarítmica) o 3 h en medio recuperado de fase estacionaria (fase estacionaria) con el aceite y se realizaron ensayos de microdilución. Los principales tres compuestos del aceite fueron la piperitona (29.57%), eucaliptol (26.86%) y α-terpineol (14.65%). Las CMIs obtenidas fueron, a) fase estacionaria: S. cerevisiae (BY4741) 2.78 mg/mL y C. glabrata (CBS138), (NY66) y (AN400) 6.50 mg/mL y (NY62) 9.29 mg/mL; b) fase logarítmica: S. cerevisiae (BY4741) 3.71 mg/mL y C. glabrata (CBS138) 4.64 mg/mL, (NY66) 6.5 mg/mL, (AN400) 8.36 mg/mL, y (NY62) 18.5 mg/mL. Este trabajo constituye el primer reporte del efecto fungicida del aceite esencial de C. mexicana sobre hongos patógenos del humano como C. glabrata.

Abstract This work describes the synthesis of composites steatite/flexible polyurethane by replacing 4.5 wt. % of polyol with steatite rock powder. We evaluated two mechanical properties of composites (comfort factor and support factor) for various formulations based on a fractional factorial design. The new synthesized composites showed higher support factor, greater comfort factor, and lower cost, compared to conventional flexible polyurethane foams. There is not a significant change in the chemical composition of the foams, due to substitution of 4.5 wt. % polyol by steatite. However, there was a decrease in cell size and greater interaction between the hard segments of the composite.

Abstract: In order to isolate and identify mycoparasites of Hemileia vastatrix and to know their potential as a biological control for Coffee Leaf Rust, from December 2014 to January 2015, samples of Arabica coffee with pustules and the presence of possible mycoparasites were sampled. The fungi associated with the pustules were isolated and identified morphometrically at the genus level. The percentage of mycoparasitism in vitro of three of the isolates on rust pustules was evaluated. We obtained 23 isolates of microorganisms associated with rust pustules: Lecanicillium spp. (7), Calcarisporium sp. (4), Sporothrix sp. (4) and Simplicillium spp. (8). All the isolates evaluated showed mycoparasitism in rust uredospores; however, 120 h after inoculation, the highest percentages (P = 0.05) were obtained with Simplicillium sp. (89%) and Lecanicillium sp. (68%).

Resumen: Con el objetivo de aislar e identificar micoparásitos de pústulas de Hemileia vastatrix y conocer su potencial de control de la roya de café, de diciembre del 2014 a enero del 2015 se muestrearon hojas de café arábico con pústulas de roya y presencia de posibles micoparásitos. Los hongos asociados a las pústulas se aislaron e identificaron morfométricamente a nivel de género. Se evaluó el porcentaje de micoparasitismo in vitro de tres de los aislamientos sobre pústulas de roya. Se obtuvieron 23 aislamientos de microorganismos asociados a pústulas de roya: Lecanicillium spp. (7), Calcarisporium sp. (4), Sporothrix sp. (4) y Simplicillium spp. (8). Todos los aislamientos evaluados mostraron micoparasitismo en las uredosporas de roya; sin embargo, 120 h después de la inoculación, los mayores porcentajes (P=0.05) se obtuvieron con Simplicillium sp. (89%) y Lecanicillium sp. (68%).

Abstract The GSTT1 and GSTM1 genes are key molecules in cellular detoxification. Null variants in these genes are associated with increase susceptibility to developing different types of cancers. The aim of this study was to determine the prevalence of GSTT1 and GSTM1 null genotypes in Mestizo and Amerindian individuals from the Northwestern region of Mexico, and to compare them with those reported worldwide. GSTT1 and GSTM1 null variants were genotyped by multiplex PCR in 211 Mestizos and 211 Amerindian individuals. Studies reporting on frequency of GSTT1 and GSTM1 null variants worldwide were identified by a PubMed search and their geographic distribution were analyzed. We found no significant differences in the frequency of the null genotype for GSTT1 and GSM1 genes between Mestizo and Amerindian individuals. Worldwide frequencies of the GSTT1 and GSTM1 null genotypes ranges from 0.10 to 0.51, and from 0.11 to 0.67, respectively. Interestingly, in most countries the frequency of the GSTT1 null genotype is common or frequent (76%), whereas the frequency of the GSMT1 null genotype is very frequent or extremely frequent (86%). Thus, ethnic-dependent differences in the prevalence of GSTT1 and GSTM1 null variants may influence the effect of environmental carcinogens in cancer risk.

Na literatura têm sido discutidos diversos fatores que podem influenciar a dificuldade das tarefas de compreensão de textos e, consequentemente, o desempenho dos sujeitos na avaliação. O objetivo deste estudo é perceber se a dificuldade das tarefas de avaliação da compreensão de textos varia em função da modalidade da tarefa de avaliação (oral versus escrita), do tipo de texto (narrativo versus informativo) e do tipo de compreensão avaliado pelas perguntas apresentadas (literal versus inferencial). Avaliaram-se 300 alunos do quarto ano de escolaridade, administrando quatro testes de compreensão de textos: Teste de compreensão de textos na modalidade oral-narrativo, Teste de compreensão de textos na modalidade oral-informativo, Teste de compreensão de textos na modalidade de leitura-narrativo, Teste de compreensão de textos na modalidade de leitura-informativo. Os resultados mostraram a inexistência de diferenças estatisticamente significativas na média da dificuldade das perguntas de compreensão oral e de compreensão da leitura, entre a dificuldade média das perguntas relativas a texto narrativo e informativo e entre a média da dificuldade das perguntas de compreensão literal e inferencial. Não foram observados efeitos de interação. Discutem-se as implicações destes resultados para a avaliação e intervenção no domínio da compreensão de textos, tendo em conta algumas limitações deste estudo.

Several factors that can influence the difficulty of the text comprehension tasks, and therefore the performance of the individuals, have been discussed in the literature. The goal of this study is to investigate if the difficulty of the text comprehension tasks varies as a function of the modality of the assessment task (oral versus written), the type of text (narrative versus informative) and the type of comprehension assessed by the questions (literal versus inferential). Three hundred students of the fourth grade were assessed using four text comprehension measures: Test of Listening Comprehension of Narrative Texts, Test of Listening Comprehension of Informative Texts, Test of Reading Comprehension of Narrative Texts, and Test of Reading Comprehension of Informative Texts. The results indicated the inexistence of statistically significant differences in the mean difficulty of listening and reading comprehension questions, as well as between the mean difficulty of questions related to narrative and informative texts and literal and inferential questions. No interaction effects were observed. The implications of these results are discussed considering their importance for the selection of the material to be used in the assessment and intervention in the text comprehension area. Some limitations of the study are also highlighted.

Abstract: The aim of this work was to determine human papilloma virus (HPV) high and low risk (HR and LR) genotypes prevalence, and other HPV infection associated risk factors, in men who have sex with men (MSM). A cross-sectional study was conducted, to this end, 104 MSM responded a social demographic and sexual behavior questionnaire and consented sampling of anal epithelium for molecular analysis by polymerase chain reaction (PCR), with β-globin primers as internal control, and HPV L1 region primers. Subsequently, typing was performed by sequencing. Prevalence of HPV in MSM was 34%: 10% HR and 24% LR. The most frequent oncogenic HPV types were 16 (20%), 73 (20%) and 45 (20%), and non-oncogenic VPH 11 (36%), 62 (28%) and 6 (12%). MSM less than 30 years old had greater HPV prevalence. Presence of human immunodeficiency virus (HIV) was not significantly associated to HPV infection in the studied population.

Resumen: El objetivo fue determinar la prevalencia de genotipos de alto y bajo riesgo (AR y BR) del virus de papiloma humano (VPH) y otros factores asociados con la infección en hombres que tienen sexo con hombres (HSH). Se realizó un estudio transversal. Para ello, 104 individuos respondieron un cuestionario sociodemográfico y de comportamiento sexual, consintiendo una toma de muestra de epitelio anal para análisis molecular por reacción en cadena de polimerasa (PCR), utilizando oligonucleótidos para β-globina (control interno) y región L1 del VPH. Tipificación mediante secuenciación. La prevalencia de VPH encontrada fue del 34%: 10% AR y 24% BR. Los genotipos oncogénicos más frecuentes fueron VPH 16 (20%), 73 (20%) y 45 (20%), los no oncogénicos fueron el 11 (36%), 62 (28%) y 6 (12%). Se concluye que los HSH menores de 30 años presentaron una mayor prevalencia de VPH. Ser positivo para el virus de inmunodeficiencia humana (VIH) no mostró asociación con VPH en la población estudiada.

OBJECTIVE: To describe the most recent outbreak of diphtheria in the Dominican Republic and the disease's occurrence and vaccination coverage in 2004-2013. METHODS: Clinical data of diphtheria cases that occurred in 2004 and that met the study's case definition were reviewed along with socioeconomic and epidemiological information from the cases' families. Univariate and multivariate analyses were performed to assess risk factors for fatal diphtheria. Routine surveillance and vaccination coverage data are presented. RESULTS: From January 2004-April 2005, a total of 145 diphtheria cases were reported; 80 (66%) of the 122 cases reported in 2004 met the case definition; 26 were fatal (case-fatality rate: 32.5%). Incidence was highest in the group 1-4 years of age at 5.3 per 100 000; 62.5% were male. Of the 80 cases, 61 (76%) where hospitalized in Hospital A, 17 in Hospital B, and 2 in two other hospitals. Earlier onset (first half of 2004), birth order, and tracheotomy were associated with fatal diphtheria (P < 0.05); cases in Hospital A were also more likely to be fatal (P = 0.066). The average annual diphtheria incidence was 4.91 cases/1 million people in 2000-2003, climbed to 8.8 cases per million in 2004-2005, and dropped to 0.38 in 2006-2014; no diphtheria cases have been reported since 2011. DTP3 vaccination coverage ranged from 72%-81% in 2000-2004 and from 81%-89% in 2005-2013. CONCLUSIONS: The 2004-2005 diphtheria outbreak in the Dominican Republic resulted in important and avoidable morbidity and mortality. Annual cases declined and no cases have been reported in recent years. Maintaining high vaccination coverage and diligent surveillance are crucial to preventing diphtheria outbreaks and controlling the disease.

OBJETIVO: Describir el brote epidémico más reciente de difteria en la República Dominicana, la incidencia de la enfermedad y la cobertura de la vacunación del 2004 al 2013. MÉTODOS: Se analizaron los datos clínicos de los casos de difteria acaecidos en el 2004 y que cumplieron con la definición de caso del estudio, junto con la información socioeconómica y epidemiológica de las familias en las que aparecieron los casos. Se llevaron a cabo análisis de una sola variable y de múltiples variables para evaluar los factores de riesgo de difteria mortal. Se presentan los datos de vigilancia ordinaria y cobertura vacunal. RESULTADOS: De enero del 2004 a abril del 2005, se notificaron un total de 145 casos de difteria; 80 (66%) de los 122 casos notificados en el 2004 cumplieron con la definición de caso; 26 fueron mortales (tasa de letalidad por caso: 32,5%). La incidencia más alta (5,3 por 100 000) se produjo en el grupo de 1 a 4 años de edad; 62,5% fueron varones. De los 80 casos, 61 (76%) se hospitalizaron en el Hospital A, 17 en el Hospital B, y 2 en otros dos hospitales. La aparición más temprana (primera mitad del 2004), el orden de nacimiento y la traqueotomía se asociaron con difteria mortal (P < 0 ,05); la probabilidad de evolución mortal fue mayor en los casos ingresados en el Hospital A (P = 0,066). La incidencia promedio anual de difteria fue de 4,91 casos por millón de personas del 2000 al 2003, ascendió a 8,8 casos por millón durante los años 2004 y 2005, y descendió a 0,38 del 2006 al 2014; no se han notificado casos de difteria desde el 2011. La cobertura de la vacunación con DTP3 varió de 72 a 81% del 2000 al 2004 y de 81 a 89% del 2005 al 2013. CONCLUSIONES: El brote epidémico de difteria de los años 2004 y 2005 en la República Dominicana ocasionó una importante morbimortalidad prevenible. Se produjo un descenso en la incidencia de casos y no se han notificado nuevos casos en los últimos años. El mantenimiento de una alta cobertura vacunal y de una vigilancia eficiente es crucial para la prevención de los brotes epidémicos de difteria y el control de la enfermedad.

The nutrition transition occurred in recent years was accompanied by changes in the pattern of fluid intake worldwide, replacing water for beverages that provide calories. The aim of this study was to characterize the habitual consumption of non-alcoholic drinks and teas in a group of clerks and relate it to the presence of excess weight. A quantitative, descriptive, correlational, cross-sectional study was performed. A 24h recall and a food frequency questionnaire was used. During the month of August 2012 , 72 individuals, of whom 55.6 % were overweight and obese ( Ow/Ob) were interviewed. The average fluid intake was 2,188 ml/day resulting in 18.22 % water, 24.8 % of drinks and tea without sugar and 56.9 % of drinks and sweetened teas. The latter group contributed 13.8 % of Kcal/day/person, exceeding the WHO recommendations. 64% of respondents exceeded that recommendation, highlighting the Ow/Ob group with 85% inadequacy and 19.6 % of total daily Kcal as simple sugars. These data confirm that there is a relationship between sugar consumption and the presence of excess weight.

La transición nutricional ocurrida en estos últimos años se ha acompañado por cambios en el patrón de ingesta de líquidos a nivel mundial, desplazando al agua por bebidas que aportan calorías. El objetivo de este estudio fue caracterizar el consumo habitual de bebidas e infusiones analcohólicas en un grupo de empleados de comercio y relacionar el mismo con la presencia de exceso de peso. Se realizó un estudio un estudio cuantitativo, descriptivo, correlacional y de corte transversal. Se utilizó un recordatorio de 24 horas y un cuestionario de frecuencia de consumo. Durante el mes de Agosto del 2012, se entrevistaron 72 individuos, de los cuales, un 55.6% presentó sobrepeso y obesidad (Sp/Ob). El consumo promedio de líquidos fue de 2188 ml/día, resultando 18.22% de agua, 24.8% de bebidas e infusiones sin azúcar y 56.9% de bebidas e infusiones azucaradas. Este último grupo aportó 13.8% de las Kcal/día/persona, superando las recomendaciones de la OMS. El 64% de los entrevistados superó dicha recomendación, destacándose el grupo Sp/Ob con un 85% de inadecuación y 19.6% del total de Kcal diarias como azúcares simples. Estos datos confirman que existe una relación entre el consumo de azúcares y la presencia de exceso de peso.

A síndrome de Goltz é uma doença genética rara, de herança dominante ligada ao X, mais comum em doentes do sexo feminino e, na maioria das vezes, resulta no aborto dos fetos do sexo masculino. Tem um amplo espectro de manifestações clínicas possíveis. O diagnóstico consiste no somatório dos numerosos achados clínicos, radiológicos e histopatológicos. O tratamento é o aconselhamento genético, cirurgias reconstrutivas e abordagem multidisciplinar, com objetivo de melhorar a qualidade de vida e garantir uma vida normal e produtiva.

Goltz syndrome is a rare genetic disease of X-linked dominant inheritance. It is more common in female patients and, in most cases, results in miscarriage of male fetuses. It has a broad scope of possible clinical manifestations. Its diagnosis consists of the sum of the many clinical, radiological and histopathological findings. The treatment options are genetic counseling, reconstructive surgery and multidisciplinary approach, aiming to improve quality of life and ensure a normal and productive life.

Esteatocistoma múltiplo é um raro transtorno genético autossômico dominante que se caracteriza por múltiplos cistos dérmicos de tamanho variável e assintomáticos. Descreve-se o caso de um paciente do sexo masculino, de 23 anos, com quadro clínico e evolutivo típicos dessa desordem.

Steatocystoma multiplex is a rare genetic disorder, autosomal dominant, that is characterized by multiple asymptomatic dermal cysts which vary in size. It is described here the case of a 23 year-old male patient with a typical clinical and evolutional progression of this disease.

The authors report a case of a male patient in his forties with progressive abdominal pain associated with weight loss, dyspnea, and edema of the inferior limbs, culminating in a surgical acute abdomen. A segmental enterectomy containing a lesion of about 10cm in diameter was performed. It was later confirmed, by means of immuno-hystochemistry, as being a Gastrointestinal Stromal Tumor of high biological aggressiveness. Etiology, diagnosis, classification, prognosis and therapeutic with Imatinib Mesylate - STI-571 (Glivec® - Novartis) are hence discussed.

CONTEXTO: Perineurioma é uma rara neoplasia composta de células que lembram aquelas do perineuro normal e geralmente ocorre no subcutâneo, tecidos moles ou em localização intraneural. Poucos relatos na literatura descrevem perineuriomas no trato gastrointestinal incluindo estômago, cólon e jejuno. RELATO DE CASO: Os autores apresentam as características clinicopatológicas e imunoistoquímicas de um caso de perineurioma ileal apresentando-se clinicamente por obstrução intestinal decorrente de intussuscepção. Perineurioma ileal não havia sido descrito até o momento nessa localização anatômica

CONTEXT: Perineuriomas are rare tumors composed of cells resembling those of the normal perineurium. It usually occurs in subcutaneous, soft-tissue or intraneural locations. Very few reports in the literature have described perineuriomas in the gastrointestinal tract, including the stomach, colon and jejunum. CASE REPORT: We report the clinicopathological and immunohistochemical features of a case of ileal perineurioma that was manifested clinically as intestinal obstruction due to intussusception. Ileal perineurioma has not previously been reported at this anatomical location

En este estudio se reportan las colectas de triatominos realizadas en los estados mexicanos de Chihuahua y Aguascalientes, de los cuales se carecía de datos recientes sobre presencia e infección por Trypanosoma cruzi en triatominos vectores de la enfermedad de Chagas. En Chihuahua se colectaron exclusivamente ejemplares adultos de Triatoma recurva y de Meccus phyllosomus longipennis, con porcentajes de infección por Trypanosoma cruzi de 5,17% y 12,5%, respectivamente. En Aguascalientes se colectaron ejemplares adultos y ninfas sólo de M. p. longipennis, con un porcentaje de infección por T. cruzi de 96,7%. Los resultados indican nula colonización de la vivienda por triatominos en el área de estudio en Chihuahua, así como bajo riesgo de infección por T. cruzi. En contraste, en el área de estudio en Aguascalientes se prevé riesgo alto de infección por T. cruzi a la población. Se requiere de investigaciones entomológicas adicionales en las áreas de estudio para clarificar el riesgo de transmisión vectorial de T. cruzi a los humanos y reservorios animales.

On this study are reported some collections of triatomines from the Mexican states of Chihuahua and Aguascalientes, where recent data about vector infection by Trypanosoma cruzi was not available. In the state of Chihuahua only adult specimens of Triatoma recurva and of Meccus phyllosomus longipennis were collected. Percentages of infection by T. cruzi were respectively 5.17% and 12.5%. In the state of Aguascalientes adult as well nymph specimens of M. p. longipennis were collected. Percentage of infection by T. cruzi reached 96.7%. Our results show a null colonization of human dwellings by triatomines in the study area of the state of Chihuahua, as well as low risk of infection by T. cruzi for the inhabitants of that area. On the other hand, in the study area in the state of Aguascalientes, the risk of infection by T. cruzi was high for inhabitants of the area. Complementary entomological studies are necessary to establish the proper risk of infection by vectorial transmission of T. cruzi to human and animal reservoir host in the two studied areas.