Introducción. Los defectos congénitos son alteraciones morfológicas que pueden ser diagnosticadas antes, durante o después del nacimiento. Se han implementado diversos sistemas de vigilancia en hospitales de referencia, principalmente en aquellos de alta complejidad. Objetivo. Comparar la prevalencia de los defectos congénitos en dos hospitales de diferente nivel de complejidad de la ciudad de Cali. Materiales y métodos. Se llevó a cabo un estudio descriptivo basado en la metodología del Estudio Colaborativo Latinoamericano de Malformaciones Congénitas, durante 20 meses en un hospital de mediana complejidad y en otro de alta complejidad. Resultados. Durante el periodo de estudio se atendieron 7.140 nacimientos, en 225 de los cuales se presentó al menos un defecto congénito, con una prevalencia del 1,7 % (IC 95% 1,3-2,0) en el hospital de mediana complejidad y de 7,4 % (IC 95% 6,2-8,7) en el de alta complejidad. En el primero, las frecuencias más altas correspondieron a polidactilia (15 %), apéndice preauricular (8 %) y pie equino varo (7 %), mientras que en el segundo, correspondieron a comunicación interventricular (10 %), hidronefrosis congénita (7 %) y defectos de la pared abdominal (6 %). Conclusiones. La prevalencia de los defectos congénitos varió de un hospital a otro, dependiendo de su nivel de complejidad, y del tipo y la seriedad de los defectos. La vigilancia epidemiológica en los diferentes niveles de atención es una herramienta útil para estimar acertadamente la prevalencia en la ciudad, además de constituir una buena base para la planificación y orientación de los recursos.

Introduction: Birth defects are morphologic alterations diagnosed prenatal or postnatally. Surveillance systems have been used to estimate the prevalence in high complexity care centers; however, the variation of the prevalence among different complexity care centers remains unknown. Objective: To compare the prevalence of birth defects among two different complexity care centers in Cali, Colombia. Materials and methods: A descriptive hospital-based study following the methodology of the Latin American Collaborative Study of Congenital Malformations was conducted during 20 months in a medium complexity hospital and a high complexity hospital. Results: During the study period, 7,140 births were attended of which 225 had at least one birth defect. The prevalence of these was of 1.7% (IC95% 1.3-2.0) and 7.4% (IC95% 6.2-8.7) for the medium complexity hospital and the high complexity hospital, respectively. The highest frequencies for the high complexity care center were: ventricular septal defect, 10%; congenital hydronephrosis, 7%; abdominal wall defects, 6%, and hydrocephalus, 5%, while for the medium complexity were: polydactyly, 15%; preauricular skin tags, 8%; congenital talipes equino varus, 7%, and hemangioma, 6%. Conclusions: The prevalence of birth defects among different complexity care centers varies in quantity, type and severity of the anomaly diagnosed. The surveillance of birth defects is a useful tool for any level of care. It allows estimating more accurately the prevalence of the city, as well being a base for the planning and targeting of resources according to the prevalence of different congenital defects.

Introduction: Mowat-Wilson syndrome (MWS) is a very infrequent congenital polimalformative disorder, caused by mutations, deletions or insertions of the ZEB2 gene, which codify for a protein that is involved in the migration of the neural crest cells and the development of middle line structures. The inheritance pattern is autosomal dominant, haplo-insufficient. Objectives: To describe a case of Mowat-Wilson syndrome with typical phenotype. Clinical case: 8 year-old female, with special facie, hard to control seizures, ductus arteriosus, left pulmonary artery stenosis, constipation, severe retardation of psychomotor development and speech retardation. Differential diagnosis of Mowat Wilson syndrome is proposed. Conclusion: Mowat and Wilson syndrome is very rare not well-known; therefore it is important to communicate its features within the pediatric community. In this syndrome multiple organs and systems are involved, so a multidisciplinary approach is mandatory; in order to the objective of adequately intervening in the pathology of each patient, provide adequate information regarding the developmental expectations for the child and genetic and reproductive counseling to the parents.

Introducción: El síndrome de Mowat-Wilson (MWS) es un síndrome polimalformativo congénito de muy baja frecuencia causado por mutaciones, inserciones o deleciones del gen ZEB2, que codifica para una proteína que está involucrada en la migración de las células de la cresta neural y en el desarrollo de las estructuras de la línea media. El patrón de herencia es autosómico dominante, haploinsuficiente. Objetivo: Describir un caso con fenotipo característico de Síndrome de Mowat-Wilson. Caso clínico: Paciente femenino de 8 años, con facies especiales, síndrome convulsivo de difícil control, ductus arterioso, estenosis de la rama izquierda de la arteria pulmonar, estreñimiento, retraso severo del desarrollo psicomotor y del lenguaje en el cual se plantea el diagnóstico clínico de síndrome de Mowat-Wilson. Conclusión: El Síndrome de Mowat Wilson es un síndrome de baja frecuencia, poco conocido, por lo que es importante difundir sus características en la comunidad pediátrica. En este síndrome se afectan múltiples sistemas y órganos, lo cual requiere un manejo multidisciplinario con el objetivo de intervenir adecuadamente en la patología de cada paciente, dar adecuada información de las expectativas del desarrollo del niño y consejería genética y reproductiva la familia.

The full spectrum analysis of rotating machine vibrations is a diagnostic tool that enables the symptoms of some special types of fault to be clearly detected. The Shape and Directivity Index (SDI) of journal filtered orbits is an additional diagnostic parameter whose evaluation can be combined with the full spectrum analysis. The ellipticity of the filtered orbit, as well as the amplitude and the inclination angle of the major axis of the orbit, are parameters whose analysis can provide important diagnostic information. In order to validate the proposed approach, the vibrations of a large turbine-generator unit that was subjected to rotor-to-stator rubs have been analyzed in this paper. The results of this investigation have been used to update the model of the rotor-system that has been used to identify the location and the severity of the fault. In the paper, the improvements in the accuracy of the fault identification provided by the model updating enabled by the SDI analysis are shown.

A capacidade de produção de megassíndrome de três cepas de Trypanosoma cruzi de diferentes origens foram examinadas usando-se técnicas previamente descritas. Uma correlação significante foi encontrada entre volume e peso do estômago através de autópsia e a área correspondente a silhueta de bário do órgão. Todas as três cepas causam dilatação significante da área do estômago, após prolongada infecção em camundongos quando comparados com o grupo controle não infectado. Todavia, o modelo de comportamento da cepa (MEGA), previamente estudada, pode ter sido alterada pela reciclagem em camundongos nos laboratórios.

The mega-producing capacity of three strains of Trypanosoma cruzi of widely different origins was examined using techniques previously described. A significant correlation was found for two of the strains between the volume and weight of the stomach at autopsy and measurement of the area of a barium silhouette of this organ. All three strains caused significant stomach dilatation after prolonged infection in the mice when compare with a control uninfected group. However the behavior of a strain (mega) previously studied in this model had altered, possibly as a result ofrepeated mice passage in the laboratory.