In order to determine the role of rat fleas in the life cycle of Hymenolepis diminuta, between November 2009 and March 2010, 27 rats were captured in Cercado de Lima and their ectoparasites were examinated, using standard parasitological procedures. In examined rats, 22 (81.5%) were infected with the parasite H. diminuta, 85,2% were infested with siphonapters of the species Xenopsylla cheopis. Of the 158 fleas that were found, 12% housed cysticercoids in its hemocoel, which were inoculated into albino rats of Holtzman strain, and then developed to adult stage of Hymenolepis diminuta. The results of this study are conclusive and constitute the first record of the role of X. cheopis as natural intermediate host in Peru, making it necessary to reconsider the risk factors and preventive measures.

Con el objetivo de determinar el rol de las pulgas de las ratas en el ciclo biológico de Hymenolepis diminuta, entre noviembre del 2009 y marzo del 2010, se capturaron 27 ratas del Cercado de Lima y examinaron sus ectoparásitos, empleando los procedimientos parasitológicos estándares. De las ratas examinadas, 22 (81,5%) de las ratas examinadas estuvieron infectadas con el parásito H. diminuta, el 85,2% de ratas estuvo infestado por sifonápteros de la especie Xenopsylla cheopis. De las 158 pulgas encontradas, el 12% albergaba cisticercoides en su hemocele, los que al ser inoculados en ratas albinas de la cepa Holtzman, desarrollaron hasta el estadio de adultos de la especie Hymenolepis diminuta. Los resultados del presente trabajo son concluyentes y constituyen el primer registro del rol de X. cheopis como hospedero intermediario natural en Perú, por lo que es necesario reconsidera...

Snake venoms are polienzymatic concentrated whose biological activity on some bacteria and protozoa has been proven. To study the in vitro activity of Lachesis muta and B othrops atrox venoms on the viability and the development of Ascaris suum eggs is the main objecbve of this work. The venoms were employed in non embryonated and in vitro embryonated eggs of Ascaris suum at different concentrations (2, 4, 8,16 mg/mL). The activity of the venoms in the eggs and other substances like 5,25% sodium hypochlorite, Albendazol (commercial solution) and sodium chloride was compared. Both venoms, at 2, 4, 8, 16 mg/mL concentrations, inhibited segmentation of these eggs until the sixth day of incubation, when they began an apparently normal embryonation process that ended in the formation of the infective stage. The most effective inhibitory concentration was 16 mg/mL of B. atrox venom. The sodium...

Snake venoms are polienzymatic concentrated whose biological activity on some bacteria and protozoa has been proven. To study the in vitro activity of Lachesis muta and B othrops atrox venoms on the viability and the development of Ascaris suum eggs is the main objecbve of this work. The venoms were employed in non embryonated and in vitro embryonated eggs of Ascaris suum at different concentrations (2, 4, 8,16 mg/mL). The activity of the venoms in the eggs and other substances like 5,25% sodium hypochlorite, Albendazol (commercial solution) and sodium chloride was compared. Both venoms, at 2, 4, 8, 16 mg/mL concentrations, inhibited segmentation of these eggs until the sixth day of incubation, when they began an apparently normal embryonation process that ended in the formation of the infective stage. The most effective inhibitory concentration was 16 mg/mL of B. atrox venom. The sodium...

Objetivos: Determinar la presencia de enfermedad de Chagas y Trypanosoma cruzi, en reservorios humanos y animales, en localidades del departamento de Amazonas, Perú. Diseño: Descriptivo, transversal. Institución: Instituto de Medicina Tropical Daniel A. Carrión, Facultad de Medicina, UNMSM Participantes: Pobladores de Quintaleros, el Ron, las 3 Marías, San Antonio, del distrito de Cajaruro, provincia de Utcubamba, departamento de Amazonas, Perú. intervenciones: Se viajó al Departamento de Amazonas, en mayo de 2011, para colectar los vectores. Principales medidas de resultados: Presencia de enfermedad de Chagas y Trypanosoma cruzi. Resultados: Se colectó los vectores de enfermedad de Chagas Panstrongylus herreri (Wygodzinsky, 1948), 131 especímenes (19 machos, 33 hembras, 79 ninfas y 92 huevos) y se encontró (15) triatominos infectados por T. cruzi; se les aisló en ratones Balb...