Hypolobocera chilensis eigenmanni crabs were collected from small streams during the dry season, 1997 (May to December) in the Chaquicocha area belonging to the district of Condebamba (Department of Cajamarca) in the northern region of Peru. One hundred thirty one crabs were collected, transported and examined in the Parasitology Laboratory by dissection, 27 out of 131 (20,6%) were infected by Paragonimus mexicanus (=peruvianus) metacercariae. The intensity of infection was from 1 to 5 in most of the cases (81,5%) with an average of 4,85 per crab. These data are different from past studies in the same area with higher figures, indicating decreasing tendency in the number of infected crabs.

It has been studied the presence of Fasciola hepatica L., in Huinco, place without livestock, localized in the Province of Huarochiri, Department of Lima, September 1971 and July 1972. Lymnoea viator and Physa venustula were examined looking for stages of F. hepatica and it was also performed exam of feces of the human population Iookíng for eggs of the parasite. Only L. viator snails were found infected by F. hepatica, it was confirmed with the presence of adult parasites in the biliary tract of mice infected with metacercaría obtained from L. viatar. The human infection by F. hepatica was low (0.88%). No being Huinco place for livestock, it was concluded the infection of the snails by F. hepatica could happen when the eggs arrive through the water coming from livestock places localized in higher areas than Huinco.

Hypolobocera chilensis eigenmanni crabs were collected from small streams during the dry season, 1997 (May to December) in the Chaquicocha area belonging to the district of Condebamba (Department of Cajamarca) in the northern region of Peru. One hundred thirty one crabs were collected, transported and examined in the Parasitology Laboratory by dissection, 27 out of 131 (20,6%) were infected by Paragonimus mexicanus (=peruvianus) metacercariae. The intensity of infection was from 1 to 5 in most of the cases (81,5%) with an average of 4,85 per crab. These data are different from past studies in the same area with higher figures, indicating decreasing tendency in the number of infected crabs.

Se determina la presencia de Fasciola hepatica L., en la localidad de Huinco, zona no ganadera de la Provincia de Huarochirí, Departamento de Lima, setiembre 1971 - julio de 1972. Se examinaron caracoles Lymnaea viator y Physa venustula en busco de estadios evolutivos de F. hepatica, así como exámenes de heces de la población humana en busca de huevos del parásito. Se encontraron caracoles L. viator infectados con estadios larvarios de Fasciola, lo cual se comprobó al desarrollarse ejemplares adultos del parásito en las vías biliares de ratones que fueron infectados con metacercarias obtenidas de los caracoles. La infección humana por Fasciola hepatica fue bajo (0.88%). No existiendo ganadería en la localidad, se concluye que la infección del caracol ocurre por lo llegada a Huinco de huevos de F. hepatica por los cursos de agua de localidades ganaderos situadas en zonas más a...

In Condebamba Valley (Cajamarca) between February and July 1973; 69 crabs Pseudothelphusa chilensis were collected, of them (34 males and 35 females) 22 (64.7%) males and 29 (28.85%) females were infected with metacercariae, this results are consistent with Cuba et al. (1974) report.

En los meses de febrero y julio de 1973 se colectaron cangrejos del Valle de Condebamba (Cajamarca) correspondientes a Pseudothelphusa chilensis, 69 de ellos (34 machos y 35 hembras) fueron examinados, buscando metacercarias de Paragonimus; 22 (64.7%) de los machos y 29 (28.85 %) de las hembras resultaron infectados con metacercarias, o sea 52 (72.46%) de los 69 cangrejos estaban infectados, esta cifra es coincidente con la obtenida por Cuba y cols. (1974).