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.

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.

The frequency of seropositives and risk of exposure to Toxocara canis in the personnel working in veterinary clinics in the city of Lima was determined. An exposed group with direct contact to dogs (n=135) and a non-exposed group of administrative staff (n=108) were evaluated. Sera samples were analyzed by ELISA test using excretion/ secretion antigens of L2 larvi of T. canis in dilutions of 1/200, 1/400, 1/800, 1/1600 and greater than 1/1600, searching for IgG antibodies. In the exposed group, 95.6, 58.5, 37.0, 23.7 y 9.6% resulted positive in the dilutions studied, respectively, and in the non-exposed group 97.2, 50.0, 32.4, 17.6 y 3.7% resulted positive respectively. No association was found between the proportion of positives and the two groups. It was concluded that the professional practice does not represent a risk factor for the occurrence of human infections by T. canis.

The frequency of seropositives and risk of exposure to Toxocara canis in the personnel working in veterinary clinics in the city of Lima was determined. An exposed group with direct contact to dogs (n=135) and a non-exposed group of administrative staff (n=108) were evaluated. Sera samples were analyzed by ELISA test using excretion/ secretion antigens of L2 larvi of T. canis in dilutions of 1/200, 1/400, 1/800, 1/1600 and greater than 1/1600, searching for IgG antibodies. In the exposed group, 95.6, 58.5, 37.0, 23.7 y 9.6% resulted positive in the dilutions studied, respectively, and in the non-exposed group 97.2, 50.0, 32.4, 17.6 y 3.7% resulted positive respectively. No association was found between the proportion of positives and the two groups. It was concluded that the professional practice does not represent a risk factor for the occurrence of human infections by T. canis.