effects of toxocara canis infection on ethnologically assessed fighting generated by breeding activity in mice

The effect of infection of T.canis infective larvae were investigated on social [intermale] aggression and maternal aggression in mated male and lactating female mice. It has been shown that such infection produced a significant inhibition, mainly of maternal aggression parameters and on offensive behaviours category which associated with this form of fighting. Infection with 4000 infective larvae of T.canis has however no significant effect on most parameters of social aggression in mated male mice. The suppressive effects on maternal fighting could be attributed to the fact that lactating females were more susceptible to this stage of infection. The muscular tone data in this study excluded the involvement of myorelaxation in the suppression of maternal aggression. Postmortem investigation of mated and lactating mice, shows the presence of substantial number of T.canis larvae which managed to migrate to the brain

Neurorretinite subaguda unilateral difusa: 3 casos no Estado do Paraná / Diffuse unilateral subacute neuroretinitis (DUSN): 3 cases in Parana State

Os autores relatam 3 casos comprovados de neurrretinite sub-aguda unilateral difusa, encontrados no Estado do Paraná. Dois casos se colocam no quadro de DUSN tardia, onde se encontra palidez de papila óptica, atenuaçäo dos vasos sanguíneos e alteraçäo difusa do epitélio pigmentário da retina. Outro caso se enquadra na fase precoce, com lesöes características

Isolation and characterization of the most immunogenic fraction of Trichostrongylus colubriformis

Six fractions [F[1]-F[6]] were observed from Trichostrongylus colubriformis phosphate buffer extract separated by column chromatography using Sephadex G 200. Only three fractions [F[1], F[2] and F[3]] were antigenically specific in precipitating and haemagglutinating antibody responses

Parasitosis intestinal en el departamento de Santa Cruz / Intestinal parasitosis in the departament of Santa Cruz

Con el fin de dar una vision global en la parasitosis intestinal en el departamento de Santa Cruz se dan a conocer los resultados de dos estudios en prevalecencia realizados por CENETROP entre 1975-1980, asi como de la rutina del laboratorio por 1981. Las tasas mas bajas son encontradas en los valles mesotermicos y en la rutina. Las zonas de bosque muy humedo se caracterizan por tasa altas de nematodes y bajas de H. nana y protozoarios, situacion inversa a la observada en las zonas de bosque seco. Tomando el porcentaje de negativos como indicador del grado de contaminacion fecal de las comunidades, se observa que no existe relacion entre este porcentaje y la prevalencia de los distintos parasitos, salvo para A. lumbricoides y ancylostomidas sp. con una relacion inversa y G. lamblia con una relacion directa.

Intestinal capillariasis from Maha Sarakham Province, northeast Thailand: report of a case.

Intestinal capillariasis cases in Thailand were reported from the areas where people customarily ate raw freshwater fish. The present case came from Maha-Sarakham Province, Northeast of Thailand with the chief complaint of diarrhoea for one month. Eggs, larvae and adult Capillaria philippinensis were found in the faeces. The authors observed that protein-losing enteropathy was an early manifestation on this disease.

Pathological findings in four cases of human angiostrongyliasis.

Three adults and a 3 1/2-year-old child presented with eosinophilic meningitis. A history of consumption of raw snails was elicited in 2; evidence of a constant diet of raw food, in the form of opisthorchiasis and taeniasis, as well as angiostrongyliasis, was present in the third; no history of raw food ingestion was obtained in the fourth, the child. Pathologic changes were similar in all 4 cases. There was infiltration of the meninges and around intracerebral vessels by varying proportions of lymphocytes, plasma cells and eosinophils. Numerous tracks and microcavities were found in the brains, and in the spinal cords in 2 cases, varying in size from 0.1 to 2 mm, and in age, with older tracks containing debris and gitter cells, newer tracks showing disruption of brain tissue, with and without haemorrhage. Numerous 4th and 5th stage Angiostrongylus larvae, alive and dead, were found in the meninges and brain tissue, sometimes in blood vessels or perivascular spaces, in 3 cases; in the fourth case a 5th stage larva was found on the surface of the right frontal lobe. In one case a degenerating larva was found in a pulmonary vessel. Cellular reaction was more often associated with dead larvae.