ABSTRACT
Eight dogs were experimentally infected with Sarcocystis by oral inoculation of cardiac muscle from naturally infected cattle. The infected dogs commenced discharging of sporocysts in the feces after 10 to 12 days of inoculation, and continued until 20 and 35 days after inoculation. Three dogs were reinfected with cardiac muscle from the naturally infected cattle. Sporocysts reappeared in the feces on 12 to 13 days after reinfection. Sarcocystis sporocysts collected from the experimentally infected dogs were fed to each of the two 30-day-old Korean native calves. The infected calves remained clinically normal, except for the high fever (> or = 40 degrees C) and decreased hematocrit values on day 30 to 40 post inoculation. Muscular cysts of Sarcocystis were found from infected calves on day 40 post inoculation. Proliferative forms of Sarcocystis were also observed in the muscle of infected calves. These results suggest that the Sarcocystis cruzi found in Korean native cattle has a 2-host life cycle with dogs as the definitive host and Korean native calves as the intermediate host.
Subject(s)
Animals , Cattle , Cattle Diseases/parasitology , Dog Diseases/parasitology , Dogs/parasitology , Host-Parasite Interactions , Korea , Life Cycle Stages , Sarcocystis/growth & development , Sarcocystosis/parasitologyABSTRACT
Um caso de sarcosporidiose muscular em uma paciente de 29 anos de idade é relatado. O quadro clínico evidenciava síndrome miopática tipo cinturas com leve mialgia de 4 anos de evoluçäo. A biópsia muscular do músculo deltóide mostrou a presença de formaçäo císticas de permeio a fibras musculares normais. O diâmetro, comprimento e provável cápsula dessas formaçöes säo características da infestaçäo pelo coccideo Sarcocystis sp. Outras características histopatológicas e a distinçäo com as formaçöes císticas da toxoplasmose säo comentadas. A maioria dos casos descritos na literatura - pouco mais de três dezenas - evidencia a ausência de quadro clínico típico, devendo a moléstia entrar no diagnóstico diferencial ocasional das doenças musculares esqueléticas ou cardíacas, inflamatórias e/ou parasitárias