Dr. Murai Éva szerk.: Parasitologia Hungarica 25. (Budapest, 1992)

RESULTS Dog susceptibility Puppies were found susceptible to protoscoleces isolated from the liver and lung cysts of buffalo. Only 2 out of 46 puppies were negative at autopsy (Table 1). Following autopsy, the intestines were examined and mucosal damage was seen particularly in the anterior part. In both sets of experiments, worms were found embedded in the Liberkühn's crypts and increased cellular infiltration was observed at the site of attachment. Protoscolex viability and worm recovery. It is evident from Table 1 that viability of the protoscoleces has a direct influence on worm recovery. The maximum number of worms ( > 1000) was recovered when the viability of protoscoleces was 90-96 %. Table 1 Total worm recovery from the experimental infection of dogs with protoscoleces of buffalo liver and lung origin Infection with liver protoscoleces Infection with lung protoscoleces Group No.of dogs infected Viability of protoscoleces used % Day of autopsy No.of worms recovered Group No.of dogs Viability of infected protoscoleces used % Day of autopsy No. of worms recovered 1 5 70 12 200 1 5 70 12 Negative 16 620 16 450 20 450 20 400 28 300 24 350 32 500 28 200 2 3 65 12 250 2 3 65 24 150 16 Negative 28 125 20 350 32 300 3 4 90 05 800 3 4 90 05 610 20 900 12 700 24 >1000 20 >1000 28 >1000 36 750 4 2 90 36 >1000 4 2 90 40 >1000 40 >1000 42 >1000 5 9 96 12 >1000 5 9 96 12 >1000 16 >1000 16 >1000 20 >1000 20 >1000 24 >1000 24 >1000 28 >1000 28 >1000 32 >1000 32 >1000 36 >1000 36 >1000 40 >1000 40 >1000 42 >1000 42 >1000