Parasitological and pathological studies on Neospora caninum in experimentally infected dogs [electronic resource].

Includes references.

Neospora caninum is a protozoan parasite. It was isolated from brain of naturally infected rats and fed on puppies. Five to ten days post-infection, puppies began to excrete unsporulated oocysts. Sporulated oocycts were fed to rats. After death, fresh smears from intestines of puppies and brain smears stained with Giemsa stain from rats were taken for parasitological examination. Meanwhile, tissue specimens from the internal organs were taken from puppies and rats for histopathological examination. However, only brains from rats were taken for electron microscopy examination. Histopathological examination revealed meningoencephalomyelitis, hepatitis, nephrosis and occasional interstitial pneumonia in puppies and rats, in addition to myocarditis and myocitis in puppies. Tissue cysts and tachyzoites were present in lesions in the brain of rats. In puppies, tachyzoites were seen in the brain and in parasitophorous vacuoles within the cytoplasm of epithelium lining the small intestine.

Summary in Arabic.

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