isoenzyme patterns of extracts of adult schistosomes collected from Hippopotamus amphibius in Kruger National Park compared with similar extracts of adult Schistosoma mansoni and S. rodhaini, characteristics differed suggesting that H. amphibius schistosome is separate species

techniques to locate lesions and recover developmental stages of helminths from equine arteries, subperitoneum, liver, and lungs postmortem

Echinococcus multilocularis, cats are less suitable than dogs as definitive hosts

levamisole toxicity in pigs was enhanced by nicotine-like compound (pyrantel) but was not affected by organophosphate (dichlorvos)

Toxoplasma gondii, goats, prevention of abortion and neonatal death by vaccination with nonpathogenic coccidium Hammondia hammondi

Theileria mutans, 4 isolates obtained from geographically distant parts of South Africa by subinoculation of infected blood were readily transmitted to cattle by Amblyomma hebraeum, all attempts to transmit these isolates with Rhipicephalus appendiculatus were unsuccessful

Babesia bovis, cattle, kinetics of specific indirect fluorescent antibody test titers and total serum IgG and IgM values after vaccination and challenge exposure, nonspecific suppression of total IgG and IgM values coinciding with period of peak parasitemia

Trichinella spiralis, digestion of infective larvae is important constitutive mechanism of resistance in chickens that probably precludes transmission of infection by gallinaceous birds in nature

Babesia occultans n. sp. originally obtained from engorged female Hyalomma marginatum rufipes collected from cattle in Northern Transvaal, transmission studies in laboratory strain of ticks and splenectomized cattle, morphological, serological, and cross-immunity studies distinguished parasite as previously undescribed species highly infective for H. marginatum rufipes but of low virulence in cattle, unsuccessful attempt to transmit transovarially with Boophilus microplus

Amblyomma hebraeum, 60CO irradiation of nymphs failed to attenuate Cowdria ruminatium