Nineteen species of gastro-intestinal nematodes were recovered from 10 Burchell's zebra. These include: Cyathostomum alveatum, C. montgomeryi and C. tetracanthum; Cylicocyclus auriculatus, C. gyalocephaloides, C. insigne and C. triramosus; Cylicodontophorus schürmanni and Cylicodontophorus n.sp., Cylicostephanus bidentatus, C. calicatus and C. minutus; Poteriostomum ratzii, Craterostomum acuticaudatum, Triodontophorus minor, Habronema majus, H. muscae, H. zebrae, and Draschia megastoma, as well as Cylindropharynx spp. The highest burdens encountered were those of Cylicocyclus triramosus (159 491), Cylindropharynx (19 875), Cylicocyclus auriculatus (15 792), Cylicostephanus calicatus (16 658) and Cyathostomum tetracanthum (13 723). The nematodes consistently present in all zebras were: Cylicostephanus calicatus, Cylindropharynx spp. and Draschia megastoma.

Amblyomma hebraeum, percentage and rate of female attachment to rabbits was higher (except shortly after release of females) around feeding males than in areas previously treated with extract of fed males, effect of elapsed time and of number of males vs. equivalent extract on attachment values, results prove bioassays to be valid for component and extract-equivalent assessment

fenbendazole safety tested in pigs, significant gross or histopathologic lesions not found

Angiostrongylus cantonensis, infections in specific-pathogen-free rats (lung) provides cross-protective response to infections with Pasteurella pneumotropica

Strongylus spp. and other parasites of equids (natural infections), controlled tests with fenbendazole in multiple doses at two dose levels

The male, female, nymph, and larva of Haemaphysalis (Rhipistoma) norvali sp. n., are described and compared with other members of the H. (R.) spinulosa group. Adult H. (R.) norvali parasitize the southern African hedgehog, Erinaceus frontalis Smith, in Matabeleland, Zimbabwe. Immatures were reared on a laboratory rabbit.

Two of 3 groups of Holstein-Friesian steers (groups II and III; n = 5 each) were fed a ration containing corn naturally contaminated with 800 ng of aflatoxin/g. The other group of steers (group I; n = 5) was fed a ration containing noncontaminated corn. The respective rations were fed for 17.5 weeks, except the ration given to group III; the latter's first diet (contaminated with aflatoxin) was changed to a noncontaminated diet after 15 weeks, continuing for the remaining 2.5 weeks. All steers were killed and tissues and fluids were obtained for aflatoxin analysis. Although aflatoxin B1 and M1 could be detected in blood and urine at several sampling times during the experimental period in groups II and III steers (given the diets containing aflatoxin), there appeared to be no effects on body weight gains and immune phenomena, such as lymphoblastogenesis and antibody production, but there was a waning of the delayed cutaneous hypersensitivity in steers given aflatoxin-contaminated diets. In group III animals (diet was changed to noncontaminated ration at 15 weeks), aflatoxin B1 and M1 disappeared from urine before they were slaughtered. All tissues and fluids, except the rumen contents from these group III steers, were void of detectable aflatoxins B1 and M1 at necropsy. The concentrations of aflatoxin B1 in the rumen content of the latter steers were low. All tissues collected at necropsy from the group II steers fed the aflatoxin diet throughout the 17.5 weeks had detectable aflatoxins B1 or M1 present.

Strongylus vulgaris, establishment of patent infections in 6 of 8 helminth-free ponies given adult worms via nasogastric tube, removal of worms from cecum and ventral colon of donor horses, initial appearance of eggs in feces and maximum egg counts of recipients, percentage survival of adults after intragastric inoculation determined at necropsy

Dirofilaria immitis adults, dogs (exper.), description of pulmonary embolism caused by treatment with thiacetarsamide, scanning electron and light microscopy; first report of 'complicated' arteriosclerotic plaques in conjunction with D. immitis infection

Moniezia sp. in naturally infected calves on pasture, fenbendazole efficacy at three dosage levels: Georgia