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

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.

influence of parasitemia level of calves at time of feeding by Dermacentor andersonii upon development of Anaplasma marginale in the ticks

Sarcocystis alceslatrans, dogs fed moose musculature shed sporocysts in feces, endogenous development in small intestine, ultrastructure of oocyst and sporocyst walls during sporogony, intestinal inoculation; coyote and cats fed sarcocyst-infected moose meat did not pass oocysts or sporocysts in feces

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

heartworm-infected dogs (infected by transplantation of adult worms), pulmonary arterial disease following use of adulticide (thiacetarsamide) modified by aspirin or prednisolone, arteriographic study

Dermacentor andersoni, density, size, type, and distribution of colonies of Anaplasma marginale in gut of ticks incubated at 37 C for various periods

Trypanosoma brucei in Peromyscus maniculatus, erythrocyte pathologic changes and phagocytosis, light and electron microscopic studies

Toxocara canis, cynomolgus macaques (exper.), visceral larva migrans, hematologic and serologic changes, neurologic signs, diminished growth rates, diagnostic antibody titers in enzyme-linked immunosorbent assay, severe granulomatous hepatitis and encephalomyelitis, no ocular lesions, basis for clinical interpretation and diagnosis in humans