Parafilaria bovicola in naturally and experimentally infected calves, pathological changes, comparison of lesions found during the pre-patent period with those found during patency, with object of estimating age of lesions by their macroscopic and microscopic appearance

Dermacentor andersoni, transmission of Anaplasma marginale to splenectomized calves by injection of gut homogenates from incubated vs. non-incubated adult ticks

Cytauxzoon felis, susceptibilities of (i) domestic cats to inoculation with infected bobcat blood and ground tissues; (ii) domestic cats to subinoculation with blood from cats having received bobcat blood; (iii) inoculated cats to subsequent challenge exposure with deep-frozen virulent inoculum of domestic cat origin; and (iv) eastern bobcat to reinoculation with various doses of virulent Cytauxzoon inoculum of domestic cat origin; additional experiments to determine if piroplasm levels in bobcats and domestic cats could be raised to maximize chances for further transmission of Cytauxzoon to domestic cats

gastrointestinal parasites, horses, anthelmintic efficacy of ivermectin, adverse local or systemic reactions not observed

Eimeria christenseni, Trichostrongylus colubriformis, pygmy goats (exper.), effects of concurrent subclinical infections on liveweight; apparent feed digestibility; balances of calcium, nitrogen, and phosphorus; serum copper and zinc concentrations; and bone matrix mineralization

nematodes, dogs, ivermectin activity; no activity against cestodes

Dirofilaria immitis, Dipetalonema reconditum, prevalence in dogs: Virginia; North Carolina

Parafilaria bovicola, field survey of insect vectors collected from cattle, bleeding-point on cows and prepatent period studies, experimental infection of laboratory-raised Musca autumnalis with third-stage larvae, transmission of third-stage larvae to calves (clinical and pathologic findings)

Fasciola hepatica, calves (exper.), age-related susceptibility to infection determined by fecal egg counts at various sampling times following infection, numbers of flukes in liver of calves at slaughter, and antibody response as evidenced by enzyme-linked immunosorbent assay

Ascaris suum, swine, immune responses monitored by lymphocyte blastogenesis assays, indirect radioimmunoassays, peripheral eosinophil counts, and cutaneous delayed hypersensitivity reactions