Ostertagia ostertagi, calves, inoculation doses producing severe and even fatal infections failed to induce resistance against reinfection

Eimeria zuernii, E. bovis, calves (exper.), lasalocid sodium in various doses evaluated

Haematobia thirouxi potans, two methods described for laboratory rearing, adult flies can be fed either on a bovine calf or on bovine blood in vitro

Psoroptes ovis, calves, control with ivermectin, dosages and routes of administration; effect on Bovicola bovis; Otobius megnini not affected

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)

gastrointestinal helminths in calves, field conditions, febantel, no activity against Moniezia benedeni, no signs of intoxication

Babesia bovis, nonviable tissue culture-derived antigens as vaccine in cattle, comparison with premunition

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

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

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