Cytauxzoon felis, susceptibilities of bobcats, 4 species of domestic farm animals, 9 species of laboratory animals, and 17 wildlife species to infection using infective material from domestic cats, Lynx rufus floridanus developed cytauxzoonosis with signs and lesions identical with those of domestic cats and died of disease, Lynx rufus rufus developed subclinical persistent parasitemia, results indicate that both species of bobcats may serve as reservoir hosts; sheep developed low persistent parasitemia without clinical signs, while other species of animals failed to produce evidence of cytauxzoonosis

Dirofilaria immitis, dogs (exper.), location, growth, and time required for larvae to molt and develop

In 1973-1974, 4 controlled tests were performed in pony foals (n = 17) raised parasite-free and experimentally infected with Strongyloides westeri. Administration of infective larvae by stomach tube in 1 test resulted in low-grade infections and tended to invalidate the test. Intraoral and percutaneous (intra-aural) administration of larvae resulted in suitable test infections for 1 and 2 tests, respectively. A paste formulation of dichlorvos at 36.3 mg/kg of body weight removal from 4 ponies. Treatment of 4 the dosage rate of 44 mg/kg was consistently effective (greater than 99% to 100%) for eliminating intestinal infections of S westeri.

Amblyomma maculatum, experimental vector of Cowdria ruminantium in goats, other Amblyomma spp. unsuccessful; Theileria mutans in calves transmitted by Amblyomma variegatum, but not by other Amblyomma spp.

Strongylus vulgaris, massive infections of nonimmune and immune ponies, pathogenesis characterized, blood chemical and peritoneal fluid values as possible diagnostic aids

A corn culture of Fusarium roseum was added to a standard corn-soybean swine gestation ration. Low, middle, and high dosage mixed feeds contained 7, 38, and 64 mg of zearalenone/kg of feed (7, 38, and 64 ppm) and 0.5, 2.5, and 4.5 mg of deoxynivalenol/kg, respectively. Control feed was the standard ration without added F roseum corn culture. Mature gilts were bred by natural service and fed control or F roseum molded feed from 3 to 34 days after breeding. The main effect of the molded feed was an inhibition of fetal development, with decreased numbers of fetuses present in treated animals at slaughter (38 to 43 days after breeding). Normal litters were present in 7 of 8 control animals, in 2 of 4 gilts given the low-dosage feed, in 1 of 4 gilts given the medium dosage, and in 0 of 4 given the high-dosage feed. Corpora lutea were maintained in all treated animals, as evidenced by serum progesterone concentrations. Serum estradiol concentrations were decreased in gilts in the middle- and high-dosage groups. The genital system of the gilts fed low- and middle-dosage feeds had a gross and microscopic appearance similar to that of the pregnant controls and reflected prolonged progesterone stimulation. Morphologic changes in the genital system of the high-dosage group were intermediate between changes induced by progesterone and those induced by estrogen. Clinical signs of hyperestrogenism and partial feed refusal were noticed in only some of the high-dosage group animals.

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

Fasciola hepatica, sheep (exper.), diagnosis, evaluation of 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

Strongylus vulgaris (larvae), Trichostrongylus axei (adults), ponies (exper.), efficacy of ivermectin, controlled tests