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Efficacy of ivermectin against naturally acquired and experimentally induced nematode infections in sheep
1982
Wescott, R.B. | LeaMaster, B.R.
The activity of ivermectin against common nematode parasites of sheep was examined in 2 experiments. In the 1st experiment, 14 sheep with naturally acquired infections were assigned to 2 groups of 7 sheep each. Sheep in 1 group were treated with 200 micrograms of ivermectin/kg of body weight and the remainder served as nontreated controls. In the 2nd experiment, 15 sheep with experimentally supplemented infections (including a benzimidazole-resistant strain of Haemonchus contortus) were assigned to 3 groups of 5 each. The 1st group was treated with 200 micrograms of ivermectin/kg, the 2nd was treated with 88 mg of thiabendazole/kg, and the 3rd served as nontreated controls. Ten to 12 days after treatment, all sheep were euthanatized and necropsied, and the parasites they harbored were recovered and identified. Efficacy of ivermectin was excellent (greater than 96%) against Dictyocaulus filaria, H contortus, Ostertagia circumcinta, Marshallagia marshalli, Trichostrongylus axei, T colubriformis, and T vitrinus. Treatment was not as uniformly effective for Nematodirus spathiger (73% to 85%), N filicollis (80% to 96%), Cooperia curticei (92% to 100%), immature nematodes (92% to 100%), and early 4th-stage larvae (46% to 100%). Efficacy of thiabendazole was poor for H contortus (42%) and early 4th-stage larvae in the abomasum (52%), but approached 100% for most of the other parasites.
Show more [+] Less [-]Studies on Parafilaria bovicola Tubangui, 1934. III. Pathological changes in infested calves
1982
Viljoen, J.H. | Coetzer, J.A.W.
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
Show more [+] Less [-]Influence of increased temperature on Anaplasma marginale Theiler in the gut of Dermacentor andersoni Stiles
1982
Kocan, K.M. | Barron, S.J. | Holbert, D. | Ewing, S.A. | Hair, J.A.
Dermacentor andersoni, transmission of Anaplasma marginale to splenectomized calves by injection of gut homogenates from incubated vs. non-incubated adult ticks
Show more [+] Less [-]Anthelmintic efficacy of ivermectin given intramuscularly in horses
1982
DiPietro, J.A. | Todd, K.S. | Lock, T.F. | McPherron, T.A.
gastrointestinal parasites, horses, anthelmintic efficacy of ivermectin, adverse local or systemic reactions not observed
Show more [+] Less [-]Effects of concurrent subclinical infections by coccidia (Eimeria christenseni) and intestinal nematodes (Trichostrongylus colubriformis) on apparent nutrient digestibilities and balances, serum copper and zinc, and bone mineralization in the pigmy goat
1982
Frandsen, J.C.
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
Show more [+] Less [-]Activity of ivermectin against canine intestinal helminths
1982
Anderson, D.L. | Roberson, E.L.
nematodes, dogs, ivermectin activity; no activity against cestodes
Show more [+] Less [-]Survey for heartworm, Dirofilaria immitis, and Dipetalonema reconditum (Nematoda:Filarioidea) in dogs from Virginia and North Carolina
1982
Falls, R.K. | Platt, T.R.
Dirofilaria immitis, Dipetalonema reconditum, prevalence in dogs: Virginia; North Carolina
Show more [+] Less [-]Parafilaria bovicola (Tubangui 1934) in cattle: Epizootiology--vector studies and experimental transmission of Parafilaria bovicola to cattle
1982
Bech-Nielsen, S. | Bornstein, S. | Christensson, D. | Wallgren, T.B. | Zakrisson, G.
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)
Show more [+] Less [-]Experimentally induced Fasciola hepatica infection in young calves
1982
Hall, R.F. | Lang, B.Z. | Waldhalm, D.G. | Farrell, C.J. | DeLong, W.J.
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
Show more [+] Less [-]Immune responses of swine to oral inoculation with embryonated eggs of Ascaris suum
1982
Rhodes, M.B. | Keralis, M.B. | Staudinger, L.A.
Ascaris suum, swine, immune responses monitored by lymphocyte blastogenesis assays, indirect radioimmunoassays, peripheral eosinophil counts, and cutaneous delayed hypersensitivity reactions
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