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Résultats 51-60 de 514
Effects of repeated Strongylus vulgaris inoculations and concurrent ivermectin treatments on mesenteric arterial lesions in pony foals.
1990
Klei T.R. | Turk M.A.M. | McClure J.R. | Holmes R.A. | Dennis V.A. | Chapman M.R.
Eight of 10 pony foals reared under helminth-free conditions were inoculated PO with 50 Strongylus vulgaris infective larvae/week for 4 weeks, at which time 1 foal died of acute verminous arteritis. Inoculation of 7 remaining foals continued at 2-week intervals for 20 weeks. Of the 7 foals, 3 were treated with ivermectin (0.2 mg/kg of body weight) in an oral paste formulation at experiment weeks 8, 16, 24; 4 foals were not treated. Two foals were not inoculated or treated and served as controls. After the first ivermectin treatment, ivermectin-treated foals had fewer days (12 +/- 2.9) with rectal temperatures > 38.6 C than did nontreated foals (23.3 +/- 3.8). Mean baseline rectal temperatures were 38 +/- 0.2 C. Adverse clinical reactions to ivermectin treatment were not observed in foals. Foals were euthanatized and necropsied 3 weeks after the last ivermectin treatment (week 24). Ivermectin was effective in reducing S vulgaris arterial larval and intestinal adult parasite numbers by 100% in 3 treated foals. Strongylus vulgaris arterial larvae and/or adults were recovered from all 4 nontreated inoculated foals. One nontreated inoculated foal lacked arterial larvae or active arterial lesions, indicating that protective resistance had developed in this individual. Marked gross and histopathologic lesions typical of chronic S vulgaris infection were observed in the 3 nontreated inoculated foals with arterial larvae. Repeated killing of intra-arterial S vulgaris fourth-stage larvae in ivermectin-treated foals did not exacerbate lesions associated with verminous arteritis or induce unique lesions associated with repeated destruction of arterial larvae. Arterial lesions in treated inoculated foals were markedly reduced and had resolved, compared with those in nontreated inoculated foals.
Afficher plus [+] Moins [-]Studies on the early diagnosis of pregnancy of dairy cows by EIA-kit of progesterone in milk.
1990
Kim M.K. | Shin H.J. | Lee M.H. | Lee M.H. | Kim S.K.
Antagonism of xylazine-induced hypotensive effect by yohimbine in rabbits.
1990
Shin D.H.
Fine structure of Theileria sergenti merozoite in Korean native cattle.
1990
Baek B.K. | Kim B.S. | Lee H.I.
Light microscopic observations on the in vitro effects of praziquantel on Heterophyopsis continua.
1990
Woo H.C. | Suh M.D. | Hong S.J.
Avidin-biotin complex for immunohistochemical diagnosis of Aujeszky's disease and hog cholera.
1990
Kim S.B. | Sur J.H. | Moon U.G.
Immunohistochemical identification of Newcastle disease virus with indirect immunoperoxidase technique.
1990
Nho W.G. | Sur J.H. | Kim S.B.
Effects of ammonia water on sporulation of coccidial oocysts originated from bovine.
1990
Wee S.H. | Kang Y.B. | Jang H. | Lee H.S. | Choi S.H.
Pathogenicity, hemagglutinability and the effect of physicochemical agents on virus of rabbit hemorrhagic disease.
1990
Yoon I.J. | Jeon Y.S.
Cultivo de Spirulina maxima ao ar livre. 1: inverno.
1990
Ruiz R.L. | Mos E.N. | Lima C.G. de | Ribeiro M.A.M.