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- W2327946875 abstract "Tritrichomonas foetus infections were eliminated from six bulls by the oral administration of dimetridazole at the rate of 50 mg/kg body weight daily for 5 consecutive days. The chemical was given either by capsule, or admixed with the feed. Five daily doses at 25 mg/kg administered by capsule freed another bull of T. foetus, but this level was ineffective when fed in grain to two bulls. One of the latter subsequently became negative after repeated courses of treatment at higher dosages. The other bull retained the infection. Bovine venereal trichomoniasis, according to Levine (1961), probably is the third-ranking cause of abortion in cattle. Secondary complications, such as endometritis and pyometra, also contribute to the economic losses occasioned by infections of Tritrichomonas foetus. Levine, in 1961, summarized the extensive literature on this parasite. Subsequent reports pertinent to the chemotherapy of the disease include those of Francis and Collins (1963), Fitzgerald et al. (1963), Gasparini et al. (1963), Rigoulet (1963), and McLoughlin (1963, 1964). The first two papers deal with topical application of therapeutic agents, and the others with the systemic use of imidazole derivatives. Although encompassing much of the material included in brief earlier notes (loc. cit.), this report presents more comprehensive and detailed observations on the oral use of dimetridazole (1,2-dimethyl-5-nitroimidazole) against T. foetus infections in bulls. MATERIALS AND METHODS Experimentally infected bulls were used throughout. The animals were anesthestized, or adequately tranquilized, the penis withdrawn from the sheath, scarified, and then massaged with the trichomonad culture. The animals were examined 1 week after exposure to the parasite and were reexamined prior to treatment to verify the infection. In no instance was an established infection spontaneously lost. Preand posttreatment examinations were made by pipetting physiological saline into the prepuce, closing the opening by hand, and massaging for several minutes. The washings were then collected, centrifuged, and portions of the sediment used to inoculate tubes of Diamond's medium (Diamond, 1957); other portions were examined microscopically for trichomonads. The cultures were examined after intervals of 48, 120, and 144 hr. Received for publication 5 April 1965. The animals were weighed at the last pretreatment examination. Dimetridazole (supplied through the courtesy of Rhodia, Inc., New York, N. Y.) was administered either by capsule with the aid of a balling gun, or admixed in the daily grain ration in dosages of 25 to 100 mg/kg body weight. Each course of treatment lasted 5 days. With the 50-mg dosage administered in the feed, it was necessary to mask the flavor of the medicated grain with molasses after the 2nd day, and finally to withhold all other feed after the 4th day to assure total consumption of the medicament. At least three negative posttreatment examinations during a period of 1 to 7 months were made before an animal was considered free of the disease. Two of the treated bulls were test-bred, and one animal was necropsied." @default.
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- W2327946875 date "1965-10-01" @default.
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- W2327946875 title "Dimetridazole, a Systemic Treatment for Bovine Venereal Trichomoniasis. I. Oral Administration" @default.
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- W2327946875 doi "https://doi.org/10.2307/3276171" @default.
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