Abstract

BOWEN and Sullivan (1971) and Bowen et al. (1971) reported certain effects of dietary cupric sulfate (0.025, 0.05 or 0.10%) in young turkeys. Body weight gain was decreased when cupric sulfate was added to diets containing 22 parts per million (p.p.m.) of penicillinstreptomycin, 1:3. It would appear that high levels of cupric sulfate interfered with the growth promoting activity of penicillin and/or streptomycin. In another study, dietary cupric sulfate additions significantly (P<0.05) reduced the prophylactic efficacy of three phenylarsonic acid compounds against histomoniasis in young turkeys.Several non-arsonic acid compounds have proven effective for prevention and treatment of histomoniasis. Nifursol, 2-acetylamino-5-nitrothiazole and ipronidazole are three such compounds. Jungherr and Winn (1950), McGregor (1952) and Grumbles et al. (1952) have shown that 0.05 to 0.10 percent of 2-acetylamino-5-nitrothiazole in the diet would in most instances prevent histomoniasis lesions and mortality. The recommended level of 2-acetylamino-5-nitrothiazole for the prevention of…

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