Abstract
THE anticoccidial activity of nitrofurazone was first reported by Harwood et al. (1947). Harwood and Stunz (1949a, b, 1950) demonstrated that extremely low dosages of nitrofurazone were effective in controlling Eimeria tenella infections in chickens, without growth retardation; that continuous medication at 0.0067% concentration in feed reduced the mortality rate of birds infected with E. tenella, and that 0.0055% level in feed was effective in treating cecal coccidiosis. Foster (1951) recommended nitrofurazone at concentrations ranging from 0.0055% to 0.0069% in feed for the prevention of coccidiosis, and prescribed 0.011% in feed for 4 or 5 days to treat coccidial outbreaks. Horton-Smith and Long (1952) reported that 0.022% nitrofurazone in feed controlled established infections of cecal coccidiosis in chickens and emphasized the prophylactic value of 0.011%.Birds with acute coccidiosis cease to eat, but continue to drink. During this phase, medication in drinking water may protect birds harboring developmental stages of …
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