Successful treatment of mycoplasmosis in layer chickens with single dose therapy [Mycoplasma gallisepticum]
1992
Arzey, G.G. (New South Wales Agriculture, Windsor (Australia)) | Arzey, K.E. (New South Wales Agriculture, Camden (Australia). Elizabeth Macarthur Agricultural Inst.)
The efficacy of treatment with single dose administration of 5 drugs at different dosages to layer hens naturally infected with Mycoplasma gallisepticum was studied. The drugs were tiamulin, which was administered orally, tylosin (parenterally and orally), spiramycin (orally), long-acting oxytetracycline (parenterally) and tylosin-dihydrostreptomycin (parenterally). Cure was assessed by the absence of nasal discharge. The cure rate was significantly higher in treated hens than in untreated hens, as early as 1 day after treatment. Remission for 33 days was achieved in 60 percent of hens treated with 100 mg oxytetracycline, in 100 percent of hens treated with 100 mg or 200 mg spiramycin, in 92 and 85 percent of hens treated with 100 mg tylosin, parenterally and orally, and in 89 and 88 percent of birds given 100 mg tiamulin and tylosin-dihydrostreptomycin, respectively.
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