DOSE TITRATION STUDY OF ENROFLOXACIN (BAYTRIL(R)) AGAINST RESPIRATORYCOLIBACILLOSIS IN MUSCOVY DUCKS

Four-week-old specific-pathogen-free Muscovy ducks were inoculated wit h reovirus. One week later, they were inoculated intratracheally with a O78:K80 strain of Escherichia coli. The next day, they were given en rofloxacin at different doses in the drinking water. Comparison of mor tality rates, weight gain, macroscopic lesions, and E. coli re-isolati ons among treated and untreated birds showed that a 5-day treatment co urse with 12.5 or 25 ppm enrofloxacin in water for 4 hours in the morn ing provided good therapeutic efficacy against respiratory colibacillo sis.