Abstract
One hundred and three cats presenting with clinical signs of feline acute upper respiratory Infection were selected from Belgium, France and the Netherlands In a randomised comparative field trial. Each cat underwent a bacteriological examination before treatment (day 0) and received either marbofloxacin, at a dosage of 2 mg/kg once daily for five days, or amoxycillln‐clavulanic acid (ACA) at a dosage of 12·5 mg/kg twice dally for five days. Clinical examinations were performed on days 2, 5 and 14. Pasteurella species were cultured in one‐third of the samples. The other main bacteria isolated were Streptococcaceae, Enterobacterlaceae and Staphylococcaceae. Response rates (cures + improvements) to treatment on day 5 were 87·8 vs 77·8 per cent for marbofloxacin and ACA, respectively. A few mild side‐effects (diarrhoea, vomiting) were recorded with both drugs.