Twenty chicks at (45) days old were used and divided into two equal groups , one act as treatment (Baytril) dosed orally (10 mg/kg ) for 5 days, while the control group dosed with distilled water.
Duodenum was isolated in vi tro examined with autonomic agents.
The result showed significant decrease in intestinal motility between treatment and control group after addition of atropine, acetycholine, atropine flowed acetycholine and after addition propranolol and propranolol flowed adrenaline.
Concluded from this study that using of Enrofloxacin case a negative alteration tonic and rhythmic contraction of intestinal (smooth muscles).