RESULTS
Symptoms and Growth Performance: Chicks of the
control and E. coli infected groups, which, were
supplemented with olive leaves, or levamisole did not
have clinical signs of disease or abnormal behavior,
whereas E. coli infected chicks were listless, had rough
feathers with high mortality rate (18%). The mortality rate
of the control group was 2% while it was 8% for those
treated with olive leaves or levamisole. On postmortem
examination, chicks infected with E. coli showed
congestion of the intestine, liver and spleen.
Experimental groups infected with E. coli were
significantly smaller in their body weights than that of the
control all over the experimental period (Table1). However,
the body weight of the experimental groups supplemented
with olive leaves or levamisole showed significant
increase when compared with E. coli infected group.