Investigation Into Prevalece Of Escherichia coli Infection And Some Other Diseases In Broiler Farms In Sulaimani District Jalal M. Shareef and Nahla M. Saeed

Abstract

In regard to broiler diseases in Sulaimani district, different factors like
environmental temperature, humidity, wind velocity, the source of hatchery eggs
and day-old chicks were studied. The study involved the history, some
concurrent diseases, methods of protection against viral diseases, clinical signs,
post mortem lesions, isolation and identification methods (cultural and
biochemical) and sensitivity test. The 4th and 5th weeks ages were the
exposed ages for respiratory diseases, precisely Escherichia coli infection. The
temperature factor (high and low) was among the most prominent predisposing
factors, since 39% and 30% of E.coli isolates obtained through winter and
summer seasons successively. The low environmental temperature (5.2˚C)
accompanied by high humidity rate (72.3 %), caused high number of infections.
The high temperature (32.6 ˚C), with lower rate of humidity (26.2%); has also
increased the number of infections. Field investigation including 12 months
survey was conducted in the present work. The survey involved 1256 batches
from broiler farms, which involved (11,564,385) chicks. A total of 946 (75%)
batches showed respiratory signs, including 709 E.coli infected batches. Other
infections by Salmonella and Proteus were also discovered. The sensitivity
test of 200 E.coli isolates revealed that 165, 156 and 118 isolates were sensitive
to ciprofloxacine, gentamycin and chloromphenecol respectively. While 182,
181, and 175 isolates were resistant to flumequine, ampcillin and lincomycin
consecutively.