الفهرس 
IntroductionOnly 14 pages are availabe for public view
 |  | from | 189 |  |  |
| | | from | 189 | | |
Abstract
The present study was performed to investigate the
clinicopathological changes associated with acute and chronic heat
exposure in chickens. One hundred one day old Hubbard chicks
were used for this experiment. They divided into five equal groups.
The first gp. kept as negative control (non treated non heat
stressed), gp. (2) were exposed to 42±l QC for 3 hrs. with RH. 45-
60% at 45 days old, gp. (3) were treated with Anti heat stressl
gmIliter water orally 24hrs. before heat exposure and exposed to
42±1 QC for 3hrs with RH. 45-60%. at 45 days old, gp. (4) were
exposed to 39±1 QC for 6 hrs. for 3 successive days with RH. 45-
60%. at 43, 44 and45 days old while gp. (5) were treated with Anti
heat stressl gmlliter water orally 24hrs. before heat exposure and
exposed to 39±1 QC for 6 hrs. for 3 successive days with RH. 45-
60%. at 43, 44 and 45 days old.
Clinical signs was observed. Blood and serum samples were
collected at the same time (0, 12 and 36 hrs. after heat exposure) for
hematological and clinicobiochemical studies. Tissue specimen
from liver, kidneys, lung and heart from all gps. were examined
macroscopically and microscopically.
Chickens exposed to acute and chronic heat exposure (gps. 2
and 4) were standing with wings outstretching, off food, panting
(open mouth breathing) and laying on the ground during periods of
exposure with mortality rate reached 20% in acute exposure. Gps.
(3 and 5) exposed to acute and chronic heat exposure and treated
with no-heat stress) showed some improvement in the clinical signs.