الفهرس 
Review of literatureOnly 14 pages are availabe for public view
 |  | from | 159 |  |  |
| | | from | 159 | | |
Abstract
A total of 595 random samples including (swabs, muscles and
skin) were taken from seventy broiler carcasses, via different
processing stages and finished product, collected from two processing
plants of different levels of hygienes mainly plant I (automatic
system) and plant II(manual or prmitive system).
All samples were subjected to bacteriological examination. The
obtained results revealed the following:
Isolation and count of S. aureus from processing stages
and finished product:
1- The incidence of S.aureus isolated from swabs of vent and skin
flap of neck taken from plant I was (34.28%), (51.42%), and
(51.42%), (57.14%), from live birds and slaughtered chicken,
respectively.
2- The incidence of8.aureus isolated from swabs of vent and skin
flap of neck takeu from plant II was (40010),(57.14%) and
(51.42%), (62.85%) from live birds and slaughtered chicken,
respectively.
3- The incidence of 8.aureus isolated from processing stages of
plant I which conItituted (SA Def), (SAW.) and (SACh)
was (62.85%), (62.15%) and (68.57%), respectively.
4- The incidence of S.aureus isolated from processing stages
of plant IT whida constituted (S.A. Det) and (S.A.W) was
(68.57%) in both. the chilling stage was not envolved in plant IT.
5- The incidence of S.aureus isolated from skin and muscles of
finished product in plant I was (68.57%) and (45.71%),
respectively.
6- The incidence of S.aureus isolated from skin and muscles of
finished product in plant II was (85.71%) and (74.28%),
respectively.
7- The log means of total S.aureus count /cm2 of the examined
broiler swab samples taken from (A. Def), (A.W) and (A.ch)
stages were (2.395), (2.012) and (2.313), respectively.
8- The log means of total Siaureus count /cm2 of the examined
broiler swab samples taken from (A. Det), (A.W) stages in plant
II were (2.933) and (2.451), respectively.
9- The log means of total S.aureus count from examined broiler
samples (skin/em’ and muscle/g) of plant I were (2.579)and
(1.798), respectively.
10- The log means of total S.aureus count from examined broiler
samples (skin/cm2, and muscle/g) of plant II were (3.875%) and
(2.489), respectively.
Biotyping of the isolated strains from proscessing stages
and finished product.
Enterotoxigenicity of isolated S.aureus strains from
finished product revealed that.
A- Twenty-four strains of S.aureus isolated from finished product
from plant I were examined for enterotoxigenicity and 13
(54.16%) of them were positive for toxin production and
identified as follows:
2 strains type (A) , 4 (C), 2 (D) as single producer and one
strain from each of(A+B), (A+C), (A+D), (B+C) and (A+C+D)
as multiple produces.
B- Thirty strains of S.aureus isolated from fmished product from
plant II were examined for enterotoxigenicity and 26 (86.7%) of
them were positive for toxin production and identified as
follows:
S strains type (A) 4 type (B) one strain type (C) and 8 strains
type D as single producer strains and 3 strain produced
(A+C+D) and 2 strains produced (B+C) beside 3 strains
produced (A+B+D). (C+D), (A+D).
Enterotoxins A and D were completely inactivated after
autoclaving (30 minutes) and roasting (30 minutes) while
boiling (30 minutes) had no effect on the stability of
Enterotoxins and fiying had a little effect.