الفهرس 
IntroductionOnly 14 pages are availabe for public view
 |  | from | 86 |  |  |
| | | from | 86 | | |
Abstract
Samples were obtained from 10 small scale commercial and 10 household’s backyard layers flocks from Kafrelsheikh Governorate. The prevalence rates of Salmonella spp in samples collected from commercial and backyard layers flocks were 2.5% (10/400) and 6% (6/100) for eggs samples and 7.1% (15/210) and 1.4% (1/70) for environmental samples, respectively.
The overall prevalence of Salmonella in collected samples was 4.1% for both production systems. The odds of Salmonella detection in commercial layers system was higher for environmental samples (OR 5.3) but lower for eggs samples (OR 0.4) compared to backyard layers system, however these associations were not significant (P= 0.09 – 0.1)
Six out of 10 examined commercial flock (60%) harbored at least one Salmonella isolate, while it was detected in three of backyard layers flocks (30%). There was a positive correlation between egg shell contamination and Salmonella detection in egg cartoon trays in commercial layers farms (Pearson’s R= 0.8, P= 0.004). No other association was found with rest of environmental samples in commercial farms. Also no association was detected between shell contamination and environmental samples in backyard flocks.