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Abstract
In recent years great extension was achieved in poultry industry in Egypt, many farms were constructed but most of them not consider the hygienic rules either in construction or breeding system and this leads to enhancement of many avian pathogens. Bacterial pathogens are affecting poultry industry causing many important and dangerous threats such as colibacillosis and/or salmonellosis and many other disease syndromes.
This study was carried out to study some epidemiological aspects of some bacterial pathogens isolated from some poultry farms. A total of 640 different environmental samples
from air, water, litter and feed (320 samples /season) were collected from 4 poultry farms (2 broiler and 2 layers) in Behera Province in order to determine the possible sources of
bacterial pathogens in these farms and to determine the role of environment in the causation of diseases in both winter and summer seasons.
1. Bacterial pathogens isolated from poultry environment.
1.1. Bacterial pathogens isolated from air:
1.1.1. Incidence of bacterial pathogens isolated from air samples with regard to the type of farm production.
The results revealed isolation of E. coli (12.5 %), Salmonella spp. (6.3 %), Proteus spp. (3.8 %), Ps. aeruginosa. (13.8 %) and K pneumonae (1.3 %) from broiler farms and the isolation of E. coli (23.8 %), Salmonella spp. (12.5 %), Proteus spp. (3.8%), Ps. aeruginosa (7.5 %), K pneumonae (7.5 %), Staph. aureus (6.3 %) and Streptococcus spp. (5 %) from layers farms.
1.1.2. Incidence of bacterial pathogens isolated from air samples with regard to the season of the year.
The results revealed isolation of E. coli (13.8 %), Salmonella spp. (8.8 %), Proteus spp. (5 %), Ps. aeruginosa (8.8 %), K pneumonae (3.8 %), Staph. spp. (1.3 %) and Streptococcus spp. (2.5 %) in winter season and the isolation of E. coli (22.5 %), Salmonella spp. (10 %), Proteus spp. (2.5 %), Ps. aeruginosa. (12.5 %), K pneumonae (5 %), Staph. aureus (5 %) and Streptococcus spp. (2.5 %) in summer season.