bacterial diseases of poultry
aclear example of poultry disease hinder satisfying poultry production is collibacillosis
This is the localized or systemic infection caused by avian pathogenic Escherichia Coli (APEC). It manifests in diverse ways such as acute fata septicemia, subacute pericarditis, airsaculitis, salpingitis/ peritonitis, cellulitis and lymphocytic depletion of bursa and thymus.
This infection is seen worldwide in chickens, turkeys, etc. Morbidity varies, mortality is 5-20%. The infectious agent is moderately resistant in the environment, but is susceptible to disinfectants and to temperature of 80*c.
ECONOMIC IMPORTANCE OF COLIBACCILOSIS
Colibacillosis causes elevated morbidity and mortality leading to economic losses in the poultry farms especially around the peak of egg production, reduced FCR and carcass condemnation at processing in broilers.
In Layers
There is sudden mortality with the absence of typical clinical signs due to the stress factors associated with egg production and systemically accompany by decrease in egg production and increase of poor-quality eggs.
In Breeders
When contamination of eggs with E. Coli lead to decrease hatchability and when there is in ovo contamination during incubation of eggs, this will also lead to production of poor-quality chicks with poor livability.
In Broilers
When there is systemic infection, this will lead to poor FCR (feed conversion ratio) and increased mortality, skin infection will cause inflammation of subcutaneous tissue which will lead increase condemnation of carcass at processing level.
in 9 section I discuss the most important bacterial diseases affect poultry
section 1 introduction
section 2 how to investigate afield problem
section3 disease survailance necropsy - lab dignosis
section4 chalamidiosis the most important zoonotic disease
section5 infectious coryza
section6 salmonolosis
section 7 fowl cholera
section8 mycoplasmosis
section9 colibacillsis
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