| Abstract: |
The objective of this study was to Isolate, identify, and characterizethe most prevalent serotypes of P. multocida, causing duck choleraoutbreak at major farms in Egypt via biotyping, capsular Serotyping, andsomatic Serotyping and to compare them with the P. multocida strainsincorporating in fowl cholera vaccine.General epidemiological features were examined through the visits tothe large duck farms located as El-Behera, El-Garbia and El-Sharkia.Ducks with clinical symptoms of fowl cholera, and the carcass of deadducks were collected and delivered to the lab for bacterial isolation from,e.g., heart blood, liver, spleen, bone marrow, or lung. Out of the 128 ducks with clinical symptoms of fowl cholera or carcasses of ducks, suspected to be died from duck cholera, isolated from21 farms, 14 isolates suspected to be P. multocida could be obtained. Theaverage percentage of Pasteurella multocida isolation was 13.81 %. Thispercentage of isolation differed among samples examined from differentGovernorate. The highest percentage of isolation of the organism was inEl-Sharkia Governorate (8.57%) followed by El-Garbia Governorate(2.94%), then EI- Behera Governorate (2.3%). This findings reflect thewide spread of duck cholera in the different Governorates.The biochemical properties of the fourteen isolates suspected to be P.multocida were examined using a standard diagnosis method, proving that
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