HEAL ▶▶▶TH
Gumboro disease control improves processing results
Gumboro disease, also known as infectious bursal disease (IBD), can present in clinical or subclinical forms. And its effects can impact results in the field, as well as the processing of broiler carcasses in the slaughterhouse. A well designed and executed vaccination strategy can control Gumboro and improve both field and processing results.
BY MARCO AURÉLIO ELMER LOPES, JOSÉ MAURÍCIO FRANÇA AND HIGOR COTTA, CEVA W 26
hen the subclinical form of Gumboro disease is detected this means that chickens have been infected by the field virus due to vacci- nation failure. Although the presence of the
disease may not necessarily cause an immediately observable negative effect, the field virus will have the opportunity to multiply, produce variants and spread, leading to impacts that will undermine the future sanitary or economic perfor- mance of the poultry house or farm. In terms of growth and economic results, it has been shown that Gumboro disease can impact production performance in the field, as well the processing of broiler carcasses, thereby adversely affecting production costs and profitability. In the field the disease has a negative effect on feed conversion, mortality, bodyweight
▶ POULTRY WORLD | No. 2, 2021
gain, medication use, as well as health and sanitation costs. In the processing facility Gumboro results in reduced flock uni- formity, more condemnations, lower line speeds, lower carcass yields and reduced profitability. In its most common form Gumboro disease is referred to as ‘sub-clinical’ in which the clinical signs are not perceptible. It is crucial at this stage to monitor all the links in the produc- tion chain, from hatchery to slaughterhouse. In this context, Ceva Transmune offers a viable protective solution capable of halting the Gumboro cycle while not impacting performance results. Some publications have shown that sub-clinical Gum- boro infections in the slaughterhouse have led to production cost increases in excess of 10% in the US, increased hepatic lesions and condemnations in the slaughterhouse in Canada and (also in Canada) a 1.6 greater risk of developing E. coli septicemia with an existing subclinical IBD infection.
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