Aspectos clínicos, patológicos e epidemiológicos de doenças imunossupressoras em aves

Abstract

The intensification of poultry associated with environmental conditions and management practices stressful, often does not provide effective control strategies against pathogens and are responsible for increasing health challenges. The response of the immune system is highly organized and loss of regulatory control often results in immunosuppression. Immunosuppressive diseases resulting from this process has significant economic importance in poultry production business. Thus, economic losses resulting from the exposure of birds to these agents trigger losses on the performance and increase susceptibility to secondary infections. Among the agents that induce stress in birds there are the environmental conditions to which the birds are subjected to environments farms. And in the case of diseases, the most prominent as immunosuppressants are: Marek's disease, hemorrhagic enteritis, malabsorption syndrome, turkey rhinotracheitis, swollen head syndrome, Newcastle disease, chicken anemia and infectious bursal disease. These aggravate the disease and may occur sequentially or simultaneously. May also be present and cause considerable mortality or present only subclinical disease or be worsened by secondary diseases. Regardless of the presentation of the disease, the same result in a consequent increase in economic losses. And it is precisely for this reason that the prevention and control of immunosuppressive diseases is important and should be done to enable the industrial creations.