Prevalência de micoplasmose em galinhas caipiras e a proximidade com a avicultura industrial

Abstract

The avian mycoplasmoses are important diseases in the industrial poultry breeding, because they are causes of great economic losses. However, little is known about the prevalence of these diseases in the raising of hens. Backyard poultry are usually raised with low sanitary status and pose a potential risk to industrial breeding since subsistence poultry usually has low biosafety level. This project aimed to evaluate the seroprevalence of avian mycoplasmosis that affect the birds of the region of Uberlândia-MG. In addition, to correlate seroprevalence and clinical symptoms, to evaluate the correlation between the ELISA and HI test, and to relate the proximity of seropositive sites and the poultry industry. 200 sera of backyard poultry located in different properties of the city of Uberlândia were evaluated by ELISA method for M. gallisepticum and M. synoviae. Eight properties were also assessed by the HI method and evaluation of suggestive clinical symptomatology for diseases. The results indicated the presence of high serological titers for MG and MS, correlating with the clinical and MG symptomatology. It has also been shown that there is low agreement between the ELISA and HI tests, and the ELISA showed low specificity and false positive results. This work showed that MG causes losses in backyard poultry which may be a potential risk factor for the local poultry industry. It also showed that the HI test should not be replaced by ELISA.