Elisa proteína-G para o diagnóstico de agalaxia contagiosa dos ovinos e caprinos

Abstract

The contagious agalactia of ovine and caprine (CAOC) is characterized by a decline and subsequent failure of milk production, arthritis and keratoconjunctivitis causing economic losses in dairy goats and sheep herds. Classic diagnostic is performed by culture and identification of mycoplasmas species. The utilization only of this method to diagnostic has contribute for dissemination of infection and reduced efficiency of the controls measures because your necessity of long time to the diagnostic conclusion. The objective this study was performed and standardized an indirect ELISA using conjugate with protein-G (ELISA-G) and two types of obtained by growth of M. agalactiae antigen. Whole bacterial and sonicated culture was used as antigen to sensibility on microtitre plates. A total of 46 serum sample were obtained in infected goat herd with clinical signs in forty-five period and 40 samples in free herds of disease to standardization and application of ELISA test. The infection status was confirmed by culture of M. agalactiae from milk. Do not had statistical difference between positive and negative controls serum (P/N) when whole or sonicated antigen wereused. The sensibility of ELISA-Gt and ELISA-Gs were of 77,27% and 88,63%, respectively. Specificity were 95,24% for both ELISA. In conclusions, the indirect ELISA-Gt or ELISA-Gs should be utilized as tools for diagnostic of contagious agalactia in goats.