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An indirect enzyme-linked immunosorbent assay was developed to detect antigen-specific secretory IgA antibodies to Campylobacter fetus subsp. venerealis in bovine vaginal mucus with a protein extract of the Campylobacter fetus subsp. venerealis by the acid glycine extraction method. Mean optical density measurement (&#955;=450 nm) was 0.143±0.9. The most immunoreactive protein bands of the Campylobacter fetus subsp. venerealis or Campylobacter fetus subsp. fetus recognized by IgA in immunoblotting, using bovine vaginal mucus samples, migrate at 42.6 kDa. The protein that migrates at 93 kDa was recognized exclusively for C. fetus subsp. venerealis. A positive vaginal mucus sample of a cow from negative herd recognized antigens of C. jejuni subsp. jejuni e C. fetus subsp. fetus. Foi padronizado um ensaio imunoenzimático do tipo indireto para detecção de imunoglobulina A (ELISA IgA) anti- Campylobacter fetus subp. venerealis em muco cérvico- vaginal bovino utilizando um extrato protéico de Campylobacter fetus subsp. venerealis produzido pelo método de extração ácida pelo tampão de glicina (0,2M; pH2,2). A média dos valores de densidade ótica (DO450) foi de 0,143±0,09. As bandas protéicas dos antígenos de Campylobacter fetus subsp. venerealis e de Campylobacter fetus subsp. fetus melhor reconhecidas pela IgA do muco cérvico- vaginal migraram em 42,6 kDa mas a proteina evidenciada em 93 kDa foi reconhecida exclusivamente pelo Campylobacter fetus subsp. venerealis. Os anticorpos presentes na amostra de muco vaginal testada no "immunoblotting" que apresentou resultado positivo no ELISA IgA, reconheceu antígenos de C. jejuni subsp. jejuni e C. fetus subsp. fetus

pesquisa veterinária brasileira

The use of enzyme-linked immunosorbent assay and immunoblotting for the detection of Campylobacter fetus immunoglobulins in the cervico-vaginal mucus of female cattle