Carla D. Marassi, Jim McNair, John Pollock, Paula Ristow, Leila S. Fonseca, Walter M.R. Oelemann, Walter Lilenbaum
In order to demonstrate the potential to distinguish paratuberculosis (PTB) from bovine tuberculosis infection (TB), ELISAs with M. bovis-specific MPB70 or MPB83 as capture antigens were developed and tested on two groups of cattle: Group A comprised 23 animals positive for Mycobacterium avium paratuberculosis (Map) and TB free. Group B comprised 48 animals from a Map free herd during the previous 5 years, but confirmed as tuberculous by positive results on PPD testing and M. bovis culture. Results demonstrated a significant difference (p < 0.01) between reactivity of sera from these groups, encouraging the study of purified proteins to differentiate between both diseases.
Keywords: Johne's disease; Paratuberculosis; Bovine tuberculosis; MPB70; MPB83; ELISA