Padronizacão da técnica de imunoistoquímica para o diagnóstico etiológico de rotina da diarréia bovina a vírus / Bovine viral diarrhea diagnostic: immunohistochemistry standardization for routine

The immunohistochemistry standardization for bovine viral diarrhea virus (BVDV) diagnostic was described. The formalin-fixed tissue samples from a heifer with mucosal disease were used as positive control. The validation of the first phase results was performed using samples from an aborted fetus and a calf infected with reference strains of BVDV. The best results were seen using monoclonal antibodies and a commercial kit consisting of labelled streptavidin biotin (LSAB) reagents and the diaminobenzidine (DAB) substrate-chromogen reagent. The immunohistochemistry demonstrated to be an useful method for routine diagnosis for the controll and detection of BVDV infection.