BIO-X KIT ELISA CORONAVIRUS (BIO K 344) BIO 269 Perox Rabbit anti-Mouse Ig BIO K 266 Clostridium perfringens Alpha toxin antigen detection kit BIO K 267 Clostridium perfringens Beta toxin antigen detection kit BIO K 268 Clostridium perfringens Epsilon toxin antigen detection kit BIO K 269 Clostridium perfringens antigen detection kit