Bacteriological study of caseous lymphadenitis in pre-scapular lymph nodes of sheep slaughtered in Urmia, northwestern Iran

To identify the causative agent of caseous lymphadenitis in pre-scapular lymph nodes of sheep, the contents of 98 pre-scapular lymph nodes which showed the gross changes compatible with lymphadenitis were cultured. Bacteria isolated included Corynebacterium pseudotuberculosis [79.3%], Arcanobacterium pyogenes [9.4%], Staphylococcus aureus [7.5%] and Streptococcus alphahemolytica [3.8%]. It was shown that Corynebacterium pseudotubercolosis is the main causative agent for lymphadenitis in northwestern Iran