Fig. 1From: The isolation and molecular characterization of Mycobacterium avium subsp. paratuberculosis in Shandong province, ChinaZiehl–Neelsen staining for bacilli. a Faecal samples showing positive for Ziehl–Neelsen stain (arrow). b Milk samples showing positive for acid-fast staining (arrows). c Ziehl–Neelsen stained impression smears of the mesenteric lymph nodes showed large numbers of acid-fast bacilli (arrows). d Large numbers of clustered acid-fast bacilli were observed in the smears taken from a purified colony (arrows)Back to article page