Fig. 5

Histopathology of the jejunum (Left: HE staining of the jejunal submucosa showing infiltration of numerous lymphocytes and epithelioid macrophages; Middle: HE staining of the jejunal lamina propria of sheep no. 5 showing granuloma formation with fibrosis; Right: Ziehl–Neelsen acid-fast staining of the jejunal lamina propria showing epithelioid macrophages containing abundant intracellular acid-fast bacilli [AFB] (red arrow))