Staining pattern of mycobacterial cell membrane (Mce1A) and somatic (MPT57 and Hsp65) antigens in lymph nodes tissues infected with
, as detected by immunohistochemical staining. The areas marked in the left column panels are shown in higher magnification in the right column panels. Mce1A and Hsp65 was stained strongly in epithelioid cells and multinucleated giant cells, while the staining intensity of MPT 57 was weaker in these cells. Mce1A was not detected in the necrotic centres. NC = necrotic centres.