| spectrum of immune reactivity to mycobacterial (bcg) antigens in healthy hospital contacts in south india. | in an effort to study the immunological responses to antigens of tubercle bacilli, 49 tuberculin positive and 41 tuberculin negative hospital contacts aged 20-29 years (staff nurses and students working in government rajaji hospital, madurai, south india) were studied for serum antibodies (igg, igm and iga classes) to bcg by elisa and diameter of induration to ppd by mantoux procedures. the two immunological parameters were correlated in regression analysis. the results have revealed higher anti ... | 1991 | 1949216 |