Studies on Bovine Tuberculosis in the Australian Environment

The Accuracy of Diagnostic Methods Used in the Detection of Tuberculous Cattle

“…In these trials the proportion of N.V.L. reactors was not excessive but it is probable, as shown by Gregory (1949), that the tuberculin used a t that time was less potent than the C.S.L. intsadermal tuberculin used at present; therefore, a higher proportion in more recent tests might be expected.…”