Fig. 8
Number of tuberculosis primary case1 herds in each Australian State from 1993 to 2009. Compiled using data from [13] and data supplied by John Roberts from the national TB case register
1 Primary cases were defined as those detected in case herds. This means a herd in which a case of tuberculosis wasfound, that was previously tested Negative, Monitored Negative or Confirmed Free
A secondary case herd was defined as a herd found to be infected with tuberculosis following tracing from a Case Herd. During the same period (1993-2009) there were 11 secondary case herds
2 These were two primary cases in adjoining, managed buffalo herds in 2002 in the Northern Territory. Both were found to be residual infection in old cows, with no further infection detected
3 One of these two cases did not fully meet the definition of a primary case, as it was detected in secondary case herds after the original herd had been fully dispersed and no longer existed. However, it is listed here for completeness. The last TB detection in cattle in 2002 was in a secondary case herd associated with this case