Tuberculosis in New Zealand: Annual Report 2011

Friday 28th January 2022


There were 626 cases of tuberculosis (TB) notified in 2011. These notifications comprised 308 cases of TB disease (new and relapse/reactivation cases) and 318 cases of TB infection (treatment of latent infection and old disease on preventive treatment). Annual TB disease notification rates have more than halved between 1980 (15.1 per 100 000 population) and 2011 (7.0 per 100 000 population), although there has been little change in rates over the last five years.

Disease notification rates in 2011 were highest in those aged 20 to 29 years and in the Middle Eastern/Latin American/African ethnic group. More than half of the disease notifications were reported by the three District Health Boards (DHBs) in the Auckland region. The highest rates of TB disease were in Auckland DHB, followed by Capital and Coast and Hawke's Bay DHBs.

Over three-quarters of the TB disease notifications in 2011 were culture positive, and all were due to Mycobacterium tuberculosis.

Of the 232 culture-positive cases due to M. tuberculosis  in 2011, 78 had a non-unique molecular type. These cases were associated with 41 separate molecular types. The remaining 154 cases had a unique molecular type.

Over the last 10 years, there has been a significant trend of decreasing resistance to ethambutol and pyrazinamide. In 2011, there were two (0.9%) cases of multidrug-resistant TB (MDR-TB). A total of 30 MDR-TB cases have been identified during the last 10 years, and all but two are assumed to have acquired their MDR-TB overseas.

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Tuberculosis in New Zealand: Annual Report 2011



Tuberculosis in New Zealand: Annual Report 2011

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