Tuberculosis in New Zealand: Annual Report 2012

Thursday 19th September 2019


Summary

The 2012 TB notification rate was 6.6 per 100 000 population. The vast majority of TB notifications were for new disease. Relapse/reactivation cases contributed sparingly to the notifications. A high proportion of TB cases were laboratory confirmed largely through positive culture for Mycobacterium tuberculosis complex (predominantly M. tuberculosis).

As in previous years, there were differences in new TB notification rates by all the demographic variables. Rates were higher in males compared with females, especially in the older age groups. The Asian and Middle Eastern/Latin American/African (MELAA) ethnic groups have consistently experienced the highest notification rates, although the number of MELAA cases remains relatively low.

Between 2003 and 2012, there have been significant trends of decreasing ethambutol resistance and pyrazinamide resistance, but no significant changes in resistance to isoniazid, rifampicin or streptomycin. There were four cases of multidrug-resistant tuberculosis (MDR-TB) in 2012, but none were identified as extensively drug-resistant tuberculosis (XDR-TB).

Around a third of M. tuberculosis isolates that underwent molecular typing between 2008 and 2012 had results that matched other typed isolates i.e. were non-unique and could be assigned to clusters. Most clusters contained a small number of cases (less than five).

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Tuberculosis in New Zealand: Annual Report 2012

 

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Tuberculosis in New Zealand: Annual Report 2012

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