Tuberculosis in New Zealand: Annual Report 2018

Thursday 7th July 2022


Summary

This report describes the epidemiology of tuberculosis in New Zealand for 2018 as well as trends during the past 5–10 years.

Tuberculosis disease (TB) is a notifiable condition in New Zealand. The TB notification rate has been relatively stable since 2007 apart from a small decrease recorded in 2013. The 2018 TB notification rate was 6.3 per 100,000 population (307 cases). The majority of TB notifications were for new disease, with relapse/reactivation cases making up a small number of notifications. A high proportion of TB cases (88.9%) were laboratory confirmed. No TB outbreaks were reported in 2018.

The highest notification rates in 2018 were recorded for Counties Manukau, followed by Capital & Coast and Waitemata DHBs.

Between 2014 and 2018, there was a similar pattern in the demography among new TB cases. Rates were higher in males than females, especially those aged 15–39 years. Over the past 5 years, the Asian ethnic group has consistently experienced the highest notification rates.

As in previous years (2009–2017), higher rates of TB occurred in socioeconomically deprived areas. Not being born in New Zealand and living with a person not born in New Zealand have consistently been dominant risk factors.

Two (1.9%) of the culture-positive TB cases reported in 2018 were multidrug-resistant TB (MDR-TB, defined as resistance to at least isoniazid and rifampicin). Both MDR-TB cases were born overseas. Resistance to isoniazid, rifampicin, ethambutol and streptomycin was higher among isolates from cases born overseas than among isolates from New Zealand-born cases, but only isoniazid (p=0.029) and streptomycin (p=0.018) resistance were significantly higher.

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Report:

Tuberculosis in New Zealand: Annual Report 2018

 

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Tuberculosis in New Zealand: Annual Report 2018

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