Annual Summary of Outbreaks in New Zealand, 2011

Wednesday 29th September 2021

Summary of outbreaks in 2011

There were 581 outbreaks reported during 2011 involving 7796 cases. A total of 204 cases required hospitalisation and four cases died.

The highest number of outbreaks was reported by Auckland Public Health Unit, which represented 29.3% of all outbreaks in 2011.

The causal agent (pathogen, toxin or chemical) was identified in 73.3% of outbreaks.

Enteric agents were implicated in 94.0% of outbreaks. The most commonly identified pathogen was norovirus, followed by Giardia spp., Campylobacter spp., and Cryptosporidium spp. The most commonly implicated non-enteric agent was Bordetella pertussis.

The most common settings where exposure to or transmission of causal agents occurred were the private home environment and long-term care facilities.

Person-to-person transmission was reported for 78.0% of outbreaks in 2011. Multiple modes of transmission were implicated in 33.0% of outbreaks.

The most commonly implicated food types in outbreaks associated with a foodborne mode of transmission were shellfish, followed by fish and poultry.

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Annual Summary of Outbreaks in New Zealand, 2011



Annual Summary of Outbreaks in New Zealand, 2011

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