The New Zealand Institute for Public Health and Forensic Science (PHF Science) was formerly named The Institute of Environmental Science and Research (ESR).

Human salmonella isolates 2008

01 January 2008

Enteric reference testing

Please note: As of 1 July 2025, the New Zealand Institute for Public Health and Forensic Science (PHF Science) is the new name for the Institute of Environmental Science and Research (ESR). Research and reports published prior to this date may reference the organisation’s former name.

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Annual summary 2008

There were 1399 human Salmonella isolates confirmed in 2008 (2007 n= 1341). S. Typhimurium phage type 160 remains the predominant strain, representing 9.7% of total isolates (11.3% 2007). S. Typhimurium phage type 101 and S. Saintpaul have increased to 5% (3.2% 2007) and 2.5% (1.9% 2007) respectively.

There were three significant outbreaks:
S. Chester - 54 cases. The outbreak started in October 2007 with a total of 84 cases. No food source was linked to this outbreak.

S.Mbandaka - 36 cases. No food source was connected to the outbreak. The results of the case control study however suggested the consumption of chicken breast meat as a possible risk factor.

S. Typhimurium phage type 42 - 62 cases. The majority of these cases were connected to the consumption of raw flour. The same phage type was also isolated from bags of unopened flour and resulted in a voluntary withdrawal of the product by the manufacturer.