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Non-human salmonella isolates 2020

05 January 2020

Consumer safety
Animal testing
Food environmental 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.

Click to download the isolates data below, or scroll to read the monthly summaries.

Annual summary 2020

The Enteric Reference Laboratory confirmed 833 non-human Salmonella isolates in 2020 compared with 926 in 2019.
There was a decrease in the number of:

  • S. Bovismorbificans (309 in 2019 vs. 247 in 2020);
  • S. Brandenburg (133 in 2019 vs. 91 in 2020);
  • S. Hindmarsh (28 in 2019 vs. 8 in 2020);
  • S. Mbandaka (16 in 2019 vs. 7 in 2020);
  • S. Saintpaul (14 in 2019 vs. 8 in 2020);

 There was an increase in the number of:

  • S. Give (12 in 2019 vs. 78 in 2020);
  • S. Typhimurium (320 in 2019 vs. 336 in 2020);

No phage typing was undertaken in 2020. When requested Typhimurium and Enteritidis isolates were instead analysed using whole genome sequencing (WGS) and individual reports only showed the serotype and the Achtman 7-gene ST type – which does not discriminate to a fine level within a serotype. Subsequent to the introduction of WGS, Salmonella Subsp. (I) ser. 4,5,12 : i : - is being reported as monophasic Salmonella Typhimurium.