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Summaries
January
The number of isolates (n=131) confirmed this month showed an increase in comparison to the number of isolates confirmed in January 2024 (n=83). Salmonella Typhimurium ST19 and Typhimurium ST568 (18.1% and 6.2% in 2024 vs 19% in 2024) were the most common serotypes confirmed this month.
February
The number of isolates (n=81) confirmed this month showed a decrease in comparison to the number of isolates confirmed in February 2024 (n=86). Salmonella Typhimurium ST19 (27.9% in 2024 vs 17.3% in 2025) was the most common serotype confirmed this month. Uncommon Salmonella serotype confirmed this month was S. Indiana (16 human isolates since it was first confirmed in New Zealand in 1990)
March
The number of isolates (n=83) confirmed this month showed a slight decrease in comparison to the number of isolates confirmed in March 2024 (n=87). Salmonella Typhimurium ST19 (13.8% in 2024 vs 25.3% in 2025) was the most common serotypes confirmed this month.