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Summaries
January
The number of isolates (n=110) confirmed this month showed a decrease in comparison to the number of isolates confirmed in January 2025 (n=131). Salmonella Typhimurium ST19 (19% in 2025 vs 34.5% in 2026) was the most common serotype confirmed this month.
February
The number of isolates (n=101) confirmed this month showed an increase in comparison to the number of isolates confirmed in February 2025 (n=81). Salmonella Typhimurium ST19 (17.3% in 2025 vs 22.8% in 2026) was the most common serotype confirmed this month.
Uncommon Salmonella serotypes confirmed this month were S. Goldcoast (5 human isolates since it was first confirmed in New Zealand in 1989) and S. Itami (6 human isolates since it was first confirmed in New Zealand in 2009)
March
The number of isolates (n=76) confirmed this month showed a slight increase in comparison to the number of isolates confirmed in March 2025 (n=83). Salmonella Typhimurium ST19 (25.3% in 2025 vs 27.6% in 2026) was the most common serotypes confirmed this month.
Uncommon Salmonella serotypes confirmed this month were S. Molade (4 human isolates since it was first confirmed in New Zealand in 2009) and S. Muenster (21 human isolates since it was first confirmed in New Zealand in 1994)