Human Salmonella Isolates, 2011 No. 4, April

Monday 23rd September 2019


Summary

The number of isolates (n=122) showed an increase in comparison with April 2010 (n = 85). Salmonella Typhimurium phage type 135 (0% in April 2010, 16% in April 2011) was the predominant serotype. Uncommon New Zealand serotypes identified this month included S. Typhimurium phage type 191 (6 human isolates since 2002) and S. Haifa (8 human isolates since 2002).
The proportion of Salmonella Typhimurium phage type 135 (STM135) among human Salmonella isolates typed by the Enteric Reference Laboratory (ERL) increased from 1.7% in 2009 to 4% in 2010. Of the 15 non-human STM135 isolates typed by ERL during 2010, 87% (13) came from bovine sources, one from a feline source, and the source of the last isolate was not specified. Two non-human isolates have been typed in 2011 to date, one from a bovine source and the other from a feline source.
In New Zealand, STM135 was the most common serotype of Salmonella identified by the ERL in the late 1990s until 2001 when S. Typhimurium phage type 160 took over as the predominant circulating strain.
Outbreaks of STM135 infections in Australia have been associated with the consumption of chicken and raw egg products

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Human Salmonella Isolates, 2011 No. 4, April

 

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Human Salmonella Isolates, 2011 No. 4, April

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