Human Salmonella Isolates, 2013 No. 8, August
Wednesday 22nd March 2023
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Summary
The number of isolates this month (n=93) is the same as the number of isolates confirmed in August 2012. Salmonella Typhimurium phage type 56 variant (17.2% in August 2012 and 20.4% in August 2013) was the predominant serotype. The S. Typhimurium phage type 56 variant was known as S. Typhimurium phage type RDNC-May06 prior to July 2013. Further characterisation work undertaken by the Salmonella Reference Unit at Colindale (Public Health England) identified this phage type as 56 variant.Salmonella Enteritidis phage type 59 was confirmed for the first time in New Zealand from a case who had recently travelled to Bali.
Increase in Salmonella Brandenburg
There was an increase in the number of S. Brandenburg isolates (4 in August 2012 versus 10 in August 2013) this month. Occurrence of S. Brandenburg infection in humans is a seasonal phenomenon in the southern half of the South Island (Baker et al Epidemiol Infect 2007; 135:76-83) and is often linked with occurrence of the serotype in livestock. Salmonella Brandenburg has caused periodic epidemics of disease in sheep flocks in Otago and Southland since 1997.
See also: http://www.stuff.co.nz/business/farming/sheep/9090477/Bacterial-outbreak-killing-South-Island-sheep
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