Background: Salmonella enterica subsp. enterica serovar Chester (antigenic formula: 1,4,[5],12:e,h: e,n,x:) is a serovar of the O:4 (B) serogroup. Serovar Chester is a rare serovar worldwide; in the US during 2001-2011, only 403 human cases have been reported. In addition, animal and food surveillance have not found S. Chester in these sources in the US. A recent recall of fish meal feed materials from Morocco was conducted in the EU.
Animal reservoir: There is not clear evidence of the animal reservoir for this serovar.
Geographical distribution: S. Chester have been reported from different regions, including countries in North (US, Canada) and South America (Brazil), Morocco and Australia.
Outbreaks: Despite the fact that this is a rare serovar, four outbreaks have been reported; 2 of them were reported in Australia.
Year | Location | Associated source | Number of cases |
2010 | Canada | headcheese | 33 |
2010 | US-multistate | Frozen meals | 44 |
2005 | Australia | Tap water | 26 |
1988 | Australia | Turtle meat | 36 |
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