Infectious Diseases 2019

Infectious Diseases 2019

Outbreak of Salmonella Hessarek infection associated with eggs in South Australia

16 August, 2019

Researchers have reported on a rare Salmonella serotype that caused an outbreak in Australia from 2017 to 2018. Salmonella Hessarek* was responsible for 25 infections in South Australia between March 2017 to July 2018 linked to one unnamed brand of eggs which are produced and predominantly sold in the state. A descriptive case series investigation was conducted interviewing all cases and 17 (68%) reported consuming brand X free-range eggs. Four samples of one-dozen brand X eggs were cultured for the presence of Salmonella spp. One out of the four samples returned positive for S. Hessarek in the contents of the eggs; Salmonella was not present in any of the whole egg rinses of the four samples. The high proportion of cases reporting the consumption of brand X free-range eggs and the isolation of S. Hessarek from sampling four dozen brand X eggs is an unusually strong signal implicating brand X eggs as the source of this outbreak. 


S. Hessarek was originally isolated from a
Common Raven (Corvus corax) in Iran in 19534

*S. Hessarek was originally isolated from a Common Raven (Corvus corax) in Iran in 1953 [Ann Inst Pasteur (Paris). 1953;85(2):271-4].