Vibrio parahaemolyticus Foodborne Illness Associated with Oysters, Australia, 2021-2022.

The bacterium Vibrio parahaemolyticus is ubiquitous in tropical and temperate waters throughout the world and causes infections in humans resulting from water exposure and from ingestion of contaminated raw or undercooked seafood, such as oysters. We describe a nationwide outbreak of enteric infections caused by Vibrio parahaemolyticus in Australia during September 2021-January 2022. A total of 268 persons were linked with the outbreak, 97% of whom reported consuming Australia-grown oysters.

An outbreak and case-control study of Salmonella Havana linked to alfalfa sprouts in South Australia, 2018.

An epidemiological investigation and a retrospective case-control study were conducted into an outbreak of Havana in alfalfa sprouts, in Adelaide, Australia. In total, 31 cases of Havana were notified during June and July 2018 and linked to the outbreak. Eighteen cases and 54 unmatched controls were included in a case-control study.

A protracted outbreak of Hessarek infection associated with one brand of eggs—South Australia, March 2017 - July 2018.

Hessarek is an uncommon serotype in Australia. We report on the investigation of a protracted outbreak of 25 cases of Hessarek gastroenteritis in which cases were defined as any laboratory confirmed case of Hessarek notified to the South Australian Communicable Disease Control Branch from 1st March 2017 to 3 July 2018. We conducted a descriptive case series investigation interviewing all cases and 17 (68%) reported consuming brand X free-range eggs.