South Australia's health authority has initiated a recall of oysters from the Coffin Bay region after an outbreak of Vibrio parahaemolyticus (VP) made 56 people ill. The recall, which covers all oysters sold from September 4 to November 16, and the temporary halt of oyster harvesting and production, are expected to significantly impact the industry and may force some businesses to close. The outbreak, the first in two years, is linked to "highly unusual" environmental conditions.