The number of Australians suspected of falling ill from salmonella linked to pre-packaged supermarket salads has risen to more than 200, weeks after an investigation was launched into the outbreak. 
Victorian health authorities are still searching for the outbreak's cause, believed to have originated at the Tripod Farmers facility in Bacchus Marsh. Other states are investigating reports of the same rare Salmonella Anatum strain.
It is not yet known whether interstate cases of salmonella - with the exception of one confirmed case in NSW - are linked to the strain found in the popular pre-packaged salad mixes  in Victoria.
"Other states are also investigating cases of Salmonella Anatum to see whether these are linked to the outbreak strain in Victoria, or coincidental to it," a health spokesman said.
Fairfax Media understands the company at the centre of the health crisis is continuing to assist the Victorian Department of Health and Human Services, which is leading the multi-jurisdictional outbreak investigation.
There have been 208 cases of Salmonella Anatum reported that match the outbreak case definition, the department said on Wednesday.  That number has grown significantly since the last update on   February 11, when the tally was 144.
Victoria remains the worst affected state. There have been nine confirmed cases and 144 "probable cases" in which many of those interviewed reported eating the packaged salad.
Queensland is investigating 13 probable cases, South Australia has 21, New South Wales has one confirmed case and 14 probable and the ACT is investigating one.
Although Western Australia was not part of the national salad recall sparked by the outbreak, because none of the contaminated products are distributed there, health authorities in WA are investigating five probable cases.
The increase in suspected cases was not due to any new infections, a health spokesman said.
Updates of the national recall can be found at www.foodstandards.gov.au.