New Delhi, July 21 -- US health officials on Monday (local time) revealed that they continue to focus on lettuce supplied by Taylor Farms as the primary source of the multistate diarrhoea-causing cyclosporasis parasite despite inaccurate results of a lab test released by the US government over the weekend.

Officials of the Food and Drug Administration (FDA) revealed on Monday that a positive result for cyclospora on a Taylor Farms' lettuce sample was incorrectly identified. The findings were posted by the FDA on its website on Saturday, but on Sunday it revealed that the result had been a false positive, Associated Press reported.

Both federal as well as state authorities have been investigating a rise in cyclosporasis cases connected w...