Mexican authorities have brushed aside suspicions that tomatoes grown in Mexico caused the food poisoning outbreak in the U.S. and Canada, citing tests on local tomato farms that yielded no salmonella.

Mexico's agriculture ministry also urged Friday the U.S. Food and Drug Administration (FDA) to recognize the results of its two-week study on Mexican tomato farms and clear Mexican tomatoes of suspicions of being infected with the bacteria.

The Mexican tests covered samples from the same soil, water and tomatoes of five tomato farms in Mexico that FDA inspectors also tested for signs of the salmonella saintpaul strain of bacteria. The FDA has yet to release its own findings.

The FDA has cleared tomato farms in most Mexican states but its ban on tomatoes grown in Jalisco and Sinaloa states remains.