We report six lactose-fermenting Salmonella Strathcona isolates carrying a lac operon on an IncHI2/IncHI2A plasmid. Whole-genome sequencing revealed intact lacI–lacZ–lacY and truncated lacA genes. These isolates represent the first detection of lactose-fermenting S . Strathcona, highlighting a risk of diagnostic errors due to reliance on lactose fermentation–based phenotypic identification.
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