https://phys.org/news/2018-11-supermarket-harbors-antibiotic-resistance-genes.html

Produce is increasingly recognized as a source of pathogenic bacteria, antibiotic-resistant bacteria, and antibiotic resistance genes. This study aimed to explore methods to characterize the transferable resistome—the collection of antibiotic resistance genes present in bacteria—associated with produce.

The researchers analyzed mixed salad, arugula, and cilantro purchased from supermarkets in Germany by cultivation and DNA-based methods.