i bought a test kit for salmonella and black mould also, the test results went off the scale. The worst offender was the Woolworths store at Whitfords City Shopping Center. I approach staff including the checkout manager, a woman by the name of Myrna, and ask what is being done about this serious health risk, including an article by the Daily Mail reporting 72% of trolleys have fecal contamination. They just ignored me as a trouble maker.