18 Jun 2019 --- A UK Food Standards Agency (FSA) review has found that 3.5 percent of chickens purchased from the top nine UK food retailers tested positive for the higher level of contamination of campylobacter. Fresh chicken from Tesco (6 percent) had the highest amount of the bacteria, according to the results, while Asda (5.5 percent) and Morrisons (5.4 percent) closely followed. According to the FSA data, which covered samples tested from January to March 2019, these are the chickens carrying more than 1,000 colony forming units per gram (cfu/g) of campylobacter. The results have been published as part of a long-running campaign to bring together the whole food chain to tackle the problem.