Salmonella contamination in chickens on shop shelves in the UK has dropped to the lowest level ever recorded - meeting the Food Standards Agency's reduction target well ahead of schedule, according to figures released today. Last year, the Agency announced its aim to reduce salmonella in chickens on retail sale in the UK by 50 percent within five years. At the time, studies indicated levels of salmonella to be up to about 20 percent. Latest figures, based on a survey carried out between April and June, show levels have dropped to an average of 5.8 percent across the UK.