Trial	Organism	Number of injections	Detected	Mean (ug/kg)	Max (ug/kg)	Within replicate difference	Between replicate difference
Catering	Total E.coli	6	6	3.71	4.436	0.532	1.887
Manufacturing	Total Enterobacteriaceae	6	6	2.885	5.27	-1.659	3.056