Table 4. Exposure of water sports participants in Lahn River to bla_CTX-M genes.

		activity	range	blaCTX-M genes
prevalence [copies/100 mL]			MIN	349
			AVG	3179
			MAX	20083
ingested per hour	[copies/h]	non-swimminga	MIN	7
			AVG	126
			MAX	1510
		swimming (children)b	MIN	172
			AVG	1568
			MAX	9907
		swimming (adults)b	MIN	74
			AVG	678
			MAX	4284
ingested per session	[copies/session]	non-swimmingc	MIN	27
			AVG	435
			MAX	3927
		swimming (children)d	MIN	227
			AVG	2070
			MAX	13077
		swimming (adults)d	MIN	98
			AVG	895
			MAX	5654

a) based on ingestion rates by Rijal et al. 2011, Dorevitch et al. 2011, Dufour et al. 2011, including boating, canoeing, fishing, kayaking and rowing

b) based on ingestion rates by Dufour et al. 2011

c) based on ingestion rates by Rijal et al.2011, Dorevitch et al. 2011, Dufour et al. 2011, durations by Rijal et al. 2011, including boating, canoeing, fishing

d) based on ingestion rates by Dufour et al. 2011 and average duration by Schets et al. 2011