Table 3. Exposure of water sports participants in Lahn River to (theoretically antibiotic-resistant) E. coli.

		activity	range	(1) total E. coli	(2) resistant E. coli	(3) resistant E. coli	(4) ESBL E. coli	(5) ESBL E. coli	(6) diarrheagenic ESBL E. coli	(7) diarrheagenic ESBL E. coli
prevalence [MPN/100 mL]			MIN	15	5	7	0	0	0	0
			AVG	3158	1011	1516	2	54	0	5
			MAX	27730	8874	13310	14	471	1	40
ingested per hour	[MPN/h]	non-swimminga	MIN	0	0	0	0	0	0	0
			AVG	125	40	60	0	2	0	0
			MAX	2085	667	1001	1	35	0	3
		swimming (children)b	MIN	7	2	4	0	0	0	0
			AVG	1558	499	748	1	26	0	2
			MAX	13679	4377	6566	7	233	1	20
		swimming (adults)b	MIN	3	1	2	0	0	0	0
			AVG	674	216	323	0	11	0	1
			MAX	5915	1893	2839	3	101	0	9
ingested per session	[MPN/session]	non-swimmingc	MIN	1	0	1	0	0	0	0
			AVG	430	138	206	0	7	0	1
			MAX	5422	1735	2602	3	92	0	8
		swimming (children)d	MIN	10	3	5	0	0	0	0
			AVG	2057	658	987	1	35	0	3
			MAX	18057	5778	8667	9	307	1	26
		swimming (adults)d	MIN	4	1	2	0	0	0	0
			AVG	889	285	427	0	15	0	1
			MAX	7808	2498	3748	4	133	0	11

(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; (1) based on Herrig et al. 2015; (2) based on (1) and Blaak et al. 2011 (32% of E. coli antibiotic-resistant E. coli); (3) based on (1) and Blaak et al. 2011 (48% of E. coli antibiotic-resistant); (4) based on (1) and Blaak et al. 2014 (0.05% of E. coli producing ESBL); (5) based on (1) and Haberecht et al. 2019 (1.7% of E. coli producing ESBL); (6) based on (4) and Franz et al. 2015 (8.5% of ESBL producing E. coli diarrheagenic); (7) based on (5) and Franz et al. 2015 (8.5% of ESBL producing E. coli diarrheagenic).