TABLE 3.

Occurrence and abundance of the standard fecal indicator bacterium Clostridium perfringens in diverse animal groups from an alluvial backwater (2010 to 2013)

Fecal source	n	Occurrence (%)	Abundance (log10 CFU · g−1 feces)a
			Mean	Median	Percentile		Max
					5th	95th
Poikilothermic invertebrates
Earthworm	26	54	2.8	2.8	2.1	3.5	4.0
Gastropod	26	39	2.6	2.7	2.0	3.2	3.3
Total	52	46	2.7	2.7	1.9	3.3	4.0
Poikilothermic vertebrates
Frog	19	42	3.6	3.5	2.1	5.5	6.1
Fish	27	41	2.9	2.8	2.1	4.2	4.5
Total	46	41	3.2	3.0	2.0	4.6	6.1
Homeothermic vertebrates
Bird	15	60	3.4	3.1	2.0	6.1	7.5
Ruminant	43	9	3.5	3.5	2.2	5.1	5.3
Wild boar	16	50	3.7	3.6	2.5	5.1	5.7
Carnivore	17	59	5.6	5.3	4.4	7.4	7.4
Total	91	34	4.2	3.8	1.9	7.4	7.5

^aAbundance data (i.e., median, mean, 5th and 95th percentiles, max) were calculated, excluding nondetectable data. All results are given in CFU · g⁻¹ feces (wet weight). Detection limits for earthworms, 1.5 to 3.0 log₁₀ CFU · g⁻¹; for snails, 1.9 to 3.0 log₁₀ CFU · g⁻¹; for frogs, 1.8 to 3.0 log₁₀ CFU · g⁻¹; for fish, 0.8 to 2.4 log₁₀ CFU · g⁻¹; for birds, 1.8 to 2.2 log₁₀ CFU · g⁻¹; for ruminants, 1.7 to 2.0 log₁₀ CFU · g⁻¹; for boar, 1.7 to 2.0 log₁₀ CFU · g⁻¹; and for carnivores, 1.9 to 2.0 log₁₀ CFU g⁻¹. Mean, arithmetic mean; max, maximum.