. 2009 Apr 3;75(11):3379–3388. doi: 10.1128/AEM.02302-08

TABLE 5.

Correlation of HPyV and indicator bacteria in human sewage^a

HPyV or bacterium	Sample source	Statistical parameter	Fecal coliforms	Enterococci	E. coli
HPyV	Sewage	PC^b	-0.6166	-0.3279	-0.5852
		P	0.0001	0.0363	0.0001
		R²	0.3802	0.1075	0.3425
	WWTP effluent	PC	-0.7131	0.2812	-0.2836
		P	0.0310	0.4636	0.4596
		R²	0.5085	0.0791	0.0804
	Septic tanks	PC	0.0376	-0.2139	-0.3946
		P	0.9522	0.7297	0.5110
		R²	0.0014	0.0458	0.1557
	Pump trucks	PC	0.4498	-0.6062	0.6855
		P	0.2245	0.0835	0.0415
		R²	0.2023	0.3675	0.4699
E. coli	Sewage	PC	0.8718	0.3281
		P	0.0001	0.0362
		R²	0.7600	0.1077
	WWTP effluent	PC	0.1035	0.2458
		P	0.7910	0.5238
		R²	0.0107	0.0604
	Septic tanks	PC	0.8683	0.8493
		P	0.0563	0.0686
		R²	0.7539	0.7212
	Pump trucks	PC	0.8145	-0.6077
		P	0.0075	0.0826
		R²	0.6634	0.3693
Enterococci	Sewage	PC	0.4697
		P	0.0019
		R²	0.2206
	WWTP effluent	PC	-0.7167
		P	0.0298
		R²	0.5137
	Septic tanks	PC	0.9297
		P	0.0221
		R²	0.8644
	Pump truck	PC	-0.4691
		P	0.2027
		R²	0.2201

Statistics were calculated for relationships between organisms in sewage, dechlorinated tertiary-treated WWTP effluent, individual septic tanks, and septic tank pump truck samples. Relationships were considered significant when P < 0.05. Values in boldface indicate significant relationships.

PC, Pearson correlation.