TABLE 3.

Bacterial indicators and bacteriophage densities

Tracera	No. of samples	% Positive samples	Log10 CFU or PFU per 100 ml					P valueb
			Minimum	Maximum	Mean	SD	Median
FC-H	110	100	5.43	8.26	6.94	0.55	6.94	<0.001
FC-A	111	100	3.90	10.24	7.43	0.94	7.39
FE-H	108	100	4.01	7.20	6.01	0.53	6.04	<0.001
FE-A	111	100	4.54	8.89	6.37	0.88	6.20
CL-H	110	100	3.56	6.96	5.05	0.66	5.07	0.160
CL-A	111	100	3.28	8.30	5.24	1.25	4.89
TBIF-H	56	100	<5.60	8.24	7.01	0.57	6.98	0.119
TBIF-A	56	98.2	<3.00	9.73	7.30	1.22	7.31
SFBIF-H	54	100	<5.00	8.15	6.40	0.59	6.41	<0.001
SFBIF-A	56	21.4	<3.00	9.00	<5.27	1.39	<5.08
SOMCPH-H	110	100	4.04	7.66	6.03	0.80	6.07	<0.001
SOMCPH-A	110	100	1.69	9.62	6.73	1.13	6.72
FRNAPH-H	110	99	<1.70	6.92	5.30	0.89	5.62	0.008
FRNAPH-A	110	80	<1.70	8.40	4.76	1.84	5.21
RYC2056-H	108	99	<1.70	5.53	3.99	0.81	4.14	<0.001
RYC2056-A	110	78.1	<1.70	5.96	3.50	1.27	3.53
BTHPH-H	73	98.6	<1.70	5.86	4.19	0.68	4.17	<0.001
BTHPH-A	71	7.0	<1.70	3.08	1.76	0.25	<1.70

^aLabels of tracers are shown in the list of variables in Table 2. H, samples of human origin; A, samples of animal origin.

^bValue of P from Student's t test.