TABLE III. Results of viral genome loads g-1 (dry matter) detected in anaerobically digested sludge samples using two concentration methods .

Sampling date	AdV		RVA		NoV		HAV		PP7
Method	1	2	1	2	1	2	1	2	1	2
28 Feb	6.8 x 10	0.9 x 10	0	0	0	0	0	0	1.0 x 103	ND
02 Mar	0	4.2 x 10	0	3.8 x 10	0	0	0	0	3.8 x 103	2.6 x 103
04 Mar	2.1 x 10	6.8 x 10	1.6 x 102	0	0	0	0	0	2.0 x 102	1.4 x 102
14 Mar	1.4 x 10	1.1 x 102	7.8 x 10	6.2 x 10	0	0	0	0	3.7 x 102	1.8 x 102
28 Mar	0	4.3 x 10	0	0	0	0	0	0	1.4 x 108	3.7 x 102
11 Apr	0	0	0	0	0	4.8 x 102a	0	0	1.3 x 108	4.8 x 102
25 Apr	1.0 x 10	2.4 x 10	0	0	0	0	0	0	1.3 x 108	9.4 x 107
16 May	0	2.7 x 102	0	0	6.4 x 10	1.2 x 102	0	0	1.3 x 108	5.4 x 107
13 Jun	0	1.9 x 102	0	0	1.4 x 10	1.5 x 102	0	2.0 x 104	3.1 x 107	5.6 x 107
27 Jun	2.4 x 103	3.6 x 102	2.5 x 10a	0	2.2 x 10	2.3 x 102	4.8 x 103	0	ND	9.2 x 107
11 Jul	0	1.6 x 102	0	7.2 x 10	1.8 x 10	5.2 x 102	0	0	1.0 x 108	ND
Positive/total (n)	5/11	10/11	3/11	3/11	4/11	5/11	1/11	1/11	10/10	9/9

a: diluted nucleic acids (1:10); AdV: adenoviruses; HAV: hepatitis A virus; Method 1: ultracentrifugation; Method 2: beef extract; ND: not done; NoV GII: norovirus genogroup II; RVA: rotavirus species.