TABLE 1.

Detection of norovirus, rotavirus, reovirus, enterovirus, somatic phages, and F-specific phages in river water samples, Maas and Waal Rivers

DateLocationConcn (95% confidence interval)
Somatic phages (PFU/liter)F-specific phages (PFU/liter)Enteroviruses (PFU/liter)Reoviruses (PFU/liter)Noroviruses (PDU/liter)Rotaviruses (PDU/liter)
10 December 1998Maas4.0 × 104 (3.1 × 104 to 4.3 × 104)1.5 × 104 (1.4 × 104 to 1.6 × 104)1 (0.7-2)6 (5-8)85 (5-756)57 (3-504)
10 December 1998Waal6,963 (6,231-7,751)319 (279-362)0.6 (0.3-1)6 (5-7)776 (49-6,925)5,386 (333 to 5.1 × 104)
28 December 1998Maas1.8 × 104 (1.2 × 104 to 2.7 × 104)1,572 (1,238-1,960)1 (0.9-2)5 (4-7)4 (0.2-38)285 (13-2,556)
28 December 1998Waal7.7 × 104 (7.0 × 104 to 8.5 × 104)609 (541-682)0.3 (0.1-0.6)5 (4-6)4,900 (303 to 4.6 × 104)315 (20-2,823)
28 January 1999Maas2.8 × 104 (2.5 × 104 to 3.1 × 104)4,460 (4,070-4,874)1 (0.7-2)4 (3-6)397 (19-3,554)264 (13-2,369)
28 January 1999Waal2.1 × 104 (1.8 × 104 to 2.3 × 104)2,386 (2,141-2,648)0.3 (0.1-0.6)10 (9-12)29 (1-257)193 (12-1,730)
11 March 1999Maas1.6 × 104 (1.3 × 104 to 1.9 × 104)6,054 (5,530-6,610)2 (1-3)3 (2-5)370 (18-3,304)248 (12-2,220)
11 March 1999Waal5,305 (4,523-6,173)1,282 (1,159-1,413)0.8 (0.2-2)2 (0.8-4)540 (26-4,819)360 (17-3,213)