TABLE 1.
PV1, PV2, and PV3 in wastewater samples by surveillance site and vaccine use, Córdoba Province, Argentina, May 2005 to April 2006a
| Time period | No. of samples
|
Total no. of PV-positive samples (%)
|
No. of positive samples by serotype (% of all positive samples)
|
|||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Córdoba City | All three sites using exclusively OPV | Córdoba City | All three sites using exclusively OPV | Córdoba City
|
All three sites using exclusively OPV
|
|||||
| PV1 | PV2 | PV3 | PV1 | PV2 | PV3 | |||||
| May-10 August 2005 (initial IPV use in Córdoba City) | 30 | 45 | 5 (17)*† | 24 (53)† | 0 (0) | 3 (60) | 2 (40) | 1 (4) | 9 (38) | 18 (75) |
| 11 August-7 September 2005 (OPV use in Córdoba City) | 8 | 12 | 6 (75) | 7 (58) | 1 (17) | 4 (67) | 5 (83) | 2 (26) | 3 (43) | 4 (57) |
| 13 September-31 December 2005 (second IPV period in Córdoba City) | 32 | 48 | 24 (75) | 28 (58) | 5 (21) | 16 (67) | 18 (75) | 10 (36) | 11 (39) | 13 (46) |
| January-Apr 2006 (final OPV use in Córdoba City) | 32 | 48 | 27 (84)* | 23 (48) | 10 (37) | 21 (78) | 14 (52) | 6 (26) | 11 (48) | 11 (48) |
a
* and †, P value of ≤0.001 (by chi-square test) for differences between periods.