Volume 18, Number 5—May 2012
Letter
Serologic Evidence of West Nile Virus Infection among Humans, Morocco
Hicham El Rhaffouli
, Mehdi El Harrak, Chafiqa Lotfi, Fatima El Boukhrissi, Tahar Bajjou, Abdelilah Laraqui, Farida Hilali, Mouna Kenfaoui, and Idriss Lahlou-Amine
, Mehdi El Harrak, Chafiqa Lotfi, Fatima El Boukhrissi, Tahar Bajjou, Abdelilah Laraqui, Farida Hilali, Mouna Kenfaoui, and Idriss Lahlou-AmineTable
West Nile virus neutralizing antibody titers in human serum samples obtained during March–April 2011, Morocco
| Cohort, location* | No. samples positive/no. tested (%) | Median ± SD | Titer (%) |
||
|---|---|---|---|---|---|
| Weak, 18–80 | Intermediate, 81–320 | High, >320 | |||
| A, Meknes | 7/150 (4.7) | 54 ± 42.5 | 5 (71.4) | 1 (14.3) | 1 (14.3) |
| B, Rabat | 24/200 (12) | 54 ± 31 | 22 (91.7) | 1 (4.2) | 1 (4.2) |
| C, Kenitra | 28/149 (18.8) | 95 ± 72 | 19 (67.9) | 3 (10.7) | 6 (21.4) |
| Total | 59/499 (11.8) | 72 ± 41 | 46 (78) | 5 (8.5) | 9 (13.5) |
*Study participants were divided into 3 cohorts according to the vicinity from which they were recruited.
