Volume 18, Number 11—November 2012
Research
Seroprevalence of Antibodies against Chikungunya, Dengue, and Rift Valley Fever Viruses after Febrile Illness Outbreak, Madagascar
Table 1
Measurement of antibodies against CHIKV, DENV, and RVFV in samples from pregnant women in Madagascar, May–July 2010*
Location | Altitude, m | Month | Total no. women | No. (%) women with |
||||
---|---|---|---|---|---|---|---|---|
IgG against CHIKV | IgG against DENV | IgG against RVFV | IgG against CHIKV/DENV† | IgM against CHIKV‡ | ||||
Mananjary | 0 (coastal) | May | 195 | 87 (44.6) | 34 (17.4) | 2 (1) | 14 (7.2) | 53 (27.5) |
Manakara | 0 (coastal) | Jun | 251 | 57 (22.7) | 27(10.8) | 1 (0.4) | 6 (2.4) | 13 (5.2) |
Ifanadiana | 466 | Jun | 197 | 2 (1.0) | 4(2.0) | 0 | 0 | 0 |
Moramanga | 920 | Jul | 198 | 6 (3.1) | 23(11.7) | 0 | 1 (0.5) | 0 |
Tsiroanomandidy | 860 | Jul | 203 | 0 | 8 (3.9) | 1 (0.5) | 0 | 0 |
Ambositra | 1,280 | May | 175‡ | 2 (1.1) | 1(0.6) | 0 | 1 (0.6) | 0 |
*CHIKV, chikungunya virus; DENV, dengue virus; RVFV, Rift Valley fever virus.
†Samples that were positive for IgG against both CHIKV and DENV.
‡For 25 women from Ambositra, no serologic samples were taken. No samples were positive for IgM against DENV.
1These authors contributed equally to this article.