Volume 30, Number 12—December 2024
Dispatch
Chikungunya Outbreak Risks after the 2014 Outbreak, Dominican Republic
Table
Population characteristics and prevalence information from study of future risks for chikungunya outbreaks in the Dominican Republic*
Category | Household serologic survey† |
Acute febrile infection illness‡ |
|||||||
---|---|---|---|---|---|---|---|---|---|
All study participants, n = 397 |
CHIKV seropositive, n = 319 | CHIKV seronegative, n = 78 | All study participants, n = 275 |
CHIKV seropositive, n = 62 | CHIKV seronegative, n = 213 | ||||
Province | |||||||||
San Pedro de Macorís | 311 | 260 (84) | 51 (16) | 131 | 34 (26) | 97 (74) | |||
Espaillat | 86 | 59 (69) | 27 (31) | 135 | 25 (19) | 110 (81) | |||
Other |
0 |
0 |
0 |
9 |
3 (33) |
6 (67) |
|||
Year of birth | |||||||||
Before 2014 | 392 | 319 (81) | 73 (19) | 110 | 60 (55) | 50 (45) | |||
2014 | 3 | 0 | 3 (100) | 14 | 1 (7) | 13 (93) | |||
After 2014 |
2 |
0 |
2 (100) |
151 |
1 (1) |
150 (99) |
|||
Median age, y (IQR) |
32 (17.4–55.5) |
31.9 (18–55.5) |
32.7 (13–56.3) |
6.7 (4.0–10.0) |
10.7 (9.5–11.4) |
5.3 (3.7–7.5) |
|||
Age group, y | |||||||||
1–5 | 0 | 0 | 0 | 118 | 1 (1) | 117 (99) | |||
6–10 | 43 | 28 (65) | 15 (35) | 114 | 37 (32) | 77 (68) | |||
11–20 | 95 | 81 (85) | 14 (15) | 43 | 24 (56) | 19 (44) | |||
21–40 | 99 | 81 (82) | 18 (18) | 0 | 0 | 0 | |||
41–60 | 87 | 68 (78) | 19 (22) | 0 | 0 | 0 | |||
≥61 |
73 |
61 (84) |
12 (16) |
0 |
0 |
0 |
|||
Sex | |||||||||
F | 250 | 206 (82) | 44 (18) | 131 | 37 (28) | 94 (72) | |||
M |
147 |
113 (77) |
34 (23) |
144 |
25 (17) |
119 (83) |
|||
Place of birth | |||||||||
Dominican Republic | 384 | 309 (80) | 75 (20) | 270 | 61 (23) | 209 (77) | |||
Other |
13 |
10 (77) |
3 (23) |
5 |
1 (20) |
4 (80) |
|||
Educational attainment | |||||||||
No formal education | 23 | 17 (74) | 6 (26) | 153 | 12 (8) | 141 (92) | |||
Primary | 112 | 95 (85) | 17 (15) | 119 | 49 (41) | 70 (59) | |||
Secondary | 123 | 104 (85) | 19 (15) | 2 | 1 (50) | 1 (50) | |||
Technical | 13 | 11 (85) | 2 (15) | 0 | 0 | 0 | |||
University | 37 | 26 (70) | 11 (30) | 0 | 0 | 0 | |||
Missing or not available |
89 |
66 (74) |
23 (26) |
1 |
0 |
1 (100) |
|||
Occupation | |||||||||
Active worker | 91 | 67 (74) | 24 (26) | 1 | 1 (100) | 0 | |||
Houseperson | 82 | 72 (88) | 10 (12) | 0 | 0 | 0 | |||
Student | 130 | 102 (78) | 28 (22) | 161 | 58 (36) | 103 (64) | |||
Retired | 12 | 10 (83) | 2 (17) | 0 | 0 | 0 | |||
Unemployed | 79 | 67 (85) | 12 (15) | 3 | 0 | 3 (100) | |||
Preschool | 0 | 0 | 0 | 110 | 3 (3) | 107 (97) | |||
Other |
3 |
2 (67) |
2 (67) |
0 |
0 |
0 |
|||
Self-reported prior infection | |||||||||
Chikungunya | 108 | 97 (90) | 11 (10) | NA | NA | NA | |||
Dengue | 14 | 14 (100) | 0 | NA | NA | NA | |||
Zika | 3 |
3 (100) | 0 | NA |
NA | NA |
*Values are no. (%) except as inidicated. CHIKV, chikungunya virus; NA, not applicable. †Serologic status was assessed for household serologic survey participants using chikungunya plaque reduction neutralization test (n = 202) and ELISA to detect CHIKV IgG (n = 195). ‡Serologic status for all acute febrile illness surveillance participants was assessed using chikungunya plaque reduction neutralization test.
1These first authors contributed equally to this article.