Table. Prevalence of Zika, chikungunya, and dengue virus antibodies in a representative subset of the population sampled during September–November 2013 and October–November 2015, Fiji Islands*.
| Variable | No. seropositive/no. tested (% [95% CI]) |
|||||||
|---|---|---|---|---|---|---|---|---|
| Zika virus |
Chikungunya virus |
Dengue viruses† |
||||||
| 2013 | 2015 | 2013 | 2015 | 2013 | 2015 | |||
| Total |
61/778‡
(7.8 [6.1–10]) |
73/333 (21.9 [17.6–26.8]) |
|
6/778 (0.8 [0.3–1.7]) |
3/333 (0.9 [0.2–2.6]) |
|
568/778 (73 [69.7–76.1]) |
276/333 (82.9 [78.4–86.8]) |
| Age range (median), y |
2–85 (28) |
4–80 (29) |
|
2–85 (28) |
4–80 (29) |
|
2–78 (28) |
4–80 (29) |
| Age group, y | ||||||||
| 0–19 | 29/282 (10.3 [7–14.4]) | 29/115 (25.2 [17.6–34.2]) | 4/282 (1.4 [0.4–3.6]) | 1/115 (0.9 [0–4.7]) | 141/282 (50 [44–56]) | 78/115 (67.8 [58.5–76.2]) | ||
| 20–39 | 15/239 (6.3 [3.6–10.1]) | 18/103 (17.5 [10.7–26.2]) | 1/239 (0.4 [0–2.3]) | 1/103 (1 [0–5.3]) | 201/239 (84.1 [78.8–88.5]) | 93/103 (90.3 [82.9–95.2]) | ||
| 40–59 | 11/179 (6.1 [3.1–10.7]) | 13/73 (17.8 [9.8–28.5]) | 1/179 (0.6 [0–3.1]) | 1/73 (1.4 [0–7.4]) | 161/179 (89.9 [84.6–93.9]) | 68/73 (93.2 [84.7–97.7]) | ||
| ≥60 |
6/77 (7.8 [2.9–16.2]) |
13/42 (31 [17.6–47.1]) |
|
0/77 (0 [0–4.7]) |
0/42 (0 [0–8.4]) |
|
64/77 (83.1 [72.9–90.7]) |
37/42 (88.1 [74.4–96]) |
| Sex | ||||||||
| F | 28/423 (6.6 [4.4–9.4]) | 41/190 (21.6 [16–28.1]) | 4/423 (0.9 [0.3–2.4]) | 2/190 (1.1 [0.1–3.8]) | 312/423 (73.8 [69.3–77.9]) | 165/190 (86.8 [81.2–91.3]) | ||
| M |
33/354 (9.3 [6.5–12.8]) |
32/143 (22.4 [15.8–30.1]) |
|
2/354 (0.6 [0.1–2]) |
1/143 (0.7 [0–3.8]) |
|
255/354 (72 [67–76.6]) |
111/143 (77.6 [69.9–84.2]) |
| Division | ||||||||
| Central | 30/451 (6.7 [4.5–9.4]) | 73/333 (21.9 [17.6–26.8]) | 5/451 (1.1 [0.4–2.6]) | 3/333 (0.9 [0.2–2.6]) | 331/451 (73.4 [69.1–77.4]) | 276/333 (82.9 [78.4–86.8]) | ||
| Northern | 7/59 (11.9 [4.9–22.9]) | ND | 0/59 (0 [0–6.1]) | ND | 51/59 (86.4 [75–94]) | ND | ||
| Western |
24/268 (9 [5.8–13]) |
ND |
|
1/268 (0.4 [0–2.1]) |
ND |
|
186/268 (69.4 [63.5–74.9]) |
ND |
| Area | ||||||||
| Periurban | 10/135 (7.4 [3.6–13.2]) | 19/77 (24.7 [15.6–35.8]) | 2/135 (1.5 [0.2–5.2]) | 0/77 (0 [0–4.7]) | 104/135 (77 [69–83.8]) | 66/77 (85.7 [75.9–92.6]) | ||
| Rural | 24/344 (7 [4.5–10.2]) | 16/113 (14.2 [8.3–22]) | 2/344 (0.6 [0.1–2.1]) | 0/113 (0 [0–3.2]) | 234/344 (68 [62.8–72.9]) | 84/113 (74.3 [65.3–82.1]) | ||
| Urban | 27/298 (9.1 [6.1–12.9]) | 38/143 (26.6 [19.5–34.6]) | 2/298 (0.7 [0.1–2.4]) | 3/143 (2.1 [0.4–6]) | 229/298 (76.8 [71.6–81.5]) | 126/143 (88.1 [81.6–92.9]) | ||
*No participants were recruited in the Northern and Western divisions in 2015. ND, no data. †Seropositivity for >1 serotypes of dengue virus. ‡For 1 participant, demographic data were not available except for the administrative division of residence.