Volume 26, Number 7—July 2020
Synopsis
Transmission of Chikungunya Virus in an Urban Slum, Brazil
Rosângela O. Anjos, Vánio André Mugabe, Patrícia S.S. Moreira, Caroline X. Carvalho, Moyra M. Portilho, Ricardo Khouri, Gielson A. Sacramento, Nivison R.R. Nery, Mitermayer G. Reis, Uriel D. Kitron, Albert I. Ko, Federico Costa, and Guilherme S. Ribeiro
Table 3
Comparison of sociodemographic and clinical characteristic of participants with symptomatic versus asymptomatic chikungunya virus infection Salvador, Brazil, November 2016 to February 2017*
| Characteristic | Disease status of infected participants, no. %† |
p value | |
|---|---|---|---|
| Symptomatic, n = 32 | Asymptomatic, n = 177 | ||
| Sociodemographic | |||
| Sex | |||
| M | 12 (37.5) | 81 (45.8) | 0.39 |
| F | 20 (62.5) | 96 (54.2) | |
| Age, y | |||
| 5–14 | 2 (6.3) | 40 (22.6) | 0.07 |
| 15–39 | 22 (68.8) | 82 (46.3) | |
| ≥40 | 8 (24.9) | 55 (31.1) | |
| Education‡ | |||
| Illiterate | 1 (3.1) | 13 (7.4) | 0.42 |
| Literate | 31 (96.9) | 163 (92.6) | |
| Skin color | |||
| White | 0 | 10 (5.7) | NA |
| Nonwhite | 32 (100) | 167 (94.3) | |
| Household per capita income, US$/day‡ | |||
| ≤5.50 | 27 (84.4) | 144 (81.8) | 0.73 |
| >5.50 |
5 (15.6) |
32 (18.2) |
|
| Clinical: reported symptoms | |||
| Fever and arthralgia | |||
| None | 0 | 111 (62.7) | <0.01 |
| Only fever | 0 | 39 (22.0) | |
| Only arthralgia | 0 | 20 (11.3) | |
| Both, not simultaneous | 0 | 7 (4.0) | |
| Both, simultaneous | 32 (100) | 0 | |
| Myalgia | |||
| Yes | 18 (56.3) | 24 (13.6) | <0.01 |
| No | 14 (43.7) | 153 (86.4) | |
| Rash | |||
| Yes | 22 (68.7) | 28 (15.9) | <0.01 |
| No | 10 (31.3) | 148 (84.1) | |
| Pruritus | |||
| Yes | 21 (65.6) | 25 (14.1) | <0.01 |
| No |
11 (34.4) |
152 (85.9) |
|
| Presumptive clinical diagnosis | |||
| Chikungunya | |||
| Yes | 20 (62.5) | 12 (6.8) | <0.01 |
| No | 12 (37.5) | 165 (93.2) | |
| Dengue | |||
| Yes | 4 (12.5) | 17 (9.6) | 0.62 |
| No | 28 (87.5) | 160 (90.4) | |
| Zika | |||
| Yes | 18 (56.3) | 20 (11.3) | <0.01 |
| No | 14 (43.7) | 157 (88.7%) | |
*NA, not available
†CHIKV disease status was defined as symptomatic on the basis of self-reported fever accompanied by arthralgia after January 2015.
‡Data not available for 1 participant with an asymptomatic CHIKV infection.
Page created: April 08, 2020
Page updated: June 18, 2020
Page reviewed: June 18, 2020
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