Table 1. Demographic and clinical characteristics of suspected cases of CHIKV infection during April/2016 to November/2017 in Piaui, Brazil, according to CHIKV laboratory test results (RT-PCR).
| All Samples (n=580) | Suspected cases (n=112) | Positive (n=33) | Negative (n=79) | Sequenced (CHIKV ECSA) (n=14) | ||
|---|---|---|---|---|---|---|
| Sex | ||||||
| Female | 66.4% | 62.5% | 54.55% | 65.82% | 57.14% | |
|
| ||||||
| Age (years) | ||||||
| Median(range) | 33(1-89) | 29(3-85) | 35(6-85) | 27(3-76) | 37(7-73) | |
|
| ||||||
| Clinical Symptoms | ||||||
| Fever | 84.65% | 85.71% | 93.94% | 81.01% | 100% | |
| Arthralgia | 82.06% | 82.14% | 90.91% | 78.48% | 92.86% | |
| Headache | 77.75% | 74.11% | 81.82% | 69.62% | 92.86% | |
| Myalgia | 71.38% | 66.96% | 75.76% | 63.29% | 100% | |
| Exanthema | 63.79% | 66.07% | 57.57% | 69.62% | 71.43% | |
| Prostration | 54.14% | 56.25% | 48.48% | 59.49% | 57.14% | |
| Eye problems | 52.07% | 52.68% | 45.45% | 55.70% | 42.86% | |
| Nauseas | 48.02% | 42.86% | 54.54% | 37.98% | 57.14% | |
| Vomits | 25.52% | 26.78% | 21.21% | 27.89% | 28.57% | |
| Articular Edema | 23.45% | 25.89% | 39.39% | 20.25% | 57.14% | |
| Diarrhea | 18.79% | 16.94% | 12.12% | 18.99% | 14.29% | |
| Neurological Complications | 0.86% | 4.46% | 3.03% | 5.06% | 7.14% | |