Skip to main content
. 2019 Feb 28;114:e180597. doi: 10.1590/0074-02760180597

TABLE. and clinical characteristics of patients suspected of Chikugunya virus (CHIKV) infection during a community outbreak in Salvador, Brazil, according to CHIKV laboratory test results, April to June 2017.

Reported characteristics Total suspected cases (n = 50) Laboratory-confirmed casesa (n = 35) Unconfirmed casesb (n = 15) p-valuec
Number (%) or median (interquartile range)
Demographic
Female 23 (46) 17 (48) 6 (40) 0.75
Median age 38 (23 - 48) 38 (23 - 48) 42 (28 - 48) 0.84
Clinical
Fever 50 (100) 35 (100) 15 (100) 1.00
Arthralgia 50 (100) 35 (100) 15 (100) 1.00
Polyarticulard 45 (90) 32 (91) 13 (86) 0.62
Symmetrice 45 (90) 31 (88) 14 (93) 1.00
Myalgia 49 (98) 35 (100) 14 (93) 0.30
Prostration 43 (86) 31 (88) 12 (80) 0.41
Chillsf 39 (79) 25 (74) 14 (93) 0.14
Headache 36 (72) 26 (76) 10 (66) 0.50
Retro-orbital pain 30 (60) 20 (57) 10 (66) 0.75
Pruritusg 27 (56) 18 (54) 9 (60) 0.76
Joint edema 24 (48) 17 (48) 7 (46) 1.00
Nausea 22 (44) 15 (42) 7 (46) 1.00
Rash 21 (42) 18 (51) 3 (20) 0.06
Conjunctival hyperemia 20 (40) 15 (42) 5 (33) 0.75
Vomit 12 (24) 8 (22) 4 (26) 1.00
Swollen lymph nodes 7 (14) 6 (17) 1 (7) 0.65

a: all 35 laboratory-confirmed patients were positive by CHIKV immunoglobulin M (IgM) enzyme-linked immunosorbent assay (ELISA); eight of them were also positive by CHIKV reverse transcription polymerase chain reaction (RT-PCR); b: of the 15 unconfirmed patients suspected of CHIKV infection, eight were negative, two equivocal, and five not tested by CHIKV IgM ELISA; c: Fisher exact test p-values for the comparisons between confirmed and unconfirmed cases suspected of CHIKV infection; d: polyarticular arthralgia defined by pain in more than one joint; e: symmetric arthralgia defined by pain in at least one pair of joints; f: data not available for one laboratory-confirmed CHIKV infection case; g: data not available for two laboratory-confirmed CHIKV infection cases.