Epidemiological surveillance of Chikungunya cases – Findings from a tertiary care hospital in New Delhi

Abstract

Background: Chikungunya epidemic is a major public health problem in metro cities in India especially during rainy season. There was an epidemic of chikungunyain the year 2016 in New Delhi. Therefore, this present study was planned to understand epidemiological and clinical profile of Chikungunya cases attending fever clinic in a tertiary care teaching hospital in Delhi. Methods & Materials: A total of 200 patients with fever of up to 7 days duration who reported at fever clinic of a tertiary care hospital in New Delhi were studied over a period of 6 months. A total of 47,874 fever cases were reported in fever clinic in same duration. Serum specimens were screened for chikungunya infection by serology (IgM). Chikungunya infection was detected in 16.5% patients by anti-CHIKV IgM antibodies by ELISA. A preformed semi-structured, interviewer administered questionnaire was used for the purpose of data collection. Results: Among these 200 suspected cases of chikungunya, fever (96.0%), joint pain (81.0%), myalgia (77.5%) and lower backache (57.5%) were the major clinical features. Major joints involved were knee joint (45.5%), wrist (32.5%), hand (phalanges) (34.5%) and ankle joints (31.0%). Myalgia, rashes, joint pain and joint swelling was frequently observed among chikungunya confirmed cases (p < 0.05). All group of ages, both gender and all class of socioeconomic scale were equally susceptible to chikungunya infection. Conclusion: Chikungunya virus had a wide spectrum of clinical features and all age groups, gender and socioeconomic status people were equally susceptible to Chikungunya infection. All acute febrile illness patients with joint pain should be screened in the laboratory for both Chikungunya IgM antibodies. Predictability of chikungunya is more in presence of joint pain and swelling, myalgia and rashes. This study emphasizes the need for a continuous surveillance on the disease burden.