Abstract
Introduction: The burden of acute febrile illness remains underestimated in many low- and middle-income countries. The rationale of this study revolves around the gaps in diagnostics for acute febrile illnesses in these regions. Aim: To highlight the seroprevalence and co-infections of different infectious aetiologies in blood culture negative febrile patients. Materials and Methods: This cross-sectional study was conducted at Sanjay Gandhi Post Graduate Institute of Medical Sciences, Lucknow, Uttar Pradesh, India from October 2021 to July 2022, involving 153 serum samples from patients presenting with fever for less than two weeks duration during outpatient and emergency visits. The blood culture negative samples were further tested for other aetiologies such as Leptospirosis, Dengue NS1 antigen, Dengue IgM antibody, Chikungunya, Scrub typhus IgM, and Widal, respectively. Convalescent sera were also tested for all positive Widal results. All statistical analyses were performed using Statistical Package for the Social Sciences (SPSS) statistical software (IBM SPSS version 26.0, Armonk, N.Y.). Results: Out of the 153 patients enrolled, 120 patients were tested for a panel of serological tests. The majority 52 (43.3%) were aged between 21 and 40 years. Fifty-five patients (45.8%) exhibited positivity, among which Scrub typhus was the most common aetiology with 21 (17.5%) case, followed by Leptospirosis 19 (15.8%), Dengue 10 (8.3%), Chikungunya 3 (2.5%), and Enteric fever 2 (1.7%), with no cases of malaria reported. Overall, co-infections reported in present study included 7 (5.8%) cases, of which scrub typhus and Leptospirosis were the most prevalent in 5 (4.16%) cases. Two patients (1.6%) presented with a co-infection of dengue and chikungunya. Conclusion: The diverse aetiologies causing acute febrile illness necessitate a syndrome-based disease surveillance approach, accompanied by strong clinical acumen, for the betterment of patient outcomes.
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