IJMABHR International Journal of Medical and All Body Health ResearchIJMABHR 2582-8940 Anfo Publication House 505 10.54660/IJMBHR.2026.7.3.53-56 Evaluation of Haematological Parameters in Dengue Fever: A Hospital-Based Study ChaudharySakshi MirzaSadaf GuptaGunjan SinghMadhu Department of Pathology, Dr. KNS Memorial Institute of Medical Sciences, Barabanki, Uttar Pradesh, India Professor, Department of Pathology, Dr. KNS Memorial Institute of Medical Sciences, Barabanki, Uttar Pradesh, India Consultant Pathologist, Department of Pathology, Dr. KNS Memorial Institute of Medical Sciences, Barabanki, Uttar Pradesh, India 12072026 7 3 53 56 14052026 13062026 CC BY-NC-SA 4.0

Background: Dengue fever is a major arboviral infection in tropical and subtropical regions, and derangement of haematological parameters is central to its clinical course and prognosis.  Objective: To evaluate the pattern of haematological parameters in serologically confirmed dengue patients and to assess their relationship with disease severity. Methods: A hospital-based descriptive study was conducted on 180 confirmed dengue patients over a six-month period. Complete blood counts were analysed using an automated haematology analyser, and parameters were correlated with the presence of warning signs.  Results: The mean age was 28.6 ± 13.2 years with a male predominance (61.1%). Thrombocytopenia was the most frequent abnormality (78.3%), followed by leukopenia (47.8%) and atypical lymphocytes (37.8%). The mean platelet count fell to a nadir of 65 ×10³/µL around the sixth day of illness. Severe thrombocytopenia (

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