Early diagnosis and management help to reduce the morbidity and mortality rates of severe forms of dengue infection and decrease the risk of wider outbreaks as well. Efficient and accurate diagnosis of dengue is of great importance for clinical care, surveillance activity, outbreak control, academic research, clinical trials and vaccine development. All clinically suspected cases of dengue during the study period were included in this study. This study was conducted using cross-sectional study design. 71 cases observed in 0-15 years age group, 75 cases observed in 75 years age group, 43 cases observed in 31-45 years age group, 21 cases were observed in 46-60 years age group and 6 case observed in >60 years age group. Decreased platelet count observed in 204 (94.4%) out of 216 cases, 153 (70.83%) decreased platelet count observedin first week (1-5 days) of illness and 51 (23.61%) cases decreased platelet count observedin second week (6-11 days) of illness.