Background and Objectives: Dengue is a mosquito‑borne viral disease which is endemic in several countries in the tropical and subtropical regions of the world. Diphu, the capital of Karbi Anglong is not an endemic region for dengue infection. It experienced its 1st major dengue outbreak in the month of September to November 2022. We conducted a study on this outbreak to understand the clinical profile, demographic and environmental conditions of dengue cases. Methods: All cases registered under Diphu Medical College and Hospital from 25th September to 25th November 2022 were studied. Records from Medical records department (MRD) and bed tickets from Medicine (Dengue ward) were analysed. Home visits were made for 10% of the total cases, where clustering of cases was observed to study the environmental factors related to dengue. A preformed proforma was used for the collection of data. Descriptive statistics were used to analyse the data. Results: 419 cases of Dengue were reported in Diphu. Of these, majority were male(55.1%) and in the age group of 11-20 years (34.8%). All cases had fever, nausea, malaise, joint pain while headache was reported in 98.1%, vomiting in 92.3%, diarrhea in 3.8% and bleeding in 1.9% cases. Thrombocytopenia was seen in majority of cases (76.8%), other abnormalities recorded were deranged liver and renal function. No fatalities were reported. Majority of cases were from urban areas and peak was at mid-November. Regarding Environmental risk factors related to dengue, all had artificial water holding container surrounding home, 1% had water tank without cover. No household practiced cleaning and drying of breeding area once in a week. Conclusion: We reported the first ever outbreak of Dengue in Diphu, Karbi Anglong. Vector surveillance and control policies need to be initiated with a plan for rapid diagnosis and treatment of cases and also to prevent future outbreaks.

Background and Objectives: Dengue is a mosquito‑borne viral disease which is endemic in several countries in the tropical and subtropical regions of the world. Diphu, the capital of Karbi Anglong is not an endemic region for dengue infection. It experienced its 1st major dengue outbreak in the month of September to November 2022. We conducted a study on this outbreak to understand the clinical profile, demographic and environmental conditions of dengue cases. Methods: All cases registered under Diphu Medical College and Hospital from 25th September to 25th November 2022 were studied. Records from Medical records department (MRD) and bed tickets from Medicine (Dengue ward) were analysed. Home visits were made for 10% of the total cases, where clustering of cases was observed to study the environmental factors related to dengue. A preformed proforma was used for the collection of data. Descriptive statistics were used to analyse the data. Results: 419 cases of Dengue were reported in Diphu. Of these, majority were male(55.1%) and in the age group of 11-20 years (34.8%). All cases had fever, nausea, malaise, joint pain while headache was reported in 98.1%, vomiting in 92.3%, diarrhea in 3.8% and bleeding in 1.9% cases. Thrombocytopenia was seen in majority of cases (76.8%), other abnormalities recorded were deranged liver and renal function. No fatalities were reported. Majority of cases were from urban areas and peak was at mid-November. Regarding Environmental risk factors related to dengue, all had artificial water holding container surrounding home, 1% had water tank without cover. No household practiced cleaning and drying of breeding area once in a week. Conclusion: We reported the first ever outbreak of Dengue in Diphu, Karbi Anglong. Vector surveillance and control policies need to be initiated with a plan for rapid diagnosis and treatment of cases and also to prevent future outbreaks.