Background: Chikungunya is a vector-borne infection with high morbidity rate and associated with debilitating prolonged polyarthritis and substantial socioeconomic impact. On 4 January 2010, a chikungunya outbreak was reported in Sukadana Subdistrict, West Kalimantan, Indonesia. Objective: An epidemiological investigation was conducted to identify the risk factors for the outbreak and recommend control measures. Method: A case-control study was conducted to identify the risk factors of the outbreak. The cases were residents who had major clinical symptoms of chikungunya that were identified by active case finding through the affected area while controls were neighbor of the cases. Interviews were conducted to collect demographic and clinical data as well as the risk factors of infection. The venous blood from ten patients, selected randomly, were collected and tested for diagnosis confirmation. Results: During 12 December 2009 and 10 January 2010, a total of 65 chikungunya cases were identified with no death. Seven out of ten blood samples were confirmed as chikungunya cases. All of the patients had fever, rash and arthralgia while headache was reported in 43% of the cases. The attack rate was 17.3% (range 3.9-22.6%) and those aged > 44 year old had the highest attack rate. In multivariate model, those farming in the forest and those who had poor practices in eliminating mosquito breeding sites had higher odds of having chikungunya, with adjusted OR: 10.66 (95%CI: 3.95-28.79) and adjusted OR: 3.51 (95%CI: 1.35-9.13), respectively. Conclusions: Farming in the forest and poor vectors control are two risk factor of chikungunya infection. Therefore, using anti-mosquito repellent when farming and continuous and coordinated mosquito breeding sites elimination are recommended.

Background: Health problems in West Kalimantan are dominated by infectious diseases based on health data showing that the list of the top 10 diseases is dominated by infectious diseases, the CFR rate is still quite high and outbreaks routinely occur due to infectious diseases. The purpose of the situation analysis is to determine priorities for infectious disease problems in West Kalimantan in 2019.Methods: This research was conducted from December 2020 to February 2021 in West Kalimantan Province. The research method used is an assessment method whose results will be presented descriptively with quantitative and qualitative approaches. Determining the priority of the problem using the PAHO-Adapted Hanlon method with assessment criteria based on the size of the problem, seriousness of the problem, intervention effectiveness, inequity and institutional factors by means of interviews with related parties within the West Kalimantan Provincial Health Office.Result: The results of the analysis of infectious disease problems in West Kalimantan Province show that the top 10 diseases are still dominated by infectious diseases such as diarrhea, TB and DHF. The CFR figure which is still quite high is contributed by TB, HIV/AIDS, diphtheria and DHF. In this study, TB was selected as a priority health problem because it obtained the highest PAHO score of 25.16. TB is still a major problem because case finding has not reached the national target of 80%, there is still transmission in the community and cases of TB in children are still quite high.Conclusion: Tuberculosis is a priority infectious disease problem in West Kalimantan. TB is the first priority problem in this study because case finding is not optimal, there is transmission in the community and there are still cases of TB in children. It is hoped that with monitoring and evaluation of training for cadres and health workers, screening of TB patients can be more massive and sensitive for providing complete TB treatment.