Outdoor air pollution contributed harmful impact to public health. There are several respiratory disorders related to outdoor air pollution such as acute respiratory infection, lung cancer, asthma, chronic obstructive lung disease (COPD) and lung function disorder. Respirator is a personnel protective device which has role in the primary intervention step. Currently exist many types of respirators in industrial setting that have specific function to certain hazard exposure in work process. It is difficult to choose one type of respirator that can be implemented in population setting to protect against all air pollutant content. Therefore, it is relevant choosing one respirator type which has the ability to effectively filtrate one of air pollutant content that is the particulate matter. One respirator type, N95 mask has superiority in term of cost and technical use aspects for protecting particulate matter pollutant. Respirator usage effectivity in population setting is an important subject to find out more.

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Background: The risk of tuberculosis among HCW were higher than another profession since the opportunity of contact with TB patients will be more frequent. The risk of LTBI were higher for people living in high burden TB country, then HCW in Indonesia have both risk. Objective: This study was done to know the risk factors for LTBI cases in HCW at infectious disease hospital. Methods : A cross-sectional study design, we examined 108 HCW at Sulianti Saroso Infectious Diseases Hospital (SSIDH), using TST with PPD RT 23 then measurement the TST after 48-72 hours. TST result with induration more than 10 mm, no TB symptoms and normal CXR will be determined as LTBI. Result : The prevalence of LTBI is 49%, as many as 53 out of 108 health workers take the TST. There were significantly different among HCW working for more than 5 years (44.5%) and before (4.6%). HCW who work for more than 5 years are 4.3 times more likely to be sick with LTBI compared to workers who work for <5 years (95% CI: 1.4-12.7). Conclusion: This study showed an increased risk of LTBI with long as the duration of work. Therefore it is important to improve the infection control program.