The number of @entity378 outbreak among adult groups has increased. In some of them, it is difficult to identify the route of infection and sometimes many @entity1 are involved in the outbreak. We experienced a suspected case of mass outbreak in a small company separated into 2 floors. The first @entity1 , who lived in another city, was diagnosed as @entity1907 in April with bilateral extensive cavitary lesions complicated with @entity5641 on chest X-ray, and his sputum smear was Gaffky No. 8 and culture (+) (resistant to @entity3109 ). We conducted @entity272 ( @entity272 ) for those under-30 year-old. In @entity272 , 4 @entity1 showed strong positive reaction. After consulting with @entity378 specialists, three were diagnosed as @entity281 with @entity378 and one as @entity1600 . So we added 25 staffs under 60s for @entity272 and found that another 13 @entity1 were suspected to be infected with @entity378 . From the initial information, the index cast was said to work only in the 2nd floor, so the staffs in 7th floor were excluded from the survey. Through the interview with staffs by a public health nurse and an inspection of the work place with sanitary inspectors, it was concluded to expand the survey to the staffs working in the 7th floor, and another @entity281 @entity1 were found. Staffs in a small company do not belong to "danger group", but the importance of investigations by public health officials was suggested in the case of suspected outbreak.

[A suspected case of mass outbreak of XXXX in a small company separated into two floors].

@entity1 :: ('9606', 'Species') :: ['patient', 'people', 'persons'] @entity1600 :: ('MESH:D014388', 'Disease') :: ['hilar lymph node tuberculosis'] @entity5641 :: ('MESH:D010998', 'Disease') :: ['pleurisy'] @entity3109 :: ('MESH:D007538', 'Chemical') :: ['isoniazid'] @entity281 :: ('MESH:D007239', 'Disease') :: ['newly infected'] @entity272 :: ('MESH:D012871', 'Disease') :: ['TST', 'tuberculin skin test'] @entity378 :: ('MESH:D014376', 'Disease') :: ['tuberculosis'] @entity1907 :: ('MESH:D014397', 'Disease') :: ['pulmonary tuberculosis']
@entity378 :: (MESH:D014376,Disease) :: ['tuberculosis infection']
