title: A case of familial hot tub lung.
abstract: Hot tub lung is a lung disease caused by Mycobacterium avium complex. We report the first case of familial hot tub lung appearing simultaneously in a husband and wife. Our case supports the consideration that hot tub lung is a hypersensitivity pneumonitis rather than an infectious lung disease. It also suggests that the state of hot tub lung changes seasonally depending on temperature variations, in a manner similar to summer-type hypersensitivity pneumonitis. This case demonstrates similarities between hot tub lung and summer-type hypersensitivity pneumonitis in regards to familial occurrence and seasonal changes in the disease state.
authors.affiliation: Department of Respiratory Medicine, National Hospital Organization Kure Medical Center and Chugoku Cancer Center, 3-1 Aoyama-cho, Kure, 737-0023, Japan.
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Kitahara
authors.affiliation: Department of Respiratory Medicine, National Hospital Organization Kure Medical Center and Chugoku Cancer Center, 3-1 Aoyama-cho, Kure, 737-0023, Japan.
authors.forename: Yusuke
authors.initials: Y
authors.lastname: Araki
authors.affiliation: Department of Respiratory Medicine, National Hospital Organization Kure Medical Center and Chugoku Cancer Center, 3-1 Aoyama-cho, Kure, 737-0023, Japan.
authors.forename: Kikuo
authors.initials: K
authors.lastname: Nakano
keywords: Hot tub lung; Krebs Von Den Lungen-6; Mycobacterium avium complex