noun
bronchiolitis
Medical term for inflammation of the bronchioles, often caused by viral infection in infants.
乳児の細気管支炎はRSウイルスが主な原因です。
Bronchiolitis in infants is mainly caused by RS virus.
気管支炎 is bronchitis (inflammation of the bronchi), while 細気管支炎 is bronchiolitis (inflammation of the smaller bronchioles).
Compound of 細 (small), 気管支 (bronchus), and 炎 (inflammation).