it was found that ( 1 ) tracheitis and bronchitis occurred significantly more frequently in infants exposed to cigarette smoke in the home , ( 2 ) maternal smoking imposed greater risks upon the infant than paternal smoking , ( 3 ) occurrence of neither tracheitis nor bronchitis showed a consistent relationship to the number of cigarettes smoked , ( 4 ) a family history that was positive for respiratory illness ( chronic cough or bronchitis ) significantly influenced the incidence of bronchitis , ( 5 ) too few cases of laryngitis and pneumonia were seen to warrant any opinions regarding the adverse influence of either smoking or a family history that was positive for respiratory illness , and ( 6 ) occurrence of bronchiolitis was not affected by the presence of a smoker nor influenced by a family history that was positive for respiratory illness .
C0006277
bronchitis
C0006271
bronchiolitis