Buchan K A, Marten K W, Kennedy D H
J Hyg (Lond). 1974 Aug;73(1):143-50. doi: 10.1017/s0022172400023937.
A retrospective study of 258 children admitted to Ruchill Hospital, Glasgow, with croup between 1966 and 1972 indicated that the viruses most frequently associated with the syndrome were parainfluenza types 1 and 3 and influenza A. Most cases were admitted in the late autumn and winter months, with a small peak in May and June. This seasonal distribution mirrored the circulation of the main causative agents in the community, parainfluenza 1 being principally associated with the autumn cases, influenza A the winter cases and parainfluenza 3 the summer cases. Two of these ;croup associated' viruses showed regular periodicity, parainfluenza 1 occurring biennially in even years and influenza A in most years. The periodicity of parainfluenza 3 is as yet undetermined.
一项对1966年至1972年间入住格拉斯哥鲁奇尔医院的258名患哮吼的儿童进行的回顾性研究表明，与该综合征最常相关的病毒是1型和3型副流感病毒以及甲型流感病毒。大多数病例在秋末和冬季入院，5月和6月有一个小高峰。这种季节性分布反映了社区中主要病原体的传播情况，1型副流感病毒主要与秋季病例相关，甲型流感病毒与冬季病例相关，3型副流感病毒与夏季病例相关。其中两种“与哮吼相关”的病毒呈现出规律的周期性，1型副流感病毒每两年在偶数年出现一次，甲型流感病毒在大多数年份出现。3型副流感病毒的周期性尚未确定。
