An outbreak of school influenza complicated with mycoplasma pneumoniae infection
10.16835/j.cnki.1000-9817.2023.02.024
- VernacularTitle:一起学校流感合并肺炎支原体感染暴发调查
- Author:
HU Yongdi, YIN Chunli, DOU Wenxia, FENG Taicong, LIU Xiaofeng, LIU Yun, YANG Mingzhen, SHEN Yanhua, XIANG Lunhui
1
Author Information
1. Department of Acute Infectious Disease Prevention and Control, Baoshan Center for Disease Control and Prevention, Shanghai (201901) , China
- Publication Type:Journal Article
- Keywords:
Influenza,human;
Mycoplasma pneumoniae;
Epidemiologic studies;
Incidence;
Students
- From:
Chinese Journal of School Health
2023;44(2):266-268
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To describe the clinical features, causal agent and transmission mode of a fever outbreak in a school in Shanghai.
Methods:Field epidemiological approaches including case definition development, searching for contacts, distribution of diseases description, environmental sampling and laboratory testing.
Results:A total of 16 influenza like cases were included, all concentrated in the one class of grade two, including 15 students and 1 teacher. Among student cases, the incidence rate was 36.59% (15/41), the average age was 7.4 years, the incidence rate was 36.84%(7/19) for boys, 36.36%(8/22) for girls. The clinical course was 5-15 days, with the median of 9 days, and 18.75%(3/16) of the cases stayed studying while sick. The nasopharyngeal swab specimens in 16 cases all tested positive for influenza B, of which 11 tested positive for mycoplasma pneumoniae and 1 case also tested positive for coronavirus OC43. Body temperature, number of mononuclear cells, and treatment time of patients infected with Influenza B and mycoplasma pneumoniae were higher than those of patients infected with influenza B alone( P <0.05). The outbreak lasted for 12 days, all sick students were treated and discharged from hospital, with no severe cases or death, and the outbreak was effectively controlled.
Conclusion:This campus cluster outbreak caused by influenza B and mycoplasma pneumoniae. Patients with influenza B with mycoplasma pneumoniae have severe symptoms and a long course of illness, suggesting the importance of early management of the epidemic.
