Volume 44 Issue 2
Feb.  2023
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HU Yongdi, YIN Chunli, DOU Wenxia, FENG Taicong, LIU Xiaofeng, LIU Yun, YANG Mingzhen, SHEN Yanhua, XIANG Lunhui. An outbreak of school influenza complicated with mycoplasma pneumoniae infection[J]. CHINESE JOURNAL OF SCHOOL HEALTH, 2023, 44(2): 266-268. doi: 10.16835/j.cnki.1000-9817.2023.02.024
Citation: HU Yongdi, YIN Chunli, DOU Wenxia, FENG Taicong, LIU Xiaofeng, LIU Yun, YANG Mingzhen, SHEN Yanhua, XIANG Lunhui. An outbreak of school influenza complicated with mycoplasma pneumoniae infection[J]. CHINESE JOURNAL OF SCHOOL HEALTH, 2023, 44(2): 266-268. doi: 10.16835/j.cnki.1000-9817.2023.02.024

An outbreak of school influenza complicated with mycoplasma pneumoniae infection

doi: 10.16835/j.cnki.1000-9817.2023.02.024
  • Received Date: 2022-09-23
  • Rev Recd Date: 2022-11-18
  • Available Online: 2023-03-02
  • Publish Date: 2023-02-25
  •   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.
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