Epidemiological analysis of an outbreak of an adenovirus type 7 infection in a boot camp in China

Background An outbreak of respiratory disease associated with adenovirus type 7 occurred in a boot camp in China and was characterized by many cases, severe symptoms, and intrapulmonary infection in many patients. Methods We implemented a series of comprehensive preventive and control measures. We a...

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Bibliographic Details
Published in:PloS one 2020-06, Vol.15 (6), p.e0232948-e0232948
Main Authors: Guo, Zuiyuan, Tong, Libo, Xu, Shuang, Li, Bing, Wang, Zhuo, Liu, Yuandong
Format: Article
Language:English
Subjects:
Adenovirus infections
Adenoviruses
Analysis
Biology and life sciences
Body temperature
Confidence intervals
Control
Disease control
Disease prevention
Disease transmission
Diseases
Dormitories
Epidemics
Epidemiology
Fever
Hospitals
Incubation
Infection
Infections
Influenza
Lung diseases
Maximum likelihood method
Medicine and Health Sciences
Outbreaks
People and Places
Physical Sciences
Prevention
Respiratory diseases
Respiratory tract diseases
Signs and symptoms
Statistics
Time
Viruses
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Summary:Background An outbreak of respiratory disease associated with adenovirus type 7 occurred in a boot camp in China and was characterized by many cases, severe symptoms, and intrapulmonary infection in many patients. Methods We implemented a series of comprehensive preventive and control measures. We analyzed the incubation period and generation time by using the maximum likelihood method, assessed the symptom period and hospitalization duration using the Kaplan-Meier method, and estimated the basic reproductive number and dormitory transmission rate by using established methods. Results The epidemic lasted for 30 days, and 375 individuals were affected. Overall, 109 patients were hospitalized, and 266 individuals were isolated and treated. The median incubation period was 5.2 days (95% confidence interval [CI]: 5.0 to 5.4 days). The median generation time was 7.3 days (95% CI: 7.1 to 7.6 days). The median symptom period was 6 days (95% CI: 6 to 7 days). The median hospitalization duration was 9 days (95% CI: 9 to 11 days). The basic reproductive number was 5.1 (95% CI: 4.6 to 5.6), and the dormitory transmission rate was 0.15 (95% CI: 0.12 to 0.18). Conclusion Patients in the early stage of the epidemic were treated as having a regular cold and were not isolated; therefore, the virus continued to be transmitted to other susceptible individuals.
ISSN:1932-6203
1932-6203
DOI:10.1371/journal.pone.0232948