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[An outbreak of epidemic bronchiolitis]
1Shanxi Medical College, Taiyuan.
Summary
An epidemic of respiratory syncytial virus (RSV) bronchiolitis affected over 6,000 infants and children in China. Higher attack rates were linked to temperature fluctuations and smaller living spaces.
Area of Science:
- Epidemiology
- Pediatrics
- Infectious Diseases
Context:
- A significant outbreak of epidemic bronchiolitis occurred in Yunchen, Shanxi province, China, between January and March 1986.
- The outbreak involved thirteen counties and cities, with a survey in seven counties reporting 6,070 cases and an overall attack rate of 13.77%.
Purpose:
- To investigate the epidemiology, clinical characteristics, and risk factors associated with the 1986 epidemic bronchiolitis outbreak.
- To identify the primary causative pathogen and understand environmental influences on disease transmission.
Summary:
- The majority of patients were infants and young children, with the highest attack rates observed in the 0- and 1-age groups. Males had a higher attack rate than females (1.4:1 ratio).
- Clinical manifestations frequently included obstructive asthma symptoms (75.7%), with a case fatality rate of 1%. Etiologic and serologic studies confirmed respiratory syncytial virus (RSV) as the main pathogen.
- Significant risk factors identified included greater daily temperature variation and smaller average living space per person, suggesting environmental and socioeconomic influences on disease spread.
Impact:
- This study highlights the significant impact of RSV bronchiolitis on young populations and identifies key environmental risk factors.
- Findings provide crucial insights for public health strategies aimed at preventing and controlling future outbreaks, particularly in relation to climate and housing conditions.