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Epidemiology of streptococcal pyoderma in an orphanage community of a tropical country
1Department of Microbiology, Christian Medical College Hospital, Tamil Nadu, India.
Insights
This study tracked streptococcal pyoderma in Indian children, finding a 10.1% prevalence. Active surveillance and treatment of pyoderma are crucial for preventing post-streptococcal glomerulonephritis (PSGN).
Area of Science:
- Epidemiology
- Infectious Diseases
- Public Health
Background:
- Streptococcal pyoderma is a skin infection caused by group A streptococci (GAS).
- Post-streptococcal glomerulonephritis (PSGN) is a potential complication of GAS infections.
- Understanding pyoderma prevalence is key to preventing PSGN, especially in vulnerable populations.
Purpose of the Study:
- To determine the prevalence of streptococcal pyoderma in an orphanage population in Vellore, India.
- To investigate potential links between meteorological factors and pyoderma seasonality.
- To assess the incidence of PSGN during the study period and emphasize prevention strategies.
Main Methods:
- Monthly surveys of 89 children in an orphanage from October 1976 to December 1978.
- Isolation of group A streptococci (GAS) to define pyoderma.
- Monitoring meteorological data (temperature, humidity, rainfall).
- Clinical surveillance for post-streptococcal glomerulonephritis (PSGN).
Main Results:
- A prevalence rate of 10.1% for pyoderma was observed, with monthly variations.
- No significant correlation was found between temperature, humidity, rainfall, and pyoderma seasonality.
- Hot and humid climate may contribute to endemicity.
- No cases of PSGN were detected; one child had transient albuminuria.
Conclusions:
- Active surveillance and prompt treatment of streptococcal pyoderma are vital for preventing PSGN in high-risk populations.
- The endemic nature of pyoderma in Vellore's climate warrants ongoing public health attention.
- Further research into M types of GAS strains could inform prevention efforts.
Abstract:
A group of 89 children residing in an orphanage, situated about 12 km from Vellore town, Tamil Nadu, India, were surveyed for streptococcal pyoderma, every month, from October 1976 through to December 1978. The prevalence rate of pyoderma as defined by the isolation of group A streptococci (GAS) was 10.1% with monthly variations from 2.1% to 17.1%. Three meteorological data, namely, temperature, humidity and rainfall did not show any significant relationship with seasonal patterns of pyoderma. However, a hot and humid climate, prevalent for most of the year in Vellore, may be linked to the endemicity of this condition. Studies performed on a limited number of GAS strains showed a variety of M types in the lesions. During this survey, poststreptococcal glomerulonephritis (PSGN) was not detected. In one child, a moderate albuminuria was observed; this resolved subsequently. We attest that an active surveillance of detection and treatment of pyoderma in a highly susceptible population plays an important role in the prevention of PSGN.