Severe illness associated with group A-hemolytic streptococcal infections

Area of Science:

• Infectious Diseases
• Epidemiology
• Public Health

Background:

• Group A beta-hemolytic streptococcus (GABS) can cause severe, life-threatening infections.
• Surveillance is crucial for understanding the epidemiology and clinical presentation of severe GABS infections.

Purpose of the Study:

• To describe the epidemiologic features and clinical spectrum of severe GABS infections in Wisconsin.
• To identify risk factors and outcomes associated with severe GABS infections.

Main Methods:

• Retrospective case series analysis of severe GABS infections reported to the Wisconsin Division of Health (DOH).
• Inclusion criteria included GABS isolation from blood or specific severe clinical manifestations.
• Data collected on patient demographics, clinical diagnoses, and outcomes.

Main Results:

• Twenty-eight cases of severe GABS infections were reported between November 1989 and October 1990.
• Sepsis and cellulitis were the most common presentations (57% and 50%, respectively).
• The fatality rate was 32%, with older patients (median age 74) more likely to die. Pneumonia and necrotizing fasciitis/myositis were associated with increased mortality.
• The interval from illness onset to hospitalization was similar for fatal and non-fatal cases.

Conclusions:

• Severe GABS infections pose a significant public health threat, with high mortality rates.
• Older age, pneumonia, and necrotizing fasciitis/myositis are associated with increased risk of death.
• Early hospitalization may not be sufficient to improve outcomes, suggesting a need for further research into treatment timing and efficacy.