Not so uncommon, yet neglected 'Severe Streptococcus pyogenes infections at a tertiary care center in south India

Area of Science:

• Microbiology
• Infectious Diseases
• Public Health

Background:

• Streptococcus pyogenes (SP) causes a spectrum of illness, from mild throat and skin infections to severe invasive diseases and sequelae.
• Despite its prevalence, recent epidemiological data on SP infections are limited.
• Understanding current trends in SP infections is crucial for effective public health strategies.

Purpose of the Study:

• To investigate the clinical characteristics and antimicrobial susceptibility patterns of Streptococcus pyogenes infections in adult patients.
• To identify the most common types of SP infections and assess treatment outcomes.
• To provide data that can inform clinical management and public health interventions for SP.

Main Methods:

• Retrospective analysis of 93 adult patients with culture-proven SP infections.
• Data collected between 2016 and 2019 in South India.
• Analysis included infection types, comorbidities, antimicrobial susceptibility, and treatment outcomes.

Main Results:

• Skin and soft tissue infections (SSTI) were the most common presentation, followed by surgical site infections and bacteremia.
• All isolates remained susceptible to penicillin and cephalosporins.
• A significant proportion (23%) of isolates exhibited resistance to clindamycin.
• Timely surgical intervention and appropriate antibiotic therapy were associated with a ninefold reduction in morbidity and improved limb salvage.

Conclusions:

• Streptococcus pyogenes remains a significant pathogen, with SSTI being a predominant manifestation.
• While penicillin and cephalosporins are effective, emerging clindamycin resistance warrants monitoring.
• Prompt surgical management and judicious antibiotic use are critical for improving patient outcomes and reducing complications from SP infections.