Community-associated methicillin-resistant Staphylococcus aureus infections at an Army training installation

Area of Science:

• Infectious Diseases
• Public Health
• Military Medicine

Background:

• Community-associated methicillin-resistant Staphylococcus aureus (CA-MRSA) poses a significant threat in high-risk populations.
• Understanding the epidemiology of CA-MRSA in military settings is crucial for effective control.

Purpose of the Study:

• To assess the incidence and trends of CA-MRSA infections among service members/trainees at Fort Benning, Georgia.
• To evaluate clinical management and antibiotic susceptibility patterns of CA-MRSA from 2002 to 2007.

Main Methods:

• Monthly incidence of laboratory-confirmed MRSA was calculated for individuals without prior hospitalization or surgery.
• Clinical data and antibiotic susceptibility testing were analyzed for CA-MRSA isolates.
• Surveillance data from calendar years 2002-2007 were utilized.

Main Results:

• By 2007, 67% of Staphylococcus aureus strains were MRSA, with 82% classified as community-associated, predominantly in trainees.
• A total of 3531 CA-MRSA infections were identified, with seasonal patterns and a peak incidence of 42 cases/1000 soldiers in 2005.
• Antibiotic susceptibility to clindamycin, ciprofloxacin, and levofloxacin decreased by 6%, 17%, and 14%, respectively, between 2002 and 2007.

Conclusions:

• Sustained high prevalence of CA-MRSA in military training installations requires vigilant, population-based countermeasures.
• Declining antibiotic susceptibility highlights the need for updated treatment guidelines and infection control strategies.
• Targeted interventions are essential to mitigate the burden of CA-MRSA in this high-risk cohort.