Community-acquired methicillin-resistant Staphylococcus aureus outbreak in a local high school football team...

Area of Science:

• Infectious Diseases
• Microbiology
• Public Health

Background:

• Community-acquired methicillin-resistant Staphylococcus aureus (CA-MRSA) outbreaks pose a significant public health concern, particularly in settings with close physical contact.
• Soft tissue infections are common manifestations of CA-MRSA, requiring effective prevention and treatment strategies.

Purpose of the Study:

• To investigate an outbreak of CA-MRSA soft tissue infections within a high school football team.
• To evaluate the effectiveness of nasal cultures and mupirocin in predicting and controlling CA-MRSA infections.
• To identify risk factors for infection recurrence, including antibiotic treatment choices.

Main Methods:

• A retrospective review of medical records and microbiological data was performed.
• Epidemiological data on affected players and infection characteristics were collected.
• Antibiotic susceptibility testing and molecular typing (field inversion gel electrophoresis) were used to characterize CA-MRSA isolates.

Main Results:

• Thirteen football players experienced 20 CA-MRSA soft tissue infections.
• All available CA-MRSA isolates were genetically identical and exhibited uniform antibiotic susceptibility.
• Nasal cultures and mupirocin treatment were ineffective in preventing or controlling the spread of infection.
• Patients treated with beta-lactam antibiotics had a higher risk of recurrent infections.

Conclusions:

• CA-MRSA outbreaks can rapidly spread within athletic teams.
• Standard methods like nasal cultures and mupirocin may not be sufficient for controlling CA-MRSA outbreaks in this setting.
• Beta-lactam antibiotics should be used cautiously in treating CA-MRSA infections due to the increased risk of recurrence.