Pyomyositis

PATHOGENS

Leading causes:

• Staphylococcus aureus, including MRSA (accounts for ~70%)
• Gram-negative bacilli (infrequent)
  • Pseudomonas aeruginosa most common GN in the U.S.[2]
• Mixed infections with anaerobes
• Streptococcus spp. including S. pneumoniae
• Mycobacterium tuberculosis
• Immunocompromised hosts (especially advanced AIDS): Aspergillus, mycobacteria (TB, MAI), Salmonella, and other Gram-negative bacilli