Organisms responsible for causing pediatric orbital cellulitis are evolving

This retrospective review of pediatric patients treated for orbital cellulitis associated with sinusitis finds that the organisms responsible for causing pediatric orbital cellulitis are evolving. Staphylococcus species was the most common organism isolated.
 
The occurrence of Methicillin-resistant S. aureus (MRSA) in pediatric orbital cellulitis is increasing, representing 73 percent of S. aureus isolates. Streptococcus species was the next most common pathogen. Three cultures yielded Haemophilus species with one being positive for H. influenzae.
 
Researchers also observed that sinus and orbital abscess aspirates yielded the greatest number of positive cultures, though these invasive surgical procedures should be performed only when clinically indicated.