The delayed treatment of pediatric periorbital cellulitis may have severe consequences. In addition, the antibiotic efficacy against causative bacteria may change over time, and it is important to understand the appropriate antibiotic options for effective treatment in pediatric patients. We compared the changes in cultured bacteria and drug susceptibility tests between two decades, 2010-2019 and 2000-2009, to establish antibiotics for empirical use. The patient characteristics, etiologies, culture sites, and isolated bacteria, and the antibiotic susceptibility tests of the admitted pediatric patients (n = 207) diagnosed with preseptal and orbital cellulitis during 2000 to 2019, were recorded. Insect/animal bites (p = 0.084) showed an increasing trend, and sinusitis (p = 0.016) showed a significant decrease in the past decades. The most common bacteria were Staphylococcus aureus, and methicillin-resistant S. aureus (MRSA) infections increased in recent decades (p = 0.01). Moreover, we found that vancomycin was ideal for MRSA infections. The decreasing efficacy of oxacillin correlates with the increasing proportion of MRSA in pediatric periorbital cellulitis. Our study thus offers antibiotic choices against the most common isolates that can be administered before culture results are available.
Keywords: antibiotics; bacteria; drug susceptibility tests; etiologies; pediatric periorbital cellulitis.