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Updated: Oct 19, 2026

Subcutaneous Infection of Methicillin Resistant Staphylococcus Aureus (MRSA)
Published on: February 9, 2011
ST20 Staphylococcus aureus causing suppurative cervical lymphadenitis in an extremely low-birth-weight infant
Yuya Fukuda1, Atsuo Togashi2,3, Meiji Soe Aung4
1Department of Pediatrics, Sapporo Medical University School of Medicine, South-1, West- 16, Chuo-ku, Sapporo, 060-8543, Hokkaido, Japan. fuku.da1f9@gmail.com.
Abstract:
Neonatal suppurative cervical lymphadenitis is uncommon, particularly in extremely low-birth-weight infants. We report a 772 g infant born at 28 weeks of gestation who developed rapidly progressive unilateral cervical lymphadenitis caused by methicillin-susceptible Staphylococcus aureus (MSSA) on postnatal day 31. The infant remained afebrile and blood cultures were negative despite progression requiring repeated drainage. The cervical isolate was genotyped as ST20/spa-t3929 and shared an identical genetic profile with an earlier pharyngeal isolate, suggesting that the infection arose from pre-existing S. aureus colonization. This case highlights the potential for ST20 MSSA to cause localized invasive infection in preterm infants.
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