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Article in Japanese

A neonate with pyomyositis by methicillin-susceptible Staphylococcus aureus

Naoko MATSUDA1), Makoto FUJIMORI1), Hiromichi HAMADA1), Jun-ichi TAKANASHI1)

Pyomyositis in neonates has been reported rarely. This paper reports a 25-day-old neonate with pyomyositis in the quadriceps muscle of the thigh. She was progressing poorly with an unsourced fever and admitted into this hospital. Swelling of her right quadriceps muscle of the thigh was found on the fifth day after admission, with a diagnosis of pyomyositis being made by magnetic resonance imaging. Two blood cultures showed growth of a methicillin-susceptible Staphylococcus aureus. The patient was treated with a 3-week course of intravenous antibiotics and pyomyositis has not recurred for about eight months. Pyomyositis sometimes causes abscess and osteolysis when the diagnosis is late, therefore, early treatment is important. Pyomyositis should be taken into consideration in neonates with unsourced fever, and repeating a detailed systemic examination after hospitalization is important.

1) Department of Pediatrics, Tokyo Women's Medical University Yachiyo Medical Center

Key words pyomyositis, neonate, Staphylococcus aureus
Received November 28, 2016
Accepted August 14, 2017

29 (4):345─350,2018