Case Report

Streptococcus agalactiae Myositis in a Child with Perinatally Acquired Human Immnodeficiency Virus

Authors: Rachel Hull, Hannah Gay, MD, Henry Giles, MD, Michael Nowicki MD

Abstract

Pyomyositis is a musculoskeletal infection with formation of an intramuscular abscess. Endemic in tropical climates, it is being reported with increasing frequency in temperate climates such as the United States. The most common causative organism is Staphylococcus aureus, present in greater than 90% of reported cases. Risk factors include underlying chronic illness, malnutrition, immunocompromised state, and muscle trauma. We present a case in which Streptococcus agalactae was the causative agent of myositis in a child with a history of perinatally derived human immunodeficiency virus infection.


Key Points


* Pyomyositis due to Streptococcus agalactiae is a rare finding.


* Human immunodeficiency virus infection is a risk factor for opportunistic infections.


* Magnetic resonance imaging is a useful tool in the diagnosis of deep-seated pyomyositis.

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