Uncovering the uncommon: a primary pyomyositis of vastus muscle by Streptococcus pyogenes in an immunocompetent child

Faisal, Ummu Salamah and Meor Jamaludin, Wan Husna Barakah and Abdul Tahrim, Muhammad Zaki and Ramli, Ramliza and Zainulabid, Ummu Afeera (2023) Uncovering the uncommon: a primary pyomyositis of vastus muscle by Streptococcus pyogenes in an immunocompetent child. In: APCCMI 2023 The 19th Asia Pacific Congress of Clinical Microbiology and Infection & The 26th Conference of the Korean Society of Clinical Microbiology, 6-8 Jul 2023, Seoul, Korea. (Unpublished)

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Abstract

Pyomyositis is a condition where a primary muscle abscess forms within the striated muscle. "Tropical pyomyositis" refers to the disease's prevalence in tropical countries with high temperatures and humidity. Staphylococcus aureus is the most common organism involved, followed by other organisms such as Group A Streptococcus, Streptococcus Groups B, C, and G, pneumococcus, Neisseria sp., Haemophilus sp., Aeromonas sp., Pseudomonas sp., Klebsiella sp., and Escherichia coli. This case report describes a rare case of primary pyomyositis of the vastus muscle caused by Streptococcus pyogenes in an immunocompetent 12-year-old boy. The patient presented with severe right thigh pain and fever following a fall during a football game. The initial diagnosis was viral myositis. However, subsequent imaging revealed an avulsion fracture of the right lesser trochanter apophysis complicated with an infected hematoma. The patient was treated with antibiotics. He underwent ultrasound-guided drainage of the hematoma. Bacterial culture and sensitivity testing identified Streptococcus pyogenes. The patient recovered fully after a two-week hospital stay and continued oral antibiotics for another four weeks. This case highlights a rare presentation of pyomyositis of the vastus medialis muscle, which can mimic other conditions. A proper diagnosis can be established by aspiration of pus from the muscle or muscle biopsy with culture and tissue staining in cases of absent macroabscesses. Tropical pyomyositis should be considered in the differential diagnosis of any patient presenting with muscle pain, fever, and/or leucocytosis.

Item Type:	Conference or Workshop Item (Poster)
Additional Information:	8305/106104
Uncontrolled Keywords:	pyomyositis, Streptococcus pyogenes, tropical pyomyositis
Subjects:	R Medicine > RC Internal medicine > RC111 Infectious and Parasitic Diseases
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Medicine > Department of Internal Medicine Kulliyyah of Medicine
Depositing User:	Asst. Dr. Ummu Afeera Zainulabid
Date Deposited:	04 Oct 2023 11:28
Last Modified:	04 Oct 2023 11:28
URI:	http://irep.iium.edu.my/id/eprint/106104

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