Pyomyositis (muscle infection)
About Pyomyositis (muscle infection)
A bacterial infection of the muscle. The most common bacterial cause is Staphylococcus with Methicillin Resistant Staphylococcus Aureus (MRSA) becoming more common. The disorder usually begins as an infection in the blood stream that spreads to the muscle. Traumatic injury of the muscle increases the likelihood of this disease. Three fourths of all patients have a weakened immune system either from disease such as HIV or from medications such as chemotherapy. Pyomyositis is most often seen in children aged 2-5 but this order can occur in any age group. The muscles of the pelvis and legs are most commonly affected. The disease is more commonly encountered in tropical regions. Left untreated the infection can involve other organs and lead to death (sepsis).Symptoms
Fever, pain in the affected muscle, tenderness, muscle swelling, problems walking if the pelvis or legs are involved. Later in the course redness of the skin and increased warmth of the skin may occur. Low blood pressure, fainting, confusion and death can occur if the infection is untreated.Tests & Diagnostics
A history and physical exam will be done. A MRI is the best test to confirm the diagnosis. A CT scan can also be used. Blood tests such as a complete blood count (CBC) and blood cultures may be performed.Common tests: CT Scan, MRI.
Prescription medications
Conventional treatment summary
Broad spectrum intravenous antibiotics with coverage against MRSA is given. If a collection of pus (abscess) is present or the bone is involved surgery is needed to remove the infected tissue.Medical specialties
Orthopedic Surgery · Infectious Disease Medicine · Pediatric Infectious Disease Medicine · Pediatric Orthopedic Surgery
This page is educational content, not medical advice. Always consult a qualified clinician for diagnosis and treatment of Pyomyositis (muscle infection).