"Although many pathogens, including viruses, bacteria (including mycobacteria), fungi, and parasites can cause myositis, the most common infectious agent is the bacterium Staphylococcus aureus, accounting for over 75% of cases 1."
"In the appropriate scenario (e.g. puncture wound, IV drug use) one should carefully assess for a retained foreign body as a potentially infectious nidus. The presence of an abscess should be also sought by recognition of a discrete collection, classically (but non-uniformly) heterogenous and less echo-dense compared to adjacent tissues, which moves independently from the surrounding structures during dynamic graded compression (i.e. sonographic "fluctuance"). The presence of irregular echogenic collections with "dirty" posterior shadowing (i.e. gas) should evoke concern for a necrotising soft tissue infection. Ultrasound may also be employed to aid percutaneous drainage of a collection."
"Although many pathogens, including viruses, bacteria (including mycobacteria), fungi, and parasites can cause myositis, the most common infectious agent is the bacterium Staphylococcus aureus, accounting for over 75% of cases 1."
"The investing fascia may demonstrate structural abnormalities such as a loss of its sharply demarcated margins, increased thickness, and may be visibly disrupted or adopt an increasing degree of outward convexity from the oedematous expansion of the muscle within 8. Colour or power Doppler may demonstrate tissue hyperaemia in the absence of necrosis or the presence of an abscess (e.g. pyomyositis) 6. The corresponding contralateral area should be examined routinely, when possible; this may elucidate subtle structural derangements."
"In the appropriate scenario (e.g. puncture wound, IV drug use) one should carefully assess for a retained foreign body as a potentially infectious nidus. The presence of an abscess should be also sought by recognition of a discrete collection, classically (but non-uniformly) heterogenous and less echo-dense compared to adjacent tissues, which moves independently from the surrounding structures during dynamic graded compression (i.e. sonographic "fluctuance"). The presence of irregular echogenic collections with "dirty" posterior shadowing (i.e. gas) should evoke concern for a necrotising soft tissue infection. Ultrasound may also be employed to aid percutaneous drainage of a collection."