Some infectious diseases can cause muscle weakness. They include: Influenza: The influenza (flu) virus can cause temporary muscle weakness as well as a fever, sore throat, cough, and fatigue. Lyme disease: This inflammatory disease follows a bite from an infected tick.
The most frequent viral causes of myositis are the influenza viruses and enteroviruses, with symptoms of myositis typically starting a few days after the onset of fever.
Viruses or bacteria may invade muscle tissue directly, or release substances that damage muscle fibers. Common cold and flu viruses, as well as HIV, are just a few of the viruses that can cause myositis.
Pyomyositis (sometimes called tropical pyomyositis) is a rare and treatable bacterial infection that affects skeletal muscles (the muscles you use to move). Pyomyositis usually results in an abscess (a swollen area that contains pus) that forms in your muscle.
Infections
Some infectious diseases can cause muscle weakness. They include: Influenza: The influenza (flu) virus can cause temporary muscle weakness as well as a fever, sore throat, cough, and fatigue. Lyme disease: This inflammatory disease follows a bite from an infected tick.
Muscular dystrophy is a group of inherited diseases characterized by weakness and wasting away of muscle tissue, with or without the breakdown of nerve tissue. There are 9 types of muscular dystrophy, with each type involving an eventual loss of strength, increasing disability, and possible deformity.
What is muscular dystrophy? Muscular dystrophy (MD) refers to a group of more than 30 genetic diseases that cause progressive weakness and degeneration of skeletal muscles used during voluntary movement. These disorders vary in age of onset, severity, and pattern of affected muscles.
Mild to moderate myalgia is a common symptom in acute viral infection. Patients commonly complain of back and leg pain, and examination may reveal muscle tenderness and edema [3]. Symptoms are often self-limited.
Pathologic atrophy is seen with aging, starvation, and diseases such as Cushing disease (because of taking too much medicines called corticosteroids). Neurogenic atrophy is the most severe type of muscle atrophy. It can be from an injury to, or disease of a nerve that connects to the muscle.
In some cases, myositis is a short-term problem that goes away after a few days or weeks. In other cases, it is part of a chronic (long-term) condition. Chronic forms of myositis can lead to muscle atrophy (wasting and shrinking) and severe disability.
Polymyositis is a rare inflammatory disease characterized by degenerative changes in muscles and supporting connective tissue. Muscle weakness may occur rapidly and affect the neck, trunk, and upper arms and legs.
Doctors use a blood test to look for elevated levels of a substance called creatine kinase, which is released into the bloodstream when muscle fibers deteriorate. Elevated levels may mean you have an inflammatory myopathy.
Myositis (my-o-SY-tis) is a rare type of autoimmune disease that inflames and weakens muscle fibers. Autoimmune diseases occur when the body's own immune system attacks itself. In the case of myositis, the immune system attacks healthy muscle tissue, which results in inflammation, swelling, pain, and eventual weakness.
Nevertheless, myositis is a serious illness that, in most cases, needs to be treated aggressively. With inadequate or no treatment, myositis can cause significant disability and even death. There is no cure for any of the forms of myositis.
Among metabolic myopathies that can mimic myositis are disorders of carbohydrate metabolism such as McArdle's disease, 6-phosphofructokinase deficiency, and Pompe's disease (adult acid maltase deficiency); disorders of lipid metabolism such as carnitine deficiency and carnitine palmitoyltransferase 2 (CPT2) deficiency; ...
The diagnosis of myositis involves a complete physical exam, blood test, electromyography (a neurological test that assess the electrical activity in your muscles), and a muscle biopsy, which involves removing a small sample of muscle tissue for testing.
Once considered a tropical disease, it is now seen in temperate climates as well, particularly with the emergence of HIV infection. In addition to HIV, other viruses, bacteria (including mycobacteria), fungi, and parasites can cause myositis.