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These include drugs used to treat cancer antibiotics, such as penicillin and sulfonamide drugs some anti-seizure medications and some illegal substances, such as cocaine. Medications or illegal drugs that might cause an allergic or toxic reaction.
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Myocarditis also sometimes occurs if you're exposed to: Yeast infections, such as candida molds, such as aspergillus and other fungi, such as histoplasma, often found in bird droppings, can sometimes cause myocarditis, particularly in people with weakened immune systems. Chagas disease is much more common in Central and South America than in the United States, but it can occur in travelers and in immigrants from that part of the world. Among these are such parasites as Trypanosoma cruzi and toxoplasma, including some that are transmitted by insects and can cause a condition called Chagas disease. Bacteria that can cause myocarditis include staphylococcus, streptococcus, the bacterium that causes diphtheria and the tick-borne bacterium responsible for Lyme disease. It's also common in people with HIV, the virus that causes AIDS. Gastrointestinal infections (echoviruses), mononucleosis (Epstein-Barr virus) and German measles (rubella) also can cause myocarditis. Many viruses are commonly associated with myocarditis, including the viruses that cause the common cold (adenovirus) COVID-19 hepatitis B and C parvovirus, which causes a mild rash, usually in children (fifth disease) and herpes simplex virus. There are many potential causes but the risk of developing myocarditis is rare. Often, the cause of myocarditis isn't identified. Request an Appointment at Mayo Clinic Causes If you have severe symptoms, go to the emergency room or call for emergency medical help. If you've had an infection, watch for the symptoms of myocarditis and let your doctor know if they occur. Get emergency medical help if you have unexplained chest pain and shortness of breath. Symptoms of myocarditis can resemble a heart attack.
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If you are having unexplained chest pain and shortness of breath, seek emergency medical help. Sometimes, myocarditis symptoms may be similar to a heart attack.