In humans, fever, chills, headache, muscle aches, and a dry cough.
Pneumonia is often evident on chest x-ray.
Since 1996, fewer than 50 confirmed cases were reported in the United States each year. Many more cases may occur that are not correctly diagnosed or reported. Sequelae Endocarditis, hepatitis, and neurologic complications may occasionally occur. Severe pneumonia requiring intensive-care support may also occur. Fatal cases have been reported.