Relapsing fever is an infection transmitted by a louse or tick. It is characterized by repeated episodes of fever .
Tick-borne relapsing fever, Louse-borne relapsing fever
Causes, incidence, and risk factors
Relapsing fever is an infection caused by several species of bacteria in the Borrelia family.
There are two major forms of relapsing fever:
Tick-borne relapsing fever (TBRF) is transmitted by the Ornithodoros tick and occurs in Africa, Spain, Saudi Arabia, Asia, and certain areas in the western United States and Canada. The bacteria species associated with TBRF are Borrelia duttoni , Borrelia hermsii , and Borrelia parkerii .
Louse-borne relapsing fever (LBRF) is transmitted by body lice and is most common in Asia, Africa, and Central and South America. The bacteria species associated with LBRF is Borrelia recurrentis .
Sudden fever occurs within 2 weeks of infection. In LBRF, the fever usually lasts 3-6...
If you have a fever, your body temperature is higher than the normal temperature of about 98.6 degrees Fahrenheit. A fever isn't an illness, but a signal that your body is fighting something, usually an infection.
When you have a fever, you may feel warm, tired, or cold. Other symptoms may include:
cough or shortness of breath
burning or pain when urinating
lack of appetite
A fever is uncomfortable, but it's usually not dangerous unless your temperature is 103 degrees or higher. This may be the sign of severe infection.
Several breast cancer treatments can cause fever:
Herceptin (chemical name: trastuzumab), a targeted therapy
Several pain medications, such as ibuprofen and morphine can also cause fever.
If you're getting chemotherapy, you're more susceptible to infections because your white blood cell counts are lower than normal. (White blood cells are the cells t...
Alternative Names Legionella pneumonia; Pontiac fever Symptoms Symptoms tend to get worse during the first 4 - 6 days. They typically improve in another 4 - 5 days. Symptoms may include: Chest pain Coughing up blood Fever Gastrointestinal symptoms, such as diarrhea, nausea, vomiting, and abdominal pain General discomfort, uneasiness, or ill feeling ( malaise ) Headache Joint pain Lack of coordination ( ataxia ) Loss of energy Muscle aches and stiffness Nonproductive cough Shaking chills Shortness of breath Signs and tests The health care provider will perform a physical exam, and may hear abnormal sounds called crackles when listening to the chest with a stethoscope. Tests that may be done include: Arterial blood gases Chest x-ray Complete blood count ( CBC ), including white blood cell count Erythrocyte sedimentation rate Liver function tests Sputum or bronchoscopic culture for the Legionella bacteria Sputum or bronchoscopic indirect fluorescent antibody test for the Legionella bacteria Urine tests to check for Legio...
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