Typhus
Murine typhus; Epidemic typhus; Endemic typhus; Brill-Zinsser disease; Jail feverTyphus is a bacterial disease spread by lice or fleas.
Causes
Typhus is caused by two types of bacteria: Rickettsia typhi or Rickettsia prowazekii.
Rickettsia typhi causes endemic or murine typhus.
- Endemic typhus is uncommon in the United States. It is usually seen in areas where hygiene is poor, and the temperature is cold. Endemic typhus is sometimes called "jail fever." The bacteria that cause this type of typhus is usually spread from rats to fleas to humans.
- Murine typhus occurs in the southern United States, including California and Texas. It is often seen during the summer and fall. It is rarely deadly. You are more likely to get this type of typhus if you are around rat feces or fleas, and other animals such as cats, possums, raccoons, and skunks.
Rickettsia prowazekii causes epidemic typhus. It is spread by lice.
Brill-Zinsser disease is a mild form of epidemic typhus. It occurs when the bacteria become active again in a person who was previously infected. It is more common in older adults.
Symptoms
Symptoms of murine or endemic typhus may include:
- Abdominal pain
- Backache
- Dull red rash that begins on the middle of the body and spreads
- Fever, can be extremely high, 105°F to 106°F (40.6°C to 41.1°C) and can last up to 2 weeks
- Hacking, dry cough
- Headache
- Joint and muscle pain
- Nausea and vomiting
Symptoms of epidemic typhus may include:
- High fever, chills
- Confusion, decreased alertness, delirium
Delirium
Delirium is sudden severe confusion due to rapid changes in brain function that can occur with physical or mental illness.
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- Severe muscle and joint pain
- Lights that appear very bright; light may hurt the eyes
- Low blood pressure
- Rash that begins on the chest and spreads to the rest of the body (except the palms of the hands and soles of the feet)
- Severe headache
The early rash is a light rose color and fades when you press on it. Later, the rash becomes dull and red and does not fade. People with severe typhus may also develop small areas of bleeding into the skin.
Exams and Tests
Diagnosis is often based on a physical examination and detailed information about the symptoms. You may be asked if you recall being bitten by fleas. If the health care provider suspects typhus, you will be started on medicines right away. Blood tests will be ordered to confirm the diagnosis.
Treatment
Treatment includes the following antibiotics:
- Doxycycline
- Tetracycline
- Chloramphenicol (less common)
Tetracycline taken by mouth can permanently stain teeth that are still forming. Tetracycline is usually not prescribed for:
- Children until after all of their permanent teeth have grown
- Pregnant women
People with epidemic typhus may need oxygen and intravenous (IV) fluids.
Intravenous
Intravenous means "within a vein. " Most often it refers to giving medicines or fluids through a needle or tube inserted into a vein. This allows th...
Read Article Now Book Mark ArticleOutlook (Prognosis)
People with epidemic typhus who receive treatment quickly should completely recover. Without treatment, death can occur, with those over age 60 having the highest risk of death.
Only a small number of untreated people with murine typhus may die. Prompt antibiotic treatment will cure nearly all people with murine typhus.
Possible Complications
Typhus may cause these complications:
- Renal insufficiency (kidneys cannot function normally)
Renal insufficiency
Acute kidney failure is the rapid (less than 2 days) loss of your kidneys' ability to remove waste and help balance fluids and electrolytes in your b...
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Pneumonia
Pneumonia is a breathing (respiratory) condition in which there is an infection of the lung. This article covers community-acquired pneumonia (CAP). ...
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Central nervous system
The central nervous system is composed of the brain and spinal cord. Your brain and spinal cord serve as the main "processing center" for your entir...
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When to Contact a Medical Professional
Contact your provider if you develop symptoms of typhus. This serious disorder can require emergency care.
Prevention
Avoid being in areas where you might encounter rat fleas or lice. Good sanitation and public health measures reduce the rat population.
Lice
Body lice are tiny insects (scientific name is Pediculus humanus corporis) that are spread through close contact with other people. Two other types o...
Measures to get rid of lice when an infection has been found include:
- Bathing
- Boiling clothes or avoiding infested clothing for at least 5 days (lice will die without feeding on blood)
- Using insecticides (10% DDT, 1% malathion, or 1% permethrin)
References
Blanton LS, Dumler JS, Walker DH. Rickettsia typhi (murine typhus). In: Bennett JE, Dolin R, Blaser MJ, eds. Mandell, Douglas, and Bennett's Principles and Practice of Infectious Diseases. 9th ed. Philadelphia, PA: Elsevier; 2020:chap 190.
Blanton LS, Walker DH. Rickettsia prowazekii (epidemic or louse-borne typhus). In: Bennett JE, Dolin R, Blaser MJ, eds. Mandell, Douglas, and Bennett's Principles and Practice of Infectious Diseases. 9th ed. Philadelphia, PA: Elsevier; 2020:chap 189.
Fournier PE, Raoult D. Rickettsial infections. In: Goldman L, Schafer AI, eds. Goldman-Cecil Medicine. 26th ed. Philadelphia, PA: Elsevier; 2020:chap 311.
Body louse, female and larvae - illustration
This is a magnified view of a female body louse with larvae. Lice cause itching and a characteristic excoriated skin rash (looks like a scrape). They may also transmit diseases, including relapsing fever, typhus, and trench fever. (Image courtesy of the Centers for Disease Control and Prevention.)
Body louse, female and larvae
illustration
Flea - illustration
Different types of fleas prefer specific animals as hosts, but will infest humans if their specific hosts are unavailable. Fleas can carry plague and typhus. They are also thought to transmit several other diseases. (Image courtesy of the Centers for Disease Control and Prevention.)
Flea
illustration
Body louse, female and larvae - illustration
This is a magnified view of a female body louse with larvae. Lice cause itching and a characteristic excoriated skin rash (looks like a scrape). They may also transmit diseases, including relapsing fever, typhus, and trench fever. (Image courtesy of the Centers for Disease Control and Prevention.)
Body louse, female and larvae
illustration
Flea - illustration
Different types of fleas prefer specific animals as hosts, but will infest humans if their specific hosts are unavailable. Fleas can carry plague and typhus. They are also thought to transmit several other diseases. (Image courtesy of the Centers for Disease Control and Prevention.)
Flea
illustration
Review Date: 12/4/2022
Reviewed By: Jatin M. Vyas, MD, PhD, Associate Professor in Medicine, Harvard Medical School; Associate in Medicine, Division of Infectious Disease, Department of Medicine, Massachusetts General Hospital, Boston, MA. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.
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