Leptospirosis
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Leptospirosis

Definition

Leptospirosis is a rare and severe infection that occurs when you come in contact with Leptospira bacteria.

Alternative Names

Weil disease; Icterohemorrhagic fever; Swineherd's disease; Rice-field fever; Cane-cutter fever; Swamp fever; Mud fever; Hemorrhagic jaundice; Stuttgart disease; Canicola fever

Causes

The Leptospira bacteria can be found in fresh water that has been contaminated by animal urine. The infection occurs in warmer climates.

It is not spread from person to person, except in vary rare cases when it is spread through breast milk or from a mother to her unborn child.

Risk factors include:

  • Occupational exposure -- farmers, ranchers, slaughterhouse workers, trappers, veterinarians, loggers, sewer workers, rice field workers, and military personnel
  • Recreational activities -- fresh water swimming, canoeing, kayaking, and trail biking in warm areas
  • Household exposure -- pet dogs, domesticated livestock, rainwater catchment systems, and infected rodents

Leptospirosis is rare in the continental United States. Hawaii has the highest number of cases in the United States.

Symptoms

Symptoms can take 2 - 26 days (average 10 days) to develop, and may include:

  • Dry cough
  • Fever
  • Headache
  • Muscle pain
  • Nausea, vomiting, and diarrhea
  • Shaking chills

Less common symptoms include:

  • Abdominal pain
  • Abnormal lung sounds
  • Bone pain
  • Conjunctivitis
  • Enlarged lymph glands
  • Enlarged spleen or liver
  • Joint aches
  • Muscle rigidity
  • Muscle tenderness
  • Skin rash
  • Sore throat

Exams and Tests

The blood is tested for antibodies to the bacteria.

Other tests that may be done:

Treatment

Medications to treat leptospirosis include:

  • Ampicillin
  • Azithromycin
  • Ceftriaxone
  • Doxycycline
  • Penicillin

Complicated or serious cases may need supportive care or treatment in a hospital intensive care unit (ICU).

Outlook (Prognosis)

The outlook is generally good. However, a complicated case can be life-threatening if it is not treated promptly.

Possible Complications

  • Jarisch-Herxheimer reaction when penicillin is given
  • Meningitis
  • Severe bleeding

When to Contact a Medical Professional

Contact your health care provider if you have any symptoms of, or risk factors for, leptospirosis.

Prevention

Avoid areas of stagnant water, especially in tropical climates. If you are exposed to a high risk area, taking doxycycline or amoxicillin may decrease your risk of developing this disease.

References

Ko AI. Leptospirosis. In Goldman L, Schafer AI, eds. Cecil Medicine. 24th ed. Philadelphia, Pa: Saunders Elsevier; 2011:chap 331.

Levett PN, Haake DA. Leptospira species (leptospirosis). In:Mandell GL, Bennett JE, Dolin R, eds. Principles and Practice of Infectious Diseases. 7th ed. Philadelphia, Pa: Elsevier Churchill Livingstone; 2009:chap 240.


Review Date: 9/3/2012
Reviewed By: David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M. Health Solutions, Ebix, Inc.
The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
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