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Other Names: Burkholderia mallei; Burkholderia mallei infection

Glanders is an infectious disease that is caused by the bacterium Burkholderia mallei. While people can get the disease, glanders is primarily a disease affecting horses. It also affects donkeys and mules and can be naturally contracted by other mammals such as goats, dogs, and cats.


Glanders is an infectious disease that is caused by the bacterium Burkholderia mallei.


Those who care for affected animals or handle infected specimens may also face an increased risk. Such persons can include:

  • Veterinarians
  • Horse Caretakers
  • Laboratorians
  • Equine Butchers
  • Abattoir Workers


No naturally occurring cases of glanders have been reported in the United States since the 1940s. However, there are sporadic reports of glanders from the following regions:

  • Africa
  • Asia
  • The Middle East
  • Central America
  • South America


The bacteria that cause glanders are transmitted to humans through contact with tissues or body fluids of infected animals. The bacteria enter the body through cuts or abrasions in the skin and through mucosal surfaces such as the eyes and nose.

It may also be inhaled via infected aerosols or dust contaminated by infected animals. Sporadic cases have been documented in veterinarians, horse caretakers, and laboratorians. Cases of human-to-human transmission have not been reported in the U.S.


Symptoms of glanders commonly include:

  • Fever with chills and sweating
  • Muscle aches
  • Chest pain
  • Muscle tightness
  • Headache
  • Nasal discharge
  • Light sensitivity (sometimes with excessive tearing of the eyes)

Types of infection

The particular symptoms experienced, however, will vary depending on the type of infection. The four types of infections, along with the symptoms associated with each, are listed below.

Localized Infection If there is a cut or scratch in the skin, a localized infection with ulceration may develop within 1 to 5 days at the site where the bacteria entered the body. Swollen lymph nodes may also be apparent. Infections involving the mucous membranes in the eyes, nose, and respiratory tract will cause increased mucus production from the affected sites. Dissemination to other locations in the body may occur 1-4 weeks after infection.

Pulmonary Infection Glanders often manifests itself as pulmonary infection. In pulmonary infections, pneumonia, pulmonary abscesses, and pleural effusion can occur. Chest X-rays will show localized infection in the lobes of the lungs.

Bloodstream Infection Without treatment, glanders bloodstream infections are usually fatal within 7 to 10 days.

Chronic Infection The chronic form of glanders involves multiple abscesses within the muscles and skin of the arms and legs or in the lungs, spleen, and/or liver.


The mallein test is a sensitive and specific clinical test for glanders. Mallein (ATCvet code: QI05AR01 (WHO)), a protein fraction of the glanders organism (B. mallei), is injected intradermopalpebrally or given by eye drop. In infected animals, the eyelid swells markedly in 1 to 2 days.


Since human cases of glanders are rare, there is limited information about antibiotic treatment in humans. Sulfadiazine has been found to be effective in experimental animals and in humans. In addition, the bacterium that causes glanders is usually susceptible to:


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