Glanders is a contagious zoonotic infectious disease that occurs primarily in horses, mules, and donkeys. It can be contracted by other animals, such as dogs, cats, pigs, goats, and humans. It is caused by infection with the bacterium Burkholderia mallei.

Glanders is endemic in Africa, Asia, the Middle East, and Central and South America. It has been eradicated from North America, Australia, and most of Europe through surveillance and destruction of affected animals, and import restrictions. It has not been reported in the United States since 1945, except in 2000, when an American lab researcher had an accidental exposure in the lab. It is a notifiable disease in the UK, although it has not been reported there since 1928.

The term is from Middle English glaundres or Old French glandres, both meaning glands. Other terms include Latin: malleus, Spanish: muermo, German: Rotz and Norwegian: snive.