Definition of undulant fever in US English:

undulant fever


  • Brucellosis in humans.

    • ‘Thus undulant fever, a particularly debilitating illness that often led to rheumatism, became known as Malta fever - to which many Maltese objected.’
    • ‘For example bacteria in unpasteurized milk have been known to infect those who drink it with polio, tuberculosis, typhoid, diphtheria, undulant fever, and foot and mouth disease.’
    • ‘It can also be passed to humans, causing a chronic ailment known as undulant fever.’
    • ‘This provision is extended to enteric fever, dysentery, diphtheria, scarlet fever, acute inflammation of the throat, gastroenteritis, and undulant fever.’
    • ‘It can also bring about undulant fever in humans.’


Late 19th century: so named because of the intermittent fever associated with the disease.