what is swamp fever in humans
â¢ SWAMP FEVER (noun). The noun SWAMP FEVER has 1 sense: 1. an infectious disease cause by leptospira and transmitted to humans from domestic animals; characterized by jaundice and fever. Familiarity information: SWAMP FEVER used as a noun is very rare. SWAMP FEVER (noun). The noun SWAMP FEVER has 1 sense: 1. an infectious disease cause by leptospira and transmitted to humans from domestic animals; characterized by jaundice and fever. Familiarity information: SWAMP FEVER used as a noun is very rare.