Original: Leptospirosis (also known as Weil's disease, Weil's syndrome, canicola fever, canefield fever,  nanukayami fever, 7-day fever, "Fort Bragg fever," and "Pretibial fever") is a bacterial zoonotic  disease caused by spirochaetes of the genus Leptospira that affects humans and a wide range of animals, including mammals, birds, amphibians, and reptiles.
Simplified: Leptospirosis (also known as Weil's disease, canicola fever, canefield fever,  nanukayami fever or seven day fever) is a bacterial  disease.