Not exactly what you are looking for but similar flavor. The most obvious option to me is liar. claim, verb. state or assert that something is the case, typically without providing evidence or proof. purport, verb. to claim to be or do a particular thing when this claim may not be true.
Background. Leptospirosis is an infectious disease of humans and animals that is caused by pathogenic spirochetes of the genus Leptospira. It is considered the most common zoonosis in the world.Leptospirosis is distributed worldwide (sparing the polar regions) but is most common in the tropics.Leptospirosis has been recognized as a re-emerging infectious disease among animals and humans and has the potential to become even more prevalent with advancing climate change and related trends.eptospirosis is distributed worldwide (sparing the polar regions) but is most common in the tropics. Leptospirosis has been recognized as a re-emerging infectious disease among animals and humans and has the potential to become even more prevalent with advancing climate change and related trends.
Leptospirosis. Leptospirosis is a disease caused by infection with Leptospira bacteria. These bacteria can be found worldwide in soil and water. There are many strains of Leptospira bacteria that can cause disease.Leptospirosis is a zoonotic disease, which means it can be spread from animals to people.Infection in people can cause flu-like symptoms and can cause liver or kidney disease.In the United States, most cases of human leptospirosis result from recreational activities involving water.eptospirosis is a zoonotic disease, which means it can be spread from animals to people. Infection in people can cause flu-like symptoms and can cause liver or kidney disease. In the United States, most cases of human leptospirosis result from recreational activities involving water.