"All camels have syphilis"

Everyone loves an intriguing bit of trivia to be mentioned at cocktail parties as proof of the speaker's cleverness and depth of knowledge, but this is my all time favorite fun fact. How true is it? The Internet, infallible source of truth that it is, has little to say on the subject, though apparently you don't need to start scarfing the penicillin if a camel spits at you.

Also, it raises the related question: can you get syphilis from smoking Camels?