Gonna vary wildly based on what the specific oink in question has been exposed to. (You are aware that pigs are a reservoir for flu, among other things, right?) Some will be effectively "bug free", others may be loaded with any of several "flavors" of zoonotic bugs.I'm not interested, just curious. Would there be a risk of catching some kind of disease?
"Know thy partner" is wise advice when pondering a critter to put your pecker in/put his pecker in you. Keep in mind that if you can catch "it" (for whatever value of "it" might apply) from sex with them, you're at just about the same risk of catching "it" from non-sex contact with them.