Is IBS contagious and infectious?

If I stand in the same room with a person who has Irritable Bowel Syndrome, does it mean his germ will pass into my body? I am very afraid because one of my friend has IBS and he suffers lot of stomach pains and problems. I have been avoiding contact with him for safety reasons. He is to visit my house and I am feeling very nervous and scared if his stomach troubles will transfer into my stomach?