I think the only thing your snake can give you is salmonella. That only comes from not washing your hands, and kissing. However, it is important to have a vet on hand. Respiratory infection is not dangerous to you, but it can take a snake down quickly if not treated. The only way to tell for internal parasites is a fecal exam from a vet.
Actually, it depends on the bacteria causing the RI. Some (such as Klebsiella Pneumonia) can be transmitted from reptile to human & vice versa.