realized in inheres in location of material entity pathogen vehicle role I don't understand the rdfs comment indicating drinking water bears the infected agent vehicle role, but neither of the subtypes. Presumably, if an infectious agent is present in drinking water, then it bears a fomite role. Drinking water is, in fact, a classic example. -John Beverley I've expanded this definition and label to cover infectious agent pathogens and infectious structure pathogens. -John Beverley Albert Goldfain Alexander Diehl Lindsay Cowell A pathogen transporter role borne by an entity in virtue of the fact that the entity is not a complete organism. Drinking water bears the infectious agent vehicle role, but does not bear either of the subtype roles. infectious agent infectious structure pathogen transporter role organism indirect pathogen transmission process