Practice is based on peer reviewed, tested evidence (usually) as well as standard of care. Research on theoretical causes or supposition doesn't necessarily always translate to clinical practice. And if it does, then one has to move on to diagnostic tests and they have to be reproducible as well as accurate, sensitive, specific, etc. The first step is to posit a theory as to cause of disease, but actually integrating this into practice is many steps down the road. While it is an interesting theory that viruses like this could be the cause of certain diseases, from what I know it is far from certified fact.
So as of now your question is more research based than anything else. Many pathologists do do research, however, but that covers almost the entire spectrum as well.
