@anon44735 - I'm not sure what you mean? There are a lot of techniques used in molecular pathology. That just means the study of pathogens at a molecular level. They might study them under microscopes, or infect cells with them and study the results. They might use radiation, or staining or any number of things.
And then they might try different techniques to kill or manipulate the pathogens.
It really depends on what you want to find out. While molecular cell biology is a young science and it seems like a very difficult one in which to achieve anything, given the limitations of size, it's really cool how much people actually know and can do to find out more.
You might want to check out a molecular cell biology textbook if you want a more specific answer.