No, the research presented above says the organisms can be detected there. It says nothing of whether or not you can actually contract one of the diseases (though it is gross nonetheless). There have been zero documented cases of someone getting an STD from a toilet.

The research described above is interesting because being able to know exactly what diseases are prevalent in a given community, quickly, and with out the need to test hundreds of individual people can lead to quicker determining the best treatments for that particular community (IE which drugs work best on the particular variants present there).