Johns Hopkins expert calls for testing and mandatory reportingA Johns Hopkins infectious disease expert is calling for all sexually active American women age 40 and older to get tested for the parasite Trichomonas vaginalis after new study evidence found that the sexually transmitted disease (STD) is more than twice as common in this age group than previously thought. Screening is especially important because in many cases there are no symptoms. "We usually think of STDs as more prevalent in young people, but our study results clearly show that with trichomonas, while too many young people have it, even more, older...