when is the last direct antigen test for herpes simplex virus types 1 & 2 microbiological test on patient 50065 since 107 months ago?
select microbiologyevents.charttime from microbiologyevents where microbiologyevents.hadm_id in ( select admissions.hadm_id from admissions where admissions.subject_id = 50065 ) and microbiologyevents.spec_type_desc = 'direct antigen test for herpes simplex virus types 1 & 2' and datetime(microbiologyevents.charttime) >= datetime(current_time,'-107 month') order by microbiologyevents.charttime desc limit 1