did any organisms were found in patient 53863's first staph aureus screen microbiology test until 03/2101?
select count(*)>0 from microbiologyevents where microbiologyevents.hadm_id in ( select admissions.hadm_id from admissions where admissions.subject_id = 53863 ) and microbiologyevents.spec_type_desc = 'staph aureus screen' and microbiologyevents.org_name is not null and strftime('%y-%m',microbiologyevents.charttime) <= '2101-03' order by microbiologyevents.charttime asc limit 1