there is a microbiology test record for patient 3663's mrsa screen until 09/2105?
select count(*)>0 from microbiologyevents where microbiologyevents.hadm_id in ( select admissions.hadm_id from admissions where admissions.subject_id = 3663 ) and microbiologyevents.spec_type_desc = 'mrsa screen' and strftime('%y-%m',microbiologyevents.charttime) <= '2105-09'