was there a result of a microbiological test in patient 14990's mrsa screen until 10/2104?
select count(*)>0 from microbiologyevents where microbiologyevents.hadm_id in ( select admissions.hadm_id from admissions where admissions.subject_id = 14990 ) and microbiologyevents.spec_type_desc = 'mrsa screen' and strftime('%y-%m',microbiologyevents.charttime) <= '2104-10'