did patient 52898 have any microbiology test results in this month?
select count(*)>0 from microbiologyevents where microbiologyevents.hadm_id in ( select admissions.hadm_id from admissions where admissions.subject_id = 52898 ) and datetime(microbiologyevents.charttime,'start of month') = datetime(current_time,'start of month','-0 month')