instruction: tell me the last specimen test given to patient 51177 in 10/2105?
response: SELECT microbiologyevents.spec_type_desc FROM microbiologyevents WHERE microbiologyevents.hadm_id IN (SELECT admissions.hadm_id FROM admissions WHERE admissions.subject_id = 51177) AND STRFTIME('%y-%m', microbiologyevents.charttime) = '2105-10' ORDER BY microbiologyevents.charttime DESC LIMIT 1