Le khithi yenzelwe ukufunyaniswa komgangatho we-in vitro ye-nucleic acid ye-DNA yeqela B streptococcus kwiisampulu ze-rectal swab, iisampulu ze-vaginal swab okanye iisampulu ezixutyiweyo ze-rectal/vaginal swab kubasetyhini abakhulelweyo kwiiveki ezingama-35 ukuya kwezingama-37 zokumitha ezinemiba ephezulu yomngcipheko nakwezinye. iiveki zokumitha ezineempawu zeklinikhi ezinjengokugqabhuka kwenwebu kwangethuba kunye nokoyikiswa kokusebenza kwangaphambi kwexesha.