A na-eji ngwa a qualitatively chọpụta otu B streptococcus nucleic acid DNA in vitro rectal swabs, vaginal swabs ma ọ bụ rectal / ikpu agwakọta swabs nke ndị inyom dị ime nwere nnukwu ihe ize ndụ gburugburu 35 ~ 37 izu nke ime, na ndị ọzọ gestational izu nwere mgbaàmà ụlọ ọgwụ dị otú ahụ. dị ka mgbawa nke membranes, egwu ime nwa oge, wdg.