Detection methods for group B streptococcus mainly include fluorescent PCR method, traditional culture method, immunoassay method, and automatic microbial analysis and identification system, etc. At present, PCR fluorescent probe method is commonly used. The fluorescent PCR method, i.e., the use of genetic probes to detect vaginal and anal swab broth culture. Its advantages include the ability to produce results within 3 hours, high sensitivity, high specificity and good reproducibility. Compared with the results of traditional methods, the sensitivity and specificity were 90.1% and 97.5%, respectively. Under normal circumstances, infection of healthy people with group B streptococci is not pathogenic, but under certain conditions, it will be transformed from a colonized state to a pathogenic bacterium. Group B streptococci are also the primary causative agent of invasive infections such as meningitis and meningitis in newborns. It is recommended that women be tested for group B streptococcus nucleic acid during pregnancy and take prompt action in case of infection.