with the objective of determining if specific sexually transmitted diseases ( stds ) are associated with prematurity ( birth weight less than or equal to 2500 g and gestational age less than or equal to 36 weeks ) , a case-control study was conducted to evaluate women for serologic evidence of syphilis and human immunodeficiency virus infection and microbiologic evidence of cervical infection with neisseria gonorrhoeae , chlamydia trachomatis , and haemophilus species and vaginal infection with genital mycoplasma , streptococcus agalactiae , and enterobacteriaceae .
C0019693
human
C0009450
infection