The efficacy of 2002 CDC guidelines in preventing perinatal group B Streptococcal vertical transmission: a prospective study. Posted on 1 May 200714 February 2020 by admin Lijoi D, Capua ED, Ferrero S, Mistrangelo E, Giannattasio A, Morano S, Ragni N. The efficacy of 2002 CDC guidelines in preventing perinatal group B Streptococcal vertical transmission: a prospective study. Arch Gynecol Obstet 2007;275:373-379.https://link.springer.com/article/10.1007/s00404-006-0263-7