1) Ancona RJ, Ferrieri P, Williams PP : Maternal factors that enhance the acquisition of group-B streptococci by newborn infants. J Med Microbiol 13 (2) : 273-280, 1980
2) Pass MA, Gray BM, Khare S : Prospective studies of group B streptococcal infections in infants. J Pediatr 95 (3) : 437-443, 1979
4) Phares CR, Lynfield R, Farley MM et al, Active Bacte- rial Core surveillance/Emerging Infections Program Network : Epidemiology of invasive group B streptococ- cal disease in the United States, 1999-2005 : JAMA 299 (17) : 2056-2065, 2008