Unusual report of diaper rash in a premature infant with group B streptococcal infection.

We present the case of a 980-g, female, premature infant with a late-onset maternofetal sepsis, of which the first sign was a diaper-shaped cellulitis. This dermatologic sign in a premature infant is very unusual and needs prompt investigation. Late-onset group B Streptococcus infection can be manifested by a cellulitis-adenitis syndrome.