Acute Communicable Disease Control
Listeriosis, Perinatal

Perinatal listeriosis is a disease transmitted transplacentally from infected pregnant women; these women may experience
only mild flu-like symptoms or may be asymptomatic. A perinatal listeriosis case is defined as a mother-infant pair in which one
or both persons has a positive Listeria monocytogenes culture from a normally sterile site. Neonatal/infant listeriosis is often
divided into early onset (0–6 days after birth) and late onset (7–42 days after birth). Infection during pregnancy may lead to premature birth, stillbirth, or septicemia and/or meningitis in the neonate—even if the mother is asymptomatic. There is no vaccine to prevent listeriosis.

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