Which condition prevents breastfeeding due to risks of transmission?

Cytomegalovirus (CMV) poses a particular concern for breastfeeding, especially when the infant is premature. In these cases, the risk of transmission through breast milk is significant. While the majority of infants can generally tolerate maternal CMV, premature infants are at a higher risk for complications from the virus, including neurological disabilities and other health issues.

This risk is the primary reason that breastfeeding is discouraged for mothers who are known to be infected with CMV when they have a premature infant. Most other conditions listed, such as hypothyroidism, hypertension, and diabetes mellitus, do not have specific contraindications for breastfeeding in the same way and can often be managed while the mother continues to breastfeed, allowing the infant to benefit from the advantages of breast milk. This distinction clearly highlights the unique nature of CMV regarding breastfeeding particularly in vulnerable populations such as preterm infants.