What is the primary concern for a 6-day-old infant who is exclusively breastfed and has jaundice?

In the context of a 6-day-old exclusively breastfed infant with jaundice, the primary concern is related to high bilirubin levels. Jaundice in newborns is typically caused by an elevated level of bilirubin in the blood, which can lead to kernicterus if not managed appropriately.

In breastfed infants, jaundice can often be physiological, resulting from the immature liver function in processing bilirubin. However, it is crucial to closely monitor bilirubin levels to determine if they are rising to a concerning degree. High levels can be particularly problematic because they can indicate the risk of more severe complications, including brain damage.

While weight loss and reduced stool output are also significant factors to consider in managing the health of a newborn, the primary concern related specifically to jaundice in this case would be the monitoring and management of bilirubin levels. A normal physical exam would provide reassurance but does not address the underlying issue of potential bilirubin elevation, which is critical in a jaundiced infant. Therefore, the focus on high bilirubin levels is essential in ensuring the infant's health and preventing any potential complications associated with elevated bilirubin.