What is a common etiology of puerperal breast abscess?

Puerperal breast abscesses, which can occur during the postpartum period, are most commonly associated with Staphylococcus aureus. This bacterium is known to infect breast tissue, particularly during lactation and can lead to infection in the presence of milk stasis or cracked nipples. The skin flora of the breast contains Staphylococcus aureus, and its ability to form biofilms makes it proficient in establishing infections, especially when the skin barrier is compromised.

In the context of breast abscesses, Staphylococcus aureus can traverse through damaged skin or enter through the nipple when there are fissures or trauma, leading to localized infection and abscess formation. Additionally, this organism is notable for causing significant infections in lactating women due to its prevalence in the environment and its capacity to cause severe infections, impacting both maternal and infant health.

The other organisms listed, while they can cause infections in various contexts, are less commonly associated with puerperal breast abscesses.