In plain words
A biofilm is a community of bacteria that sticks to a surface and builds a protective coating around itself. Dental plaque is a familiar example. The coating makes it harder for the immune system and for many antibiotics to reach every cell. In breastfeeding, researchers have proposed that a biofilm can form inside milk ducts when bacteria, milk that stays in the breast, and changes in the microbes living there come together. This idea is one explanation for why some breast infections return. It is not yet proven in mothers. A mother who has repeat breast infections may hear the word from a or provider. The research on this question is still developing.
The deeper version
Biofilms are surface-attached microbial communities embedded in a self-produced matrix of polysaccharides, proteins, and extracellular DNA. The matrix confers tolerance to host defenses and to antimicrobials through reduced penetration, slow growth of subpopulations, and changes in gene expression (Costerton, Stewart, and Greenberg, Science, 1999). In the mammary context, one proposal holds that , a shift toward or coagulase-negative staphylococci that form biofilm within ducts, underlies recurrent or refractory , favored by antibiotic exposure, , and milk stasis. Direct demonstration of biofilm in human ducts is limited, and most evidence is indirect, drawn from culture and microscopy of milk and tissue. The concept helps explain persistence but remains a hypothesis for lactation.
Where it comes up
- Clogged ducts and mastitisPostpartum: Your Body
- Thrush and other nipple infectionsPostpartum: Your Body
- Keeping ducts clear: prevention habitsFeeding Your Baby
- Engorgement when milk comes inPostpartum: Your Body
- Signs of infection after birthPostpartum: Your Body
What mothers here say about biofilm
No one has posted under this term yet.
Sources
- Costerton JW, Stewart PS, Greenberg EP — Bacterial biofilms: a common cause of persistent infections. Science, 1999
- Academy of Breastfeeding Medicine — Clinical Protocol #36: The Mastitis Spectrum, 2022