Serum antibodies to Escherichia coli in breast-fed and bottle-fed infants

Area of Science:

• Immunology
• Pediatrics
• Microbiology

Background:

• Human milk contains antibodies crucial for infant immunity.
• Escherichia coli (E. coli) is a common bacterium affecting infants.
• Understanding infant immune responses to E. coli is vital for health.

Purpose of the Study:

• To investigate the presence and levels of antibodies against Escherichia coli (E. coli) in human milk and infant sera.
• To compare antibody titers in breast-fed, bottle-fed, and post-weaning infants.
• To assess the role of maternal antibodies in protecting infants against E. coli.

Main Methods:

• Passive hemagglutination method was used to measure antibody titers.
• Samples were collected from human milk and infant sera.
• Infant groups included breast-fed, bottle-fed, and post-weaning infants.

Main Results:

• High E. coli antibody titers were found in human milk during the first four days postpartum, decreasing rapidly thereafter.
• Healthy breast-fed infants showed no detectable serum antibodies against E. coli.
• A breast-fed infant with an E. coli abscess had detectable antibodies, as did 4/6 bottle-fed infants and all 9 post-weaning infants.

Conclusions:

• Maternal antibodies in early human milk may provide temporary protection against E. coli.
• Infants rely on their own immune systems to develop antibodies against E. coli after the initial doğum period.
• Bottle-feeding and post-weaning stages are associated with the development of infant serum antibodies against E. coli.