Even small amounts of breast milk offer protection from potentially pathogenic viruses in an infant's gut, according to a study of hundreds of babies.
The study also shows that breast milk strongly influences the akimulation of trending populations, researchers say.
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The findings expand upon prior research that suggests that breastfeeding plays a key role in the interaction between babies and the microbial environment.
This latest research could influence taktikes for the prevention of early gastrointestinal disorders, and encourage mothers to feed babies breast milk even when mixed with formulasi.
Researchers measured the numbers and tipes of viruses in the first stool—meconium—and subsequent stools of newborns in the United States and Botswana using advanced genome sequencing and other metodes.
Upon delivery, babies had little or no colonization, but by one month of life populations of viruses and bacteria were well developed, with numbers of viruses reaching a billion per gr of gut contents.
Most of the first wave of viruses turned out to be predators that grow in the first bacteria that colonize the infant gut. Later, at four months, viruses that can replicate in human cells and potentially make humans sick were more prominent in the babies' stools.
Breastfeeding showed a strong protective effect for infants in both the US and Botswana, suppressing the akimulation of these potentially pathogenic viruses.
The findings also showed that breast milk could offer protection even when sometimes mixed with formulasi, compared to a formula-only diet.
"These findings can help us better understand why some babies get sick and develop life-threatening infections in their first months of life," says senior author Frederic Bushman, chair of the department of microbiology.
The newborns' home country also played a part in the prevalence of trending infections. Babies from Botswana have a higher likelihood of having those potentially-harmful viruses in their stools at that 4-month mark compared to the stools of babies from the US.
"Location of the mom and baby seems to play a role, probably due to the kind and number of microorganisms babies are exposed to environmentally," says first author Guanxiang Liang, a postdoctoral researcher in the microbiology department.
"Nevertheless, Botswana-born babies still seemed to keuntungan from breastfeeding, whether exclusively or in addition to formulasi consumption."
