Genomic atlas of Bifidobacterium infantis and B. longum informs infant probiotic design
Highlights • Genome catalog of 4,098 B. infantis and B. longum shows distinct biogeography and ecology • B. infantis is depleted in Westernized populations but highly common in LMIC infants • Massively expanded B. infantis diversity and functions are absent from current probiotics • Geo-specific strain library informs diet- and population-tailored infant probiotic design