Question

do all microbes present in human milk only have the ability to be beneficial? what about harmful? how in comparison to other milk if so

Answer 1

The human milk microbiota which could be source of commensal, mutualistic, and potentially probiotic bacteria to the infant gut microbiota.

Breast milk is a natural source of lactic acid bacteria for the newborn through breastfeeding, and may be considered a symbiotic food.

Human milk is a source of live Staphylococci, Streptococci, lactic acid bacteria, Bifidobacteria, Propionibacteria, Corynebacteria, and closely related Gram-positive bacteria for the infant gut.

Bacteria commonly isolated in human milk samples include Bifidobacterium, Lactobacillus, Staphylococcus, Streptococcus, Bacteroides, Clostridium, Micrococcus, Enterococcus, and Escherichia.

Both human and macaque milks contains high abundances of Streptococcus and Lactobacillus bacteria, but differ in their respective relative abundances of these taxa.

Bacteria observed to be most common in healthy bovine milk include ;

Pseudomonas, Corynebacterium, Staphylococcus, Faecalibacterium, Propionibacterium, Aeribacillus, Bacteroides, Streptococcus, Anaerococcus, Lactobacillus, Fusobacterium, Enterococcus..etc.