Unlabelled: The colostrum bacteriome of primiparous (P) and multiparous (M) Holstein cows was analysed by 16S rRNA sequencing. The species richness (Chao 1), diversity (Shannon and Simpson), and beta diversity did not differ between cow groups. The phyla , , and were more abundant in M cows, while , , and were more abundant in P cows. At the genus level, no significant differences were observed between groups ( < 0.05), and _1 was the most abundant taxon. P and M cows shared 1030 taxonomic operational units (OTUs), with showing greater abundance. In conclusion, parity did not affect the colostrum bacteriome of P and M cows and a healthy mammary gland could represent a reservoir of in dairy farms.
Supplementary Information: The online version contains supplementary material available at 10.1007/s12088-022-01016-x.
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