english: So you might be wondering whether we can  also do this sort of thing across species, and it turns out that if you take microbes from an obese person and transplant them into mice you've raised germ-free, those mice will also become fatter than if they received the microbes from a lean person, but we can design a microbial community that we inoculate them with that prevents them from gaining this weight.
non_english: Možno vás zaujíma, či sa takéto veci dajú robiť aj medzidruhovo a naozaj, keď vezmete mikróby obézneho človeka a transplantujete ich do myši, ktorá nemala žiadne vlastné, taká myš bude tlstnúť viac, než keby dostala mikróby štíhleho človeka. Ale vieme pripraviť mikrobiálnu komunitu, ktorou myš naočkujeme, a tá priberaniu zabráni.