Key Findings

The study identified various tetracycline resistance genes, including tet(M), tet(L), erm(T), tet(W), tet(O), and tet(X), in the gut microbiota of a mother and her infant. It also discovered a novel composite transposon, Tn 6079, carrying tet(M), tet(L), and erm(T) in the infant's gut, highlighting the potential for horizontal gene transfer and maternal transmission of antibiotic resistance.