If by "risk" you meant the horizontal transfer of resistance, then I point you at genomic studies of horizontal gene transfer across bacteria. It happens with s

If by "risk" you meant the horizontal transfer of resistance, then I point you at genomic studies of horizontal gene transfer across bacteria. It happens with such regularity that the concept of a species cannot be naively applied to bacteria. https://scholar.google.com/scholar?q=horizontal+gene+transfer+genomes https://scholar.google.com/scholar?q=horizontal+gene+transfe...