Vertaling van "very closely related one can assume " (Nederlands → Frans) :

If the majority of these isolates appear identical or very closely related one can assume that the epidemic is clonal and that nosocomial transmission is probable.
Si la majorité de ces isolats semblent identiques ou très étroitement liés, on peut supposer que l'épidémie est clonale et qu’une transmission nosocomiale est probable.