Could antibiotic resistance genes get into people?  This possibility has been extensively tested using much, much higher concentrations of DNA containing an antibiotic resistance gene than would be ingested in food.  The results of a number of studies were negative.  That is, an antibiotic gene never been detected incorporated into a test organism’s DNA.  Even transfer to gut bacteria has not been detected, largely because bacteria rarely take up DNA.  And when they do, if it isn’t their own, they mark it and destroy it.  Antibiotic-resistance genes were often used in the early days of molecular modification.  More recent methods do not require introduction of an antibiotic resistance gene.