[A dynamic study of drug resistance in populations of fecal "Escherichia coli" from axenic mice, fed chlortetracycline continuously and associated with flora from infant, calf and piglet (author's transl)].

In order to prove the effect of low doses of antibiotics on the level of drug resistance of the gastrointestinal flora, gnotoxenic mice, harbouring various microflora from newborn calf, piglet or infant, were given continuously water containing 20 microgram/ml chlortetracycline. Control mice, harbouring the same flora, were maintained as well in isolators… CONTINUE READING