two possible modes of the microorganisms to overcome the mutual repellent forces between the invading organism and the urethral surface cover cell are suggested -- reduction of surface charge in microorganisms with high isoelectric point ( s. saprophyticus ) ( utilizing ph-shift towards increased acidity ) , and attachment by means of poorly or non-charged bacterial appendices ( i.e . fimbriae ) ( e. coli ) .
C0029235
organism
C0445623
microorganisms