一、感染因素(infectionfactor)
细菌黏附于尿路黏膜(Bacterialadhesin)
输尿管蠕动减弱(squirmofurethral)
二、宿主防御机制(resistpowerofhost)
PH
Osmosis
Highconcentrationofurea
organicacid
immunoreaction(IgA,IgG)
诱发因素
Reduceofimmunepowerwithhuman
Obstructionofurinarytract
Hospital-acquiredinfectionfactor