Objective To discuss the hospital acquired infection(HAI) and the condition of bacteria resistance of acute severe organophosphorus(ASOP) patients with mechanical ventilation support in ICU.Methods To take bacteria-growing bests and medicine-sensitivity tests on the 56 patients with HAI secondary to ASOP support of mechanical ventilation in ICU in the past 4 years.Results In the 56 patients,respiratory infection was the commonest(45%).In all,the HAI was composed of negative gram fungi,primarily(75%).In the ...