Contamination of SARS-CoV-2 in Isolation wards and Discussion on Prevention and Control Measures/ 隔离病房新型冠状病毒污染情况及防控措施探讨

Objective To understand contamination of SARS-CoV-2 in isolation wards, and provide evidence for precise monitoring on healthcare-associated infection( HAI) Methods Object surface specimens were taken from clean area, potentially contaminated area and contaminated area in the SARS-CoV-2 isolation wards in The First Hospital of Changsha before disinfection, referring to pharyngeal swab test method, specimens were performedSARS-CoV-2 nucleic acid test, test results were analyzed statistically Results A total of 191 specimens of various object surface in isolation wards were collected, 9 of which were positive for SARS-CoV-2 test, positive rate was4 71% Positive specimens were all from contaminated areas of SARS-CoV-2 isolation wards, ventilator panel, probe and outer surface of B-ultrasound machine, foot pedal of medical waste bin, patient' s quilt cover, bedside lamp switch, hands of health care workers (HCWs), bedside table, toilet door handle, patient's mobile phone were detected one positive specimen respectively Specimens of object surface of potentially contaminated area and clean area was not found SARS-CoV-2 In contaminated areas, positive rate of SARS-CoV-2 nucleic acid test of surrounding of patients with cough was higher than that of patients without cough (10 81% vs 1 43%，P0 05) Conclusion Contaminated area in isolation wards is contaminated seriously by SA RS-CoV-2, especially surrounding of patients with cough Strictdis infection and isolation measures should be taken to effectively reduce the HAI risk of COVID-19