选定的预防屏障在阻止空气传播细菌营养细胞和芽孢中的可行性。

Feasibility of selected prophylactic barriers in arrestance of airborne bacterial vegetative cells and endospores.

机构信息

Department of Civil and Environmental Engineering, University of Cincinnati, OH, USA.

出版信息

Am J Infect Control. 2011 Sep;39(7):581-6. doi: 10.1016/j.ajic.2010.10.032. Epub 2011 May 14.

DOI:10.1016/j.ajic.2010.10.032

PMID:21570738

Abstract

BACKGROUND

Transmission of infection by airborne agents is a risk for health care personnel, patients, and visitors. This risk is heightened in regions without access to environmental controls and personal protective equipment. The ability of 2 prophylactic barriers (ie, semitransparent netting for insect control) to arrest bioaerosols was assessed for potential use within the malarial zones.

METHODS

Barriers (pore sizes of 0.8 mm and 0.25 mm) were challenged with bioaerosols of vegetative cells and endospores of Bacillus anthracis strain Sterne 34F2 using a bioaerosol chamber. Barriers were also challenged with airborne inert polystyrene latex particles of known diameters (0.1, 0.43, 0.6, 1.3, 3.2, and 8.0 μm), and the arrestance provided by barrier with the 0.25 mm pore size was expressed as a function of aerodynamic diameter of challenge aerosols.

RESULTS

Barrier with the 0.8 mm pore size provided no significant arrestance of aerosols, whereas the barrier with the 0.25 mm pore size provided an 8% arrestance of vegetative cells and a 13% arrestance of endospores. No arrestance at or below the 0.6 μm particle size was observed.

CONCLUSION

The level of arrestance provided by these prophylactic barriers does not justify their use as a sole method of preventing transmission.

摘要

背景

空气传播的感染源对医护人员、患者和访客构成风险。在无法获得环境控制和个人防护设备的地区，这种风险会加剧。评估了 2 种预防屏障（即用于昆虫控制的半透明网）在疟疾区潜在使用的能力，以阻止生物气溶胶。

方法

使用生物气溶胶室，用枯草芽孢杆菌菌株 Sterne 34F2 的营养细胞和内生孢子的生物气溶胶对屏障（孔径为 0.8 毫米和 0.25 毫米）进行了挑战。还使用具有已知直径（0.1、0.43、0.6、1.3、3.2 和 8.0 μm）的空气中惰性聚苯乙烯乳胶颗粒对屏障进行了挑战，并将具有 0.25 毫米孔径的屏障提供的截留率表示为挑战气溶胶的空气动力学直径的函数。