Eficacia de la mascarilla quirúrgica convencional vs la máscara P95 para la prevención de la influenza identificada mediante PCR-RT

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Clinical Infectious Diseases 2009;49:275–277
© 2009 by the Infectious Diseases Society of America. All rights reserved.
1058-4838/2009/ 4902-0018$ 15.00
DOI: 10.1086/600041
BRIEF REPORT
A Quantitative Assessment of the Efficacy of Surgical and N95 Masks to Filter Influenza Virus in Patients with Acute Influenza Infection
D. F. Johnson,1

J. D. Druce,2

C. Birch,2 and

M. L. Grayson1,3,4

1Infectious Diseases Department, Austin Health, Heidelberg, Victoria, 2Victorian Infectious Diseases Reference Laboratory, North Melbourne, 3Department of Epidemiology and Preventative Medicine, Monash University, Melbourne, and 4Department of Medicine, University of Melbourne, Melbourne, Australia

We assessed the in vivo efficacy of surgical and N95 (respirator) masks to filter reverse transcription‐polymerase chain reaction (RT‐PCR)–detectable virus when worn correctly by patients with laboratory‐confirmed acute influenza. Of 26 patients with a clinical diagnosis of influenza, 19 had the diagnosis confirmed by RT‐PCR, and 9 went on to complete the study. Surgical and N95 masks were equally effective in preventing the spread of PCR‐detectable influenza.

Received 17 December 2008; accepted 1 March 2009; electronically published 12 June 2009.

Reprints or correspondence: Professor M. Lindsay Grayson, Infectious Diseases Dept., Austin Hospital, Austin Health, Studley Rd., Heidelberg, VIC, Australia 3084 (Lindsay.Grayson@ austin.org. au).
Presented in part: 48th Interscience Conference on Antimicrobial Agents and Chemotherapy/ 46th Infectious Diseases Society of America Annual Meeting, Washington, DC, 25–28 October 2008 (abstract K‐4206).