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Detection of Sars-Cov-2 in the air of two hospitals in Hermosillo, Sonora, México, utilizing a low-cost environmental monitoring system

  • López, Jorge Hernández1
  • Romo, Álvaro Santos1
  • Molina, Daniel Coronado1
  • Hernández, Gerardo Álvarez2
  • Cureño, Ángel Benjamín Gutiérrez3
  • Acosta, Magali Avilés4
  • Gaxiola, Carlos Andrés Avilés5
  • Félix, Marcos José Serrato6
  • Galván, Teresa Gollas7
  • 1 Centro de Investigaciones Biológicas del Noroeste S.C, Unidad Hermosillo (CIBNOR), calle hermosa 101, 83106 Hermosillo, Sonora, Mexico
  • 2 Departamento de Medicina y Ciencias de la Salud, Universidad de Sonora, Blvd. Luis Encinas y Rosales S/N, Col. Centro, 83000 Hermosillo, Sonora, Mexico
  • 3 Laboratorio de Manufactura Avanzada, Universidad de Sonora, Blvd. Luis Encinas y Rosales S/N, Col. Centro, 83000 Hermosillo, Sonora, Mexico
  • 4 Laboratorio Estatal de Salud de Sonora, Dr. José Miró Abella, Zona Administrativa Federal, 83249 Hermosillo, Sonora, Mexico
  • 5 Hospital general de zona 14 Instituto Mexicano del Seguro Social, Calle República de Cuba Machi López, Montebello, 83120 Hermosillo, Sonora, Mexico
  • 6 Hospital General del Estado de Sonora “Dr. Ernesto Ramos Bours”, Blvd. Luis Encinas J. S/N, San Benito, 83000 Hermosillo, Sonora, Mexico
  • 7 Centro de Investigación en Alimentación y Desarrollo A.C. Carretera Gustavo Enrique Astiazarán Rosas, N0. 46, 83304 Sonora, Mexico
Published Article
International Journal of Infectious Diseases
The Authors. Published by Elsevier Ltd on behalf of International Society for Infectious Diseases.
Publication Date
Nov 03, 2020
DOI: 10.1016/j.ijid.2020.10.089
PMID: 33157295
PMCID: PMC7607259
PubMed Central


Objective The best way of preventing the dispersion of an infectious disease is decreasing the transmissibility of the pathogen. To achieve such a goal, it is important to have epidemiological surveillance to retrieve data about its routes of transmission and dispersion. This study investigated the possibility of SARS-CoV-2 detection using filtration through 0.22 μm pores. Methods A filtration system with vacuum pump was used for sampling, and molecular analysis was performed by RT-PCR for detecting the COVID-19 virus. Results It was found that SARS-CoV-2 could be detected in particulate matter trapped on 0.22 μm filters 3 h after air sampling, and the only contaminated areas were those near patient zones. Conclusions The results confirm the possibility of finding this virus in floating particulate matter in contaminated zones, with a simple and economic sampling method based on filtration technology through 0.22 μm pores and detection with molecular techniques (RT-PCR). The higher risk zones were those near patients with COVID-19.

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