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Nelson M, Barnes KB, Davies CH, Cote CK, Meinig JM, Biryukov SS, Dyer DN, Frick O, Heine H, Pfefferle DA, Horstman-Smith A, Barbaras J, Harding SV. The BALB/c Mouse Model for the Evaluation of Therapies to Treat Infections with Aerosolized Burkholderia pseudomallei. Antibiotics (Basel) 2023; 12:antibiotics12030506. [PMID: 36978372 PMCID: PMC10044689 DOI: 10.3390/antibiotics12030506] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Revised: 02/24/2023] [Accepted: 02/28/2023] [Indexed: 03/06/2023] Open
Abstract
Burkholderia pseudomallei, the causative agent of the disease melioidosis, has been isolated from the environment in 45 countries. The treatment of melioidosis is complex, requiring lengthy antibiotic regimens, which can result in the relapse of the disease following treatment cessation. It is important that novel therapies to treat infections with B. pseudomallei be assessed in appropriate animal models, and discussions regarding the different protocols used between laboratories are critical. A ‘deep dive’ was held in October 2020 focusing on the use of the BALB/c mouse model and the inhalational route of infection to evaluate new antibiotic therapies.
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Affiliation(s)
- Michelle Nelson
- Defence Science and Technology Laboratory, Porton Down, Salisbury SP4 0JQ, UK
| | - Kay B. Barnes
- Defence Science and Technology Laboratory, Porton Down, Salisbury SP4 0JQ, UK
| | - Carwyn H. Davies
- Defence Science and Technology Laboratory, Porton Down, Salisbury SP4 0JQ, UK
| | - Christopher K. Cote
- United States Army Medical Research Institute of Infectious Diseases, Fort Detrick, Frederick, MD 21702, USA
| | - J. Matthew Meinig
- United States Army Medical Research Institute of Infectious Diseases, Fort Detrick, Frederick, MD 21702, USA
| | - Sergei S. Biryukov
- United States Army Medical Research Institute of Infectious Diseases, Fort Detrick, Frederick, MD 21702, USA
| | - David N. Dyer
- United States Army Medical Research Institute of Infectious Diseases, Fort Detrick, Frederick, MD 21702, USA
| | - Ondraya Frick
- United States Army Medical Research Institute of Infectious Diseases, Fort Detrick, Frederick, MD 21702, USA
| | - Henry Heine
- Institute for Therapeutic Innovation, University of Florida, Orlando, FL 32827, USA
| | | | | | - Julie Barbaras
- Defense Threat Reduction Agency, Fort Belvoir, VA 22060, USA
| | - Sarah V. Harding
- Defence Science and Technology Laboratory, Porton Down, Salisbury SP4 0JQ, UK
- School of Respiratory Sciences, University of Leicester, Leicester LE1 7RH, UK
- Correspondence:
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Schuit M, Gardner S, Taylor J, Dabisch P. Evaluation of four sampling devices for Burkholderia pseudomallei laboratory aerosol studies. PLoS Negl Trop Dis 2021; 15:e0009001. [PMID: 33524051 PMCID: PMC7850477 DOI: 10.1371/journal.pntd.0009001] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Accepted: 11/21/2020] [Indexed: 11/18/2022] Open
Abstract
Previous field and laboratory studies investigating airborne Burkholderia pseudomallei have used a variety of different aerosol samplers to detect and quantify concentrations of the bacteria in aerosols. However, the performance of aerosol samplers can vary in their ability to preserve the viability of collected microorganisms, depending on the resistance of the organisms to impaction, desiccation, or other stresses associated with the sampling process. Consequently, sampler selection is critical to maximizing the probability of detecting viable microorganisms in collected air samples in field studies and for accurate determination of aerosol concentrations in laboratory studies. To inform such decisions, the present study assessed the performance of four laboratory aerosol samplers, specifically the all-glass impinger (AGI), gelatin filter, midget impinger, and Mercer cascade impactor, for collecting aerosols containing B. pseudomallei generated from suspensions in two types of culture media. The results suggest that the relative performance of the sampling devices is dependent on the suspension medium utilized for aerosolization. Performance across the four samplers was similar for aerosols generated from suspensions supplemented with 4% glycerol. However, for aerosols generated from suspensions without glycerol, use of the filter sampler or an impactor resulted in significantly lower estimates of the viable aerosol concentration than those obtained with either the AGI or midget impinger. These results demonstrate that sampler selection has the potential to affect estimation of doses in inhalational animal models of melioidosis, as well as the likelihood of detection of viable B. pseudomallei in the environment, and will be useful to inform design of future laboratory and field studies.
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Affiliation(s)
- Michael Schuit
- National Biodefense Analysis and Countermeasures Center, Operated by BNBI for the U.S. Department of Homeland Security Science and Technology Directorate, Frederick, Maryland, United States of America
- School of Systems Biology, George Mason University, Manassas, Virginia, United States of America
- * E-mail:
| | - Sierra Gardner
- National Biodefense Analysis and Countermeasures Center, Operated by BNBI for the U.S. Department of Homeland Security Science and Technology Directorate, Frederick, Maryland, United States of America
| | - Jill Taylor
- National Biodefense Analysis and Countermeasures Center, Operated by BNBI for the U.S. Department of Homeland Security Science and Technology Directorate, Frederick, Maryland, United States of America
| | - Paul Dabisch
- National Biodefense Analysis and Countermeasures Center, Operated by BNBI for the U.S. Department of Homeland Security Science and Technology Directorate, Frederick, Maryland, United States of America
- School of Systems Biology, George Mason University, Manassas, Virginia, United States of America
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