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Gilbert JA, Hartmann EM. The indoors microbiome and human health. Nat Rev Microbiol 2024:10.1038/s41579-024-01077-3. [PMID: 39030408 DOI: 10.1038/s41579-024-01077-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/25/2024] [Indexed: 07/21/2024]
Abstract
Indoor environments serve as habitat for humans and are replete with various reservoirs and niches for microorganisms. Microorganisms enter indoor spaces with their human and non-human hosts, as well as via exchange with outdoor sources, such as ventilation and plumbing. Once inside, many microorganisms do not survive, especially on dry, barren surfaces. Even reduced, this microbial biomass has critical implications for the health of human occupants. As urbanization escalates, exploring the intersection of the indoor environment with the human microbiome and health is increasingly vital. The indoor microbiome, a complex ecosystem of microorganisms influenced by human activities and environmental factors, plays a pivotal role in modulating infectious diseases and fostering healthy immune development. Recent advancements in microbiome research shed light on this unique ecological system, highlighting the need for innovative approaches in creating health-promoting living spaces. In this Review, we explore the microbial ecology of built environments - places where humans spend most of their lives - and its implications for immune, endocrine and neurological health. We further propose strategies to harness the indoor microbiome for better health outcomes.
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Affiliation(s)
- Jack A Gilbert
- Department of Paediatrics, University of California San Diego, La Jolla, CA, USA.
- Scripps Institution of Oceanography, University of California San Diego, La Jolla, CA, USA.
- Center for Microbiome Innovation, University of California San Diego, La Jolla, CA, USA.
| | - Erica M Hartmann
- Department of Civil and Environmental Engineering, Northwestern University, Evanston, IL, USA
- Department of Medicine, Division of Pulmonary Medicine, Northwestern University, Chicago, IL, USA
- Center for Synthetic Biology, Northwestern University, Evanston, IL, USA
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CALABRÒ GIOVANNAELISA, CASELLI ELISABETTA, ROGNONI CARLA, LAURENTI PATRIZIA, MOSCATO UMBERTO, DI PIETRO MARIALUISA, GUALANO MARIAROSARIA, CASCINI FIDELIA, D’AMBROSIO FLORIANA, PATTAVINA FABIO, VINCENTI SARA, MAIDA ADA, MANCINI ROSSELLA, MARTINELLI SILVIA, AMANTEA CARLOTTA, CORONA VALERIOFLAVIO, DANIELE ALESSANDRA, PALADINI ANDREA, ROSSI MARIAFRANCESCA, LA GATTA EMANUELE, PETRELLA LUIGI, PULEO VALERIA, TARRICONE ROSANNA, RICCIARDI WALTER. [Health Technology Assessment of the Probiotic Cleaning Hygiene System (PCHS)]. JOURNAL OF PREVENTIVE MEDICINE AND HYGIENE 2022; 63:E1-E123. [PMID: 36819908 PMCID: PMC9910312 DOI: 10.15167/2421-4248/jpmh2022.63.3s1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Affiliation(s)
- GIOVANNA ELISA CALABRÒ
- Sezione di Igiene, Dipartimento Universitario di Scienze della Vita e Sanità Pubblica, Università Cattolica del Sacro Cuore, Roma
- VIHTALI - Value In Health Technology and Academy for Leadership & Innovation Spin-Off dell’Università Cattolica del Sacro Cuore, Roma
| | - ELISABETTA CASELLI
- Sezione di Microbiologia, Dipartimento di Scienze chimiche, farmaceutiche e agrarie, CIAS e LTTA, Università degli Studi di Ferrara
| | | | - PATRIZIA LAURENTI
- Sezione di Igiene, Dipartimento Universitario di Scienze della Vita e Sanità Pubblica, Università Cattolica del Sacro Cuore, Roma
- Fondazione Policlinico Universitario A. Gemelli IRCCS, Roma, Italia
| | - UMBERTO MOSCATO
- Fondazione Policlinico Universitario A. Gemelli IRCCS, Roma, Italia
- Sezione di Medicina del Lavoro, Dipartimento Universitario Scienze della Vita e di Sanità Pubblica, Università Cattolica del Sacro Cuore, Roma
| | - MARIA LUISA DI PIETRO
- Sezione di Igiene, Dipartimento Universitario di Scienze della Vita e Sanità Pubblica, Università Cattolica del Sacro Cuore, Roma
| | - MARIA ROSARIA GUALANO
- Centro di Ricerca e Studi sulla Leadership in Medicina, Università Cattolica del Sacro Cuore, Roma
| | - FIDELIA CASCINI
- Sezione di Igiene, Dipartimento Universitario di Scienze della Vita e Sanità Pubblica, Università Cattolica del Sacro Cuore, Roma
| | - FLORIANA D’AMBROSIO
- Sezione di Igiene, Dipartimento Universitario di Scienze della Vita e Sanità Pubblica, Università Cattolica del Sacro Cuore, Roma
| | - FABIO PATTAVINA
- Fondazione Policlinico Universitario A. Gemelli IRCCS, Roma, Italia
| | - SARA VINCENTI
- Fondazione Policlinico Universitario A. Gemelli IRCCS, Roma, Italia
| | - ADA MAIDA
- Sezione di Igiene, Dipartimento Universitario di Scienze della Vita e Sanità Pubblica, Università Cattolica del Sacro Cuore, Roma
| | - ROSSELLA MANCINI
- Sezione di Igiene, Dipartimento Universitario di Scienze della Vita e Sanità Pubblica, Università Cattolica del Sacro Cuore, Roma
| | - SILVIA MARTINELLI
- Sezione di Igiene, Dipartimento Universitario di Scienze della Vita e Sanità Pubblica, Università Cattolica del Sacro Cuore, Roma
| | - CARLOTTA AMANTEA
- Sezione di Medicina del Lavoro, Dipartimento Universitario Scienze della Vita e di Sanità Pubblica, Università Cattolica del Sacro Cuore, Roma
| | - VALERIO FLAVIO CORONA
- Sezione di Igiene, Dipartimento Universitario di Scienze della Vita e Sanità Pubblica, Università Cattolica del Sacro Cuore, Roma
| | - ALESSANDRA DANIELE
- Sezione di Medicina del Lavoro, Dipartimento Universitario Scienze della Vita e di Sanità Pubblica, Università Cattolica del Sacro Cuore, Roma
| | - ANDREA PALADINI
- Sezione di Igiene, Dipartimento Universitario di Scienze della Vita e Sanità Pubblica, Università Cattolica del Sacro Cuore, Roma
| | - MARIA FRANCESCA ROSSI
- Sezione di Medicina del Lavoro, Dipartimento Universitario Scienze della Vita e di Sanità Pubblica, Università Cattolica del Sacro Cuore, Roma
| | - EMANUELE LA GATTA
- Sezione di Igiene, Dipartimento Universitario di Scienze della Vita e Sanità Pubblica, Università Cattolica del Sacro Cuore, Roma
| | - LUIGI PETRELLA
- Sezione di Igiene, Dipartimento Universitario di Scienze della Vita e Sanità Pubblica, Università Cattolica del Sacro Cuore, Roma
| | - VALERIA PULEO
- Sezione di Igiene, Dipartimento Universitario di Scienze della Vita e Sanità Pubblica, Università Cattolica del Sacro Cuore, Roma
| | - ROSANNA TARRICONE
- CERGAS-SDA Bocconi School of Management, Milano
- Dipartimento di Scienze Sociali e Politiche, Università Bocconi, Milano
| | - WALTER RICCIARDI
- Sezione di Igiene, Dipartimento Universitario di Scienze della Vita e Sanità Pubblica, Università Cattolica del Sacro Cuore, Roma
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Hu J, Shuai W, Sumner JT, Moghadam AA, Hartmann EM. Clinically relevant pathogens on surfaces display differences in survival and transcriptomic response in relation to probiotic and traditional cleaning strategies. NPJ Biofilms Microbiomes 2022; 8:72. [PMID: 36123373 PMCID: PMC9485146 DOI: 10.1038/s41522-022-00335-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Accepted: 09/02/2022] [Indexed: 02/05/2023] Open
Abstract
Indoor surfaces are paradoxically presumed to be both colonized by pathogens, necessitating disinfection, and "microbial wastelands." In these resource-poor, dry environments, competition and decay are thought to be important drivers of microbial community composition. However, the relative contributions of these two processes have not been specifically evaluated. To bridge this knowledge gap, we used microcosms to evaluate whether interspecies interactions occur on surfaces. We combined transcriptomics and traditional microbiology techniques to investigate whether competition occurred between two clinically important pathogens, Acinetobacter baumannii and Klebsiella pneumoniae, and a probiotic cleaner containing a consortium of Bacillus species. Probiotic cleaning seeks to take advantage of ecological principles such as competitive exclusion, thus using benign microorganisms to inhibit viable pathogens, but there is limited evidence that competitive exclusion in fact occurs in environments of interest (i.e., indoor surfaces). Our results indicate that competition in this setting has a negligible impact on community composition but may influence the functions expressed by active organisms. Although Bacillus spp. remained viable on surfaces for an extended period of time after application, viable colony forming units (CFUs) of A. baumannii recovered following exposure to a chemical-based detergent with and without Bacillus spp. showed no statistical difference. Similarly, for K. pneumoniae, there were small statistical differences in CFUs between cleaning scenarios with or without Bacillus spp. in the chemical-based detergent. The transcriptome of A. baumannii with and without Bacillus spp. exposure shared a high degree of similarity in overall gene expression, but the transcriptome of K. pneumoniae differed in overall gene expression, including reduced response in genes related to antimicrobial resistance. Together, these results highlight the need to fully understand the underlying biological and ecological mechanisms for community assembly and function on indoor surfaces, as well as having practical implications for cleaning and disinfection strategies for infection prevention.
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Affiliation(s)
- Jinglin Hu
- Department of Civil and Environmental Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Weitao Shuai
- Department of Civil and Environmental Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Jack T Sumner
- Department of Civil and Environmental Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Anahid A Moghadam
- Department of Civil and Environmental Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Erica M Hartmann
- Department of Civil and Environmental Engineering, Northwestern University, Evanston, IL, 60208, USA.
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La Maestra S, D'Agostini F, Geretto M, Micale RT. Microbial-based cleaning products as a potential risk to human health: A review. Toxicol Lett 2021; 353:60-70. [PMID: 34626814 DOI: 10.1016/j.toxlet.2021.09.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Revised: 09/07/2021] [Accepted: 09/29/2021] [Indexed: 11/25/2022]
Abstract
Microbial-based cleaning products (MBCPs) have been introduced, on the market, as an alternative to traditional chemical cleaning. In addition to traditional detergents, MBCPs can perform their cleaning function, digesting the smallest particles of dirt and mitigating odours generated by environmental bacterium metabolic processes. Nevertheless, several aspects remain to be clarified and assessed, requiring further studies and new regulations to ensure safety. The particular composition of MBCPs makes it difficult to include these products in a specific class, making the European legal context incomplete and unclear. Moreover, MBCPs effects on human health are poorly documented. Exposure risks can be obtained indirectly by studies conducted in both microorganisms exposure and their metabolic products, such as enzymes, especially in workers. A further limiting factor for the accurate human health risk assessment due to MBCPs use is an incomplete indication about the MBCPs compositions. Moreover, additional factors such as host microorganisms, frequency and space of use, subject health condition, and age can determine different illness scenarios. The findings from the broad range of studies we have reviewed in this paper confirm the necessity of integrative investigation and regulation to address the use of MBCPs.
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Affiliation(s)
| | | | - Marta Geretto
- Department of Experimental Medicine, University of Genova, Italy
| | - Rosanna T Micale
- Department of Health Sciences, University of Genoa, Genoa, Italy
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Mills S, Ross RP. Colliding and interacting microbiomes and microbial communities - consequences for human health. Environ Microbiol 2021; 23:7341-7354. [PMID: 34390616 DOI: 10.1111/1462-2920.15722] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2021] [Revised: 08/09/2021] [Accepted: 08/12/2021] [Indexed: 11/26/2022]
Abstract
Living 'things' coexist with microorganisms, known as the microbiota/microbiome that provides essential physiological functions to its host. Despite this reliance, the microbiome is malleable and can be altered by several factors including birth-mode, age, antibiotics, nutrition, and disease. In this minireview, we consider how other microbiomes and microbial communities impact the host microbiome and the host through the concept of microbiome collisions (initial exposures) and interactions. Interactions include changes in host microbiome composition and functionality and/or host responses. Understanding the impact of other microbiomes and microbial communities on the microbiome and host are important considering the decline in human microbiota diversity in the developed world - paralleled by the surge of non-communicable, inflammatory-based diseases. Thus, surrounding ourselves with rich and diverse beneficial microbiomes and microbial communities to collide and interact with should help to diminish the loss in microbial diversity and protect from certain diseases. In the same vein, our microbiomes not only influence our health but potentially the health of those close to us. We also consider strategies for enhanced host microbiome collisions and interactions through the surrounding environment that ensure increased microbiome diversity and functionality contributing to enhanced symbiotic return to the host in terms of health benefit.
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Affiliation(s)
- Susan Mills
- APC Microbiome Ireland, University College Cork, Cork, Ireland
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Antimicrobial and bacteriostatic activity of surfactants against B. subtilis for microbial cleaner formulation. Arch Microbiol 2021; 203:3389-3397. [PMID: 33884457 DOI: 10.1007/s00203-021-02328-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Revised: 04/06/2021] [Accepted: 04/09/2021] [Indexed: 10/21/2022]
Abstract
Cleaning products containing live bacteria that form spores of Bacillus spp. as active substances are becoming increasingly common in probiotic cleaner formulation. The quality of cleaning performance for the production of probiotic cleaners does not only depend on the potential of the bacterial strains used, but also on the chemical components of the formulations. In this study, the surfactants and other additives were investigated as biocidal or bacteriostatic against B. subtilis, and the viability of B. subtilis was examined at different pH ranges for microbial cleaner formulation. As a result, it was discovered that the B. subtilis, which can be used in the microbial cleaner formulation, shows higher growth and viability at the neutral pH, and it passes into the death phase at pH 3. According to antagonistic activity results, the Gram-positive S. aureus and K. pneumoniae were the most sensitive bacteria while B. cereus was the most resistant bacteria. The anionic surfactants such as linear alkylbenzene sulfonic acid and sodium lauryl ether sulfate act as bacteriostatic on Bacillus spp. and do not cause cell death. In the view of these results, the usage of appropriate bacterial cultures and the correct stabilization of the formulations are also critical elements in the development of microbial cleaner formulations.
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Tayabali AF, Ashby D. Introduction: Current trends in research and regulation of microbial-based cleaning products. Food Chem Toxicol 2018; 116:1-2. [PMID: 29621575 DOI: 10.1016/j.fct.2018.03.046] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Accepted: 03/30/2018] [Indexed: 10/17/2022]
Affiliation(s)
- Azam F Tayabali
- Biotechnology Laboratory, Environmental Health Science and Research Bureau, Healthy Environments and Consumer Safety Branch, Health Canada, Ottawa, K1A 0K9, Canada.
| | - Deborah Ashby
- CEPA New Substances Assessment Division, New Substances and Control Bureau, Healthy Environments and Consumer Safety Branch, Health Canada, Ottawa, K1A 0K9, Canada.
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