Dear Colleagues,

Microorganisms can be found in most of the built environment (BE), including our homes, public places, and inside vehicles. These microorganisms may form a unique community in each place and affect human health. Understanding the microorganisms of the indoor environment is a crucial step to take; as an example, the airborne infection may occur in the indoor environment. Recent findings have indicated that specific microorganisms can help to confront asthma-related problems. The roles of microorganisms in the built environments became a more important research topic, and it is necessitated to be disseminated from the public health aspect. It is essential to increase the knowledge of the microorganism in the indoor environment with various disciplines to achieve decent indoor air quality to sustain our health. We welcome you to submit the abstract to microorganisms related to indoor air quality.

This Special Issue will attempt to highlight the following questions as a framework to acquire information associated with health and microbiomes in BE.

• Where are the microorganisms in BE coming from? (i.e., source of the microorganisms in the BE);
• How can lifestyle affect microorganisms in the BE? (i.e., soil and outside material to be transported by shoes, soil material attached with food (e.g., vegetable), airborne transport, aerosol from the tap water system, having companion animals, and more);
• Which criteria affect the microbiome of the BE? (i.e., availability of foliage house plant, companion animals, and carpet, type of building, construction material used, and age of the building);
• What is the variation of diversity level and distribution/numbers of available microorganisms in the BE? (i.e., diversity variation with annual and diurnal cycles and a number of occupants per household, distribution/amount difference among wall, floor, ceiling, under the floor of BE and room type as a kitchen, bathroom, bedroom, and more);
• How is the exchange rate of occupants and the type of BE affecting the criteria mentioned above? (i.e., residential hoses and public places, inside the transportation system such as train, subway, bus, airplane, ship and more and associated movement of the microbiome).

Finally, we believe this Special Issue will provide a platform to highlight new research and significant advances in the understanding of this emerging field in microbiology.

Dr. Fumito Maruyama
Dr. Jun Noda
Dr. Milko A. Jorquera
Prof. Makiko Nakajima
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Diversity is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

• Built environment
• Microorganisms
• Bioaerosol
• Pathogen
• Interaction between microorganisms and/or other environmental materials