Evidence map›Paper›PMID 36422316›Full record

ArticleMicroorganisms2022

Bacterial Communities in Various Parts of Air-Conditioning Units in 17 Japanese Houses.

Kensuke Watanabe, U Yanagi, Yoshiki Shiraishi, Kazuhiro Harada, Fumitoshi Ogino, Koichiro Asano

Abstract read
In one paragraph

Article in Microorganisms, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.

0numbers the graph read from it
0cells of the map it votes in
7citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

7 citing papers in PubMed.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors.

Kensuke WatanabeGraduate School of Engineering, Kogakuin University, Tokyo 163 8677, Japan.
U YanagiSchool of Architecture, Kogakuin University, Tokyo 163 8677, Japan.ORCID 0000-0001-8962-8344
Yoshiki ShiraishiDivision of Pulmonary Medicine, Department of Medicine, Tokai University School of Medicine, Isehara 259 1193, Japan.ORCID 0000-0001-5275-6318
Kazuhiro HaradaResearch & Development, Duskin Co., Ltd., Osaka 564 0043, Japan.
Fumitoshi OginoResearch & Development, Duskin Co., Ltd., Osaka 564 0043, Japan.
Koichiro AsanoDivision of Pulmonary Medicine, Department of Medicine, Tokai University School of Medicine, Isehara 259 1193, Japan.ORCID 0000-0002-9044-3061

Funding

Japan Agency for Medical Research and Development 21ek0410055, 22ek0410098Japan Society for the Promotion of Science 17H06216
6 · The paper itself

Abstract

HVAC systems have a significant impact on the indoor environment, and microbial contamination in HVAC systems has a significant effect on the indoor air quality. In this study, to gain a better understanding of the microbial contamination inside ACs, we used NGS to analyze the 16S rRNA gene of bacteria adhering to AC filters, cooling coils, fans, and air outlet surfaces. The five phyla in terms of the highest relative abundance were Proteobacteria, Firmicutes, Actinobacteria, Cyanobacteria, and Bacteroidetes. The surface of an AC filter provides a history of indoor airborne bacterial contamination, and of the 10 bacterial genera we detected with the highest abundance (in the following order: Pseudomonas > Staphylococcus > Paracoccus > Corynebacterium > Acinetobacter > Streptococcus > Methylobacterium > Enhydrobacter > Sphingomonas > Actinotignum) on the filter surface, the top 6 genera were Gram-negative bacteria. Furthermore, the seventh-most abundant genus adhering to the filter surface (Methylobacterium) was the second-most abundant genus on the cooling coil and fan, and the ninth-most abundant genus on the air filter (Sphingomonas) was the third-most abundant genus on the cooling coil. Various factors impact the bacterial flora inside AC units, including the location of the house, AC unit usage, and occupant activity.

Indexed as

16S rRNA geneair conditionerair filterair outletbacteriacooling coilfannext-generation sequencingresidential building

Identifiers

PMID36422316
PMCPMC9697849

What OpenQuestion holds

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.