What are the key microbial differences between tap water and bottled mineral water?

The study revealed significant differences: tap water generally showed a dominance of Alphaproteobacteria, particularly the genus *Blastomonas*. In contrast, bottled mineral water often featured Gammaproteobacteria, with *Acidovorax* being dominant in several brands. Mineral water's bacterial communities were highly diverse and unique to each brand, even varying by bottling season.

How do modern techniques like next-generation sequencing enhance our understanding of water microbiota?

Next-generation sequencing, specifically Illumina 16S rRNA sequencing, allows for the identification of total bacteria, including the vast majority that are non-culturable. This provides a much more comprehensive view of the complex microbial environment compared to traditional culture-based methods, which only detect a fraction of the existing microorganisms. AMPAC USA leverages such advanced understanding to design effective purification solutions.

What types of bacteria are commonly found in tap water according to the study?

The research indicated that tap water samples predominantly contained Alphaproteobacteria, with *Blastomonas* being a frequently observed genus. While many waterborne bacteria are harmless, AMPAC USA's industrial reverse osmosis systems are engineered to effectively remove a wide spectrum of microorganisms, ensuring high-purity water for critical applications like military bases and food & beverage plants.

Does the brand or bottling season impact the bacterial composition of mineral water?

Yes, the study found that each brand of mineral water possessed a highly diverse and characteristic bacterial community. Furthermore, the season in which the water was bottled significantly influenced the species distribution, with certain bacteria identified exclusively during specific seasons. This highlights the dynamic nature of microbial ecosystems even in bottled products.

Why is it important to use both culture-based and genetic methods to analyze water bacteria?

Combining methods like heterotrophic plate counts (MALDI-TOF MS) and Illumina 16S rRNA sequencing offers a complementary and more complete understanding of water microbiota. Culture-based methods identify culturable bacteria for routine analysis, while genetic sequencing reveals the full scope of microbial diversity, including non-culturable organisms. This dual approach is crucial for comprehensive water quality assessment and informs advanced purification strategies.

Unravelling The Composition Of Tap And Mineral Water Microbiota

Laura Sala-Comorera¹, Laia Caudet-Segarra², Belén Galofré³, Francisco Lucena¹, Anicet R Blanch¹, Cristina García-Aljaro⁴

PMID: 32919261

\n \t

DOI: 10.1016/j.ijfoodmicro.2020.108850

Abstract

\n\nThere’s a whole world of microbes in our drinking water, mostly bacteria in various states. But we don’t really know that much about it. Our goal for this work was to really get to know the bacterial communities in tap water and bottled mineral water, since those are the main ways people get their drinking water these days. We looked at 11 tap water samples from different places and distribution systems, plus 10 brands of bottled natural mineral water. We used two methods: a) heterotrophic plate counts with MALDI-TOF MS for the culturable bacteria, and b) Illumina amplicon sequencing for all bacteria, including those we can’t grow in a lab. For the culturable bacteria, we isolated them on WPCA (ISO) agar at 22 ± 2 °C for 72 hours. We identified 2046 isolates using MALDI-TOF MS. We compared them to the Bruker Daltonics Library and our own custom “Drinking Water Library.” For the total bacteria, we pulled DNA from 6 liters of water and sent it for Illumina 16S rRNA sequencing of the v4 region. We saw big differences between mineral and tap water. Tap water mostly had Alphaproteobacteria, especially the genus Blastomonas, while mineral water had more Gammaproteobacteria. Acidovorax was the main genus in 3 of 7 mineral water brands. The bacterial communities in different mineral water brands were super diverse, each with its own unique fingerprint. Even the season when the water was bottled changed which species showed up, with some only appearing in one season. Among the culturable bacteria, Proteobacteria was the most common phylum, making up about 85% of the isolates. After that came Actinobacteria, Firmicutes, and Bacteroidetes. Proteobacteria also dominated in the Illumina sequencing, accounting for over 99% of the reads. These two methods gave us different results at various taxonomic levels, showing they can really help each other out when we study microbes in mineral water. MALDI-TOF MS looks like a great way to quickly identify heterotrophic bacteria for routine checks in the bottling industry. This study shows that using both MALDI-TOF MS and NGS helps us get a full picture of bacterial diversity in water people drink. Both methods are good for regular use in the water industry to keep water quality high.\n\n

\nKeywords: 16S rRNA sequencing; Drinking water; MALDI-TOF mass spectrometry; Microbiota; Mineral water; Tap water.\n\nhttps://pubmed.ncbi.nlm.nih.gov/32919261/\n\n

\nThe post Unravelling the composition of tap and mineral water microbiota: Divergences between next-generation sequencing techniques and culture-based methods appeared first on Facts About Water.\n\nSource: Water Feed\n

Unravelling the composition of tap and mineral water microbiota: Divergences between next-generation sequencing techniques and culture-based methods

Unravelling the composition of tap and mineral water microbiota: Divergences between next-generation sequencing techniques and culture-based methods

Abstract

About AMPAC USA

Categories

Recent Posts

Tags

Get in Touch

Subscribe to Newsletter

Follow Us

Know More About

Information Links