Production of the potent odour agent, isopropyl methoxypyrazine, by<i>Lysobacter enzymogenes</i>

Emde, Karen M.E.; Best, Norine; Hrudey, Steve E.

doi:10.1080/09593339209385146

Cited by 3 publications

(1 citation statement)

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“…are common inhabitants of chlorinated water (11), its resistance to chlorination remains unclear. Lysobacter species, a common soil and freshwater bacterium linked to the production of the mustyearthy odor detected in water (8), were the most abundant members found in Xanthomonadaceae and were also detected from a biofilm microbial community a water meter collected from the same distribution system (15). The possibility for Lysobacter spp.…”

Section: Discussionmentioning

confidence: 99%

Microbial Community Dynamics of an Urban Drinking Water Distribution System Subjected to Phases of Chloramination and Chlorination Treatments

Hwang

Ling

Andersen

et al. 2012

Appl Environ Microbiol

135

103

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Water utilities in parts of the U.S. control microbial regrowth in drinking water distribution systems (DWDS) by alternating postdisinfection methods between chlorination and chloramination. To examine how this strategy influences drinking water microbial communities, an urban DWDS (population Х 40,000) with groundwater as the source water was studied for approximately 2 years. Water samples were collected at five locations in the network at different seasons and analyzed for their chemical and physical characteristics and for their microbial community composition and structure by examining the 16S rRNA gene via terminal restriction fragment length polymorphism and DNA pyrosequencing technology. Nonmetric multidimension scaling and canonical correspondence analysis of microbial community profiles could explain >57% of the variation. Clustering of samples based on disinfection types (free chlorine versus combined chlorine) and sampling time was observed to correlate to the shifts in microbial communities. Sampling location and water age (<21.2 h) had no apparent effects on the microbial compositions of samples from most time points. Microbial community analysis revealed that among major core populations, Cyanobacteria, Methylobacteriaceae, Sphingomonadaceae, and Xanthomonadaceae were more abundant in chlorinated water, and Methylophilaceae, Methylococcaceae, and Pseudomonadaceae were more abundant in chloraminated water. No correlation was observed with minor populations that were detected frequently (<0.1% of total pyrosequences), which were likely present in source water and survived through the treatment process. Transient microbial populations including Flavobacteriaceae and Clostridiaceae were also observed. Overall, reversible shifts in microbial communities were especially pronounced with chloramination, suggesting stronger selection of microbial populations from chloramines than chlorine.

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Section: Discussionmentioning

confidence: 99%