Effects of disinfectants and particles on occurrence of different microorganisms in drinking water distribution systems

2021 ◽  
Author(s):  
Lixin Huo ◽  
Linlin Pan ◽  
Ruya Chen ◽  
Baoyou Shi ◽  
Haibo Wang ◽  
...  
Keyword(s):  
Drinking Water ◽  
Distribution Systems ◽  
Water Distribution ◽  
Water Distribution Systems ◽  
Plate Count ◽  
Opportunistic Pathogens ◽  
Heterotrophic Plate Count ◽  
Total Coliforms ◽  
Drinking Water Distribution Systems ◽  
Drinking Water Distribution

Effects of disinfectants and particles on occurrence of different bacteria, including total coliforms, heterotrophic plate count (HPC), different opportunistic pathogens (OPs) and ameba hosts, were investigated in drinking water distribution...

Aftergrowths in Drinking Water Systems: An Australian Perspective

1988 ◽  
Vol 20 (11-12) ◽  
pp. 437-439 ◽  
Author(s):  
K. Power ◽  
B. Cooper ◽  
H. Watts ◽  
L. A. Nagy
Keyword(s):  
Drinking Water ◽  
Distribution Systems ◽  
Water Distribution ◽  
Water Distribution Systems ◽  
Water Systems ◽  
Plate Count ◽  
Total Coliforms ◽  
Drinking Water Distribution Systems ◽  
Drinking Water Distribution ◽  
Sydney Australia

Aftergrowths in drinking water distribution systems were investigated in Sydney Australia. The microbiological monitoring results, collected over a 2 year period were used to provide information on interactions between various parameters. Results indicated that microorganisms and total coliforms were usually absent in waters with total chlorine levels over 0.2 mg/L. Results also indicated inhibition between plate count organisms (at 20 and 35°C), and total coliforms, particularly once plate count levels exceeded 100 CFU/mL.

scholarly journals Identification of Aminoglycoside Resistance Genes From Bacteria Isolated From Selected Municipal Drinking Water Distribution Systems in Southwestern Nigeria

2020 ◽  
Vol 41 (S1) ◽  
pp. s255-s255
Author(s):  
Ayodele T. Adesoji ◽  
Adeniyi A. Ogunjobi
Keyword(s):  
Drinking Water ◽  
Distribution Systems ◽  
Water Distribution ◽  
Water Distribution Systems ◽  
Multidrug Resistant ◽  
Resistant Bacteria ◽  
Multidrug Resistant Bacteria ◽  
Southwestern Nigeria ◽  
Drinking Water Distribution Systems ◽  
Drinking Water Distribution

Background: Multidrug-resistant bacteria can lead to treatment failure, resulting in infectious diseases being transferred through nonpotable water. Aminoglycosides are an important class of antibiotics that are abused in Nigeria. Few studies have investigated aminoglycoside-modifying genes (AMGs) that are likely responsible for resistance in Nigeria bacteria isolates. Therefore, we aimed to characterize AMGs from isolates in drinking water distribution systems (DWDS) in southwestern Nigeria. Methods: Multidrug-resistant bacteria (n = 181) that had been previously characterized by 16S rDNA sequencing and that were positive for resistance to at least 1 aminoglycoside antibiotic were selected from 6 treated and untreated water distribution systems. Strains were PCR genotyped for 3 AMGs: aph(3)c, ant(3)b and aph(6)-1dd. Results: Of 181 MDR bacteria tested, 69 (38.12%) were positive for at least 1 of the AMGs. The most common was ant(3)c (27.6%), followed by aph(3")c (18.23%). Both aph(3)c and ant(3")b were found in 7.73% of tested isolates, ant(3)b was most commonly found in Alcaligenes spp (50%). Furthermore, aph(3")c was most commonly detected in Proteus spp (50%). Other genera positive for AMGs included Acinetobacter, Aeromonas, Bordetella, Brevundimonas, Chromobacterium, Klebsiella, Leucobacter, Morganella, Pantoae, Proteus, Providencia, Psychrobacter, and Serratia. Conclusions: High occurrence of ant(3)c and aph(3)c among these bacteria call for urgent attention among public health workers because these genes can be easily disseminated to consumers if present on mobile genetic elements like plasmids, integrons, and transposons.Funding: NoneDisclosures: None

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