Graphene Characterization and Its Use to Reduce Trihalomethanes (THMs) in Drinking Water in Puerto Rico

2018 ◽  
pp. 111-131
Author(s):  
Jorge L. Hernández Bourdón
Keyword(s):  
Drinking Water ◽  
Puerto Rico

scholarly journals Cryptosporidium in small water systems in Puerto Rico: a pilot study

2015 ◽  
Vol 13 (3) ◽  
pp. 853-858 ◽  
Author(s):  
Guy Robinson ◽  
Harvey A. Minnigh ◽  
Paul R. Hunter ◽  
Rachel M. Chalmers ◽  
Graciela I. Ramírez Toro
Keyword(s):  
Drinking Water ◽  
Puerto Rico ◽  
Pilot Study ◽  
Immunomagnetic Separation ◽  
Water Systems ◽  
Small Water ◽  
Cryptosporidium Oocysts ◽  
Small Water Systems ◽  
Potential Public Health ◽  
Drinking Water Systems

A pilot study was undertaken to investigate the occurrence of Cryptosporidium in four very small drinking water systems supplying communities in rural Puerto Rico. Water samples (40 L) were collected and oocysts were concentrated by calcium carbonate flocculation, recovered by immunomagnetic separation and detected by immunofluorescence microscopy. Cryptosporidium oocysts were identified in all four systems. This is the first report of evidence of the potential public health risk from this chlorine-resistant pathogen in Puerto Rican small water systems. Further work is warranted to fully assess the health risks that Cryptosporidium and other protozoa pose to populations served by community-managed small drinking water systems.

scholarly journals Spatial-temporal targeted and non-targeted surveys to assess microbiological composition of drinking water in Puerto Rico following Hurricane Maria

2021 ◽  
Vol 13 ◽  
pp. 100123
Author(s):  
Maria Sevillano ◽  
Solize Vosloo ◽  
Irmarie Cotto ◽  
Zihan Dai ◽  
Tao Jiang ◽  
...  
Keyword(s):  
Drinking Water ◽  
Puerto Rico

scholarly journals Spatial-temporal targeted and non-targeted surveys to assess microbiological composition of drinking water in Puerto Rico following Hurricane Maria.

2021 ◽  
Author(s):  
Maria Catalina Sevillano ◽  
Solize Vosloo ◽  
Irmarie Cotto ◽  
Zihan Dai ◽  
Tao Jiang ◽  
...  
Keyword(s):  
Drinking Water ◽  
Puerto Rico ◽  
Legionella Pneumophila ◽  
Tap Water ◽  
Genetic Material ◽  
Microbial Composition ◽  
Biological Quality ◽  
Temporal Sampling ◽  
Sampling Locations

Loss of basic utilities, such as drinking water and electricity distribution, were sustained for months in the aftermath of Hurricane Maria's (HM) landfall in Puerto Rico (PR) in September 2017. The goal of this study was to assess if there was deterioration in biological quality of drinking water due to these disruptions. This study characterized the microbial composition of drinking water following HM across nine drinking water systems (DWSs) in PR and utilized an extended temporal sampling campaign to determine if changes in the drinking water microbiome were indicative of HM associated disturbance followed by recovery. In addition to monitoring water chemistry, the samples were subjected to culture independent targeted and non-targeted microbial analysis including quantitative PCR (qPCR) and genome-resolved metagenomics. The qPCR results showed that residual disinfectant was the major driver of bacterial concentrations in tap water with marked decrease in concentrations from early to late sampling timepoints. While Mycobacterium avium and Pseudomonas aeruginosa were not detected in any sampling locations and timepoints, genetic material from Leptospira and Legionella pneumophila were transiently detected in a few sampling locations. The majority of metagenome assembled genomes (MAGs) recovered from these samples were not associated with pathogens and were consistent with bacterial community members routinely detected in DWSs. Further, whole metagenome-level comparisons between drinking water samples collected in this study with samples from other full-scale DWS indicated no significant deviation from expected community membership of the drinking water microbiome. Overall, our results suggest that disruptions due to HM did not result in significant and sustained deterioration of biological quality of drinking water at our study sites.

scholarly journals Impact of Hurricane Maria on Drinking Water Quality in Puerto Rico

2020 ◽  
Vol 54 (15) ◽  
pp. 9495-9509 ◽  
Author(s):  
Yishan Lin ◽  
Maria Sevillano-Rivera ◽  
Tao Jiang ◽  
Guangyu Li ◽  
Irmarie Cotto ◽  
...  
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Puerto Rico ◽  
Drinking Water Quality

Habitat Association of Klebsiella Species

1985 ◽  
Vol 6 (2) ◽  
pp. 52-58 ◽  
Author(s):  
Susan T. Bagley
Keyword(s):  
Drinking Water ◽  
Gastrointestinal Tract ◽  
Surface Waters ◽  
Industrial Effluents ◽  
Opportunistic Pathogen ◽  
Habitat Associations ◽  
Habitat Association ◽  
Klebsiella Species ◽  
Almost All ◽  
Polluted Waters

AbstractThe genus Klebsiella is seemingly ubiquitous in terms of its habitat associations. Klebsiella is a common opportunistic pathogen for humans and other animals, as well as being resident or transient flora (particularly in the gastrointestinal tract). Other habitats include sewage, drinking water, soils, surface waters, industrial effluents, and vegetation. Until recently, almost all these Klebsiella have been identified as one species, ie, K. pneumoniae. However, phenotypic and genotypic studies have shown that “K. pneumoniae” actually consists of at least four species, all with distinct characteristics and habitats. General habitat associations of Klebsiella species are as follows: K. pneumoniae—humans, animals, sewage, and polluted waters and soils; K. oxytoca—frequent association with most habitats; K. terrigena— unpolluted surface waters and soils, drinking water, and vegetation; K. planticola—sewage, polluted surface waters, soils, and vegetation; and K. ozaenae/K. rhinoscleromatis—infrequently detected (primarily with humans).

Puerto Rico: A Cultural Crossroads

ASHA Leader ◽  
2008 ◽  
Vol 13 (15) ◽  
pp. 38-40
Author(s):  
Albert Villanueva-Reyes
Keyword(s):  
Puerto Rico
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