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Relevant bibliographies by topics / Environmental aeromonads

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Journal articles

Academic literature on the topic 'Environmental aeromonads'

Author: Grafiati

Published: 18 May 2024

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Journal articles on the topic "Environmental aeromonads"

1

Huddleston, Jennifer R., John C. Zak, and Randall M. Jeter. "Sampling bias created by ampicillin in isolation media forAeromonas." Canadian Journal of Microbiology 53, no. 1 (2007): 39–44. http://dx.doi.org/10.1139/w06-103.

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Members of the bacterial genus Aeromonas are widely isolated from aquatic environments and studied in part for their ability to act as opportunistic pathogens in a variety of animals. All aeromonads, with the exception of Aeromonas trota, are generally thought to be resistant to ampicillin, so the antibiotic is frequently added to isolation medium as a selective agent. In this study, 282 aeromonads from environmental sources were isolated on a medium without ampicillin and their resistance to ampicillin determined. Of the 104 of these isolates that were judged to be independent (nonredundant),

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2

Ashbolt, N. J., A. Ball, M. Dorsch, et al. "The identification and human health significance of environmental aeromonads." Water Science and Technology 31, no. 5-6 (1995): 263–69. http://dx.doi.org/10.2166/wst.1995.0621.

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Aeromonads readily grow in waters, particularly if nutrified, to concentrations in excess of total coliforms. Strains of aeromonads can cause gastroenteritis and tissue necrosis. Several suspected virulence factors, such as haemolysins, cytotoxins and enterotoxins may be involved in their pathogenesis. Amongst the thirteen recognised hybridisation groups of Aeromonas, only five species were identified by eight phenotypic characteristics from 339 strains isolated from marine, fresh river or storm waters or from tertiary and sewage/primary effluents. The majority of strains (50%) showed atypical

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3

Bomo, A. M., M. V. Storey, and N. J. Ashbolt. "Detection, integration and persistence of aeromonads in water distribution pipe biofilms." Journal of Water and Health 2, no. 2 (2004): 83–96. http://dx.doi.org/10.2166/wh.2004.0008.

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The occurrence of Aeromonas spp. within biofilms formed on stainless steel (SS), unplasticized polyvinyl chloride (uPVC) and glass (GL) substrata was investigated in modified Robbins Devices (MRD) in potable (MRD-p) and recycled (MRD-r) water systems, a Biofilm Reactor™ (BR) and a laboratory-scale pipe loop (PL) receiving simulated recycled wastewater. No aeromonads were isolated from the MRD-p whereas 3–10% of SS and uPVC coupons (mean 3.85 CFU cm−2 and 12.8 CFU cm−2, respectively) were aeromonad-positive in the MRD-r. Aeromonads were isolated from six SS coupons (67%) (mean 63.4 CFU cm−2) an

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4

Egorov, Andrey I., Jennifer M. Birkenhauer Best, Christopher P. Frebis, and Michella S. Karapondo. "Occurrence of Aeromonas spp. in a random sample of drinking water distribution systems in the USA." Journal of Water and Health 9, no. 4 (2011): 785–98. http://dx.doi.org/10.2166/wh.2011.169.

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Aeromonads are aquatic bacteria found in drinking water supplies worldwide. Some species, such as Aeromonas hydrophila, can cause disease in humans. For this survey, 293 United States public water systems were selected using random sampling, stratified by water source and system type. Water samples were collected during one year from three sites (six samples per site) in each system. Temperature, pH, turbidity, total and free chlorine were measured using standard methods. Aeromonads were detected in 130 of 5,042 valid samples (2.6%) from 42 (14.3%) systems using the ampicillin-dextrin agar wit

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5

Khan, Izhar U. H., Alyssa Loughborough, and Thomas A. Edge. "DNA-based real-time detection and quantification of aeromonads from fresh water beaches on Lake Ontario." Journal of Water and Health 7, no. 2 (2009): 312–23. http://dx.doi.org/10.2166/wh.2009.041.

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The present study was designed to develop a novel, rapid, direct DNA-based protocol to enumerate aeromonads in recreational waters. An Aeromonas genus-specific real-time quantitative polymerase chain reaction (Q-PCR) protocol was developed and optimized using newly designed genus-specific oligonucleotide primers derived from the gyrase B subunit (GyrB) gene. A standard curve was developed based on the PCR protocol with a minimum quantification limit of 10 cell equivalents ml−1 achieved using an autoclaved water sample from recreational water spiked with known quantities of an Aeromonas ATCC st

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6

Albert, M. John, M. Ansaruzzaman, Kaisar A. Talukder, et al. "Prevalence of Enterotoxin Genes in Aeromonas spp. Isolated From Children with Diarrhea, Healthy Controls, and the Environment." Journal of Clinical Microbiology 38, no. 10 (2000): 3785–90. http://dx.doi.org/10.1128/jcm.38.10.3785-3790.2000.

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Aeromonads are causative agents of a number of human infections. Even though aeromonads have been isolated from patients suffering from diarrhea, their etiological role in gastroenteritis is unclear. In spite of a number of virulence factors produced byAeromonas species, their association with diarrhea has not been clearly linked. Recently, we have characterized a heat-labile cytotonic enterotoxin (Alt), a heat-stable cytotonic enterotoxin (Ast), and a cytotoxic enterotoxin (Act) from a diarrheal isolate ofAeromonas hydrophila. Alt and Ast are novel enterotoxins which are not related to choler

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7

Tokajian, Sima, and Fuad Hashwa. "Phenotypic and genotypic identification of Aeromonas spp. isolated from a chlorinated intermittent water distribution system in Lebanon." Journal of Water and Health 2, no. 2 (2004): 115–22. http://dx.doi.org/10.2166/wh.2004.0011.

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Aeromonas spp. were detected in samples collected from both untreated groundwater and treated drinking water in Lebanon. Aeromonas spp. levels ranged between 2 and 1,100 colonies per 100 ml in the intake underground well and between 3 and 43 colonies per 100 ml in samples from the distribution system. Samples positive for Aeromonas spp. from the network had a free chlorine level ranging between 0 and 0.4 mg l −1. Multiple antibiotic-resistance was common among the isolated aeromonads; all were resistant to amoxycillin while 92% showed resistance to cephalexin. Haemolysis on blood agar was dete

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8

Lamy, Brigitte, Fréderic Laurent, and Angeli Kodjo. "Validation of a partialrpoBgene sequence as a tool for phylogenetic identification of aeromonads isolated from environmental sources." Canadian Journal of Microbiology 56, no. 3 (2010): 217–28. http://dx.doi.org/10.1139/w10-006.

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A collection of 50 aeromonads isolated from environmental sources were studied, together with all known Aeromonas nomenspecies, by phenotypic, amplified 16S rDNA restriction analysis (16S rDNA RFLP) and by partial sequence alignment of both 16S rDNA and rpoB genes. Although most of the type strain showed a unique phenotypic pattern, a database constructed on type strain phenotype allowed the identification of only 24% of the isolates. Analysis of 16S rDNA RFLP and the rpoB sequence were almost concordant in identifying environmental isolates at the species level, except for strains belonging t

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9

Ashbolt, N. J., G. S. Grohmann, and C. S. W. Kueh. "Significance of Specific Bacterial Pathogens in the Assessment of Polluted Receiving Waters of Sydney, Australia." Water Science and Technology 27, no. 3-4 (1993): 449–52. http://dx.doi.org/10.2166/wst.1993.0390.

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The impact of primary sewage released from Sydney's ocean outfalls and chlorinated tertiary treated sewage effluent discharged into Sydney's main river system (Hawkesbury-Nepean) have been studied for faecal microorganisms over two years. Faecal indicator bacteria and a range of potential bacterial pathogens (Aeromonas spp., Campylobacters, Pseudomonas aeruginosa, Staphylococcus aureus and salmonellae) were also cultured. Diverting primary-treated sewage from cliff edge release to deepwater (80m) ocean release some 3 km offshore resulted in significant reductions in all bacterial groups examin

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10

Imziln, Boujamaa. "Occurrence and Antibiotic Resistance of Mesophilic Aeromonas in Three Riverine Freshwaters of Marrakech, Morocco." Scientific World JOURNAL 1 (2001): 796–807. http://dx.doi.org/10.1100/tsw.2001.284.

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I n order to evaluate the impact of pollution and sewage on the occurrence and antibiotic resistance of mesophilic aeromonads in riverine freshwaters of Marrakech, samples were collected from three rivers (Oukaimeden, Ourika, and Tensift) upstream and downstream from the principal bordering villages. During a 2-year study, indicators of pollution increased dramatically in the downstream waters. Bacterial indicators (faecal coliforms and faecal streptococci) correlated with mesophilic aeromonads only in heavily polluted waters. In low and moderately polluted sources, densities of mesophilic aer

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