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2 edition of Factors affecting the survival of enteric bacteria in saline waters found in the catalog.

Factors affecting the survival of enteric bacteria in saline waters

Suzanne Vicars

Factors affecting the survival of enteric bacteria in saline waters

by Suzanne Vicars

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  • 30 Currently reading

Published .
Written in English


Edition Notes

Statementby Suzanne Vicars.
SeriesTheses (University of Northumbria at Newcastle)
ID Numbers
Open LibraryOL18778013M

Pathogenesis and Virulence Factors: transmission via ingestion of contaminated beverages and food, water, milk, meat and chicken, once ingested, C. jejuni cells reach the mucosa at the last segment of the intestine near its junction with the colon, heat-labile enterotoxin stimulates secretory diarrhea similar to . role in the survival of sea water bacteria, in particular potential pathogen bacteria. Nutrient depravation and light radiation associated with oxidative stress are belived to be most the most hostile stress factors of shallow costal sea waters. This paper is focused on .

a). Most important factors affecting the survival of enteric bacteria in seawater are salinity, nutrient availability, microbial antagonism and antibiotic substances (Carlucci and Pramer , b). Bacteria which can tolerate high salt concentrations, up to approximately 10% of NaCl, are called osmotolerant. Organisms that require high. toring the evolution of enteric bacterial colony counts during an incubation period of several days. Other methods, however, such as indirect activity measurements, are not usually used on enteric bacteria in natural aquatic media. Visible light has been mentioned as an impor- tant factor affecting enteric bacteria survival in.

This study was conducted to determine the effects of certain environmental factors, such as temperature, salinity, and light, on the die-off of Salmonella typhi, Salmonella vein, Shigella flexneri, and Escherichia coli, examples of fecal pathogens and indicator organisms in water. The survival of these organisms was investigated in different Cited by: Mar 06,  · Factors affecting the growth and survival of micro organisms in foods 1. Presented by D. Mona Othman Albureikan Food Microbiology Factors Affecting the Growth and Survival of Micro-organisms in Foods 2. MICROBIAL GROWTH -Microbial growth is an autocatalytic process.


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Factors affecting the survival of enteric bacteria in saline waters by Suzanne Vicars Download PDF EPUB FB2

Factors Affecting the Survival of Bacteria in Sea Water. Department of Agricultural Microbiology, Rutgers, The State University, New Brunswick, New Jersey. 1Paper of the Journal Series, New Jersey Agricultural Experiment Station, Rutgers, The State University, Department of Agricultural Microbiology, New Brunswick, New johnsonout.com by: Factors affecting the survival of enteric bacteria in saline waters.

Author: Vicars, Suzanne. ISNI: Awarding Body: University of Northumbria at Newcastle Current Institution: Northumbria University Date of Award: Availability of Full Text. Factors affecting the survival of enteric bacteria in saline waters.

By S. Vicars. Abstract. SIGLEAvailable from British Library Document Supply Centre-DSC:DX / BLDSC - British Library Document Supply CentreGBUnited KingdoAuthor: S. Vicars. The salinity of surface sea water is approximately per cent (ZoBell, ) and, on.

the basis of concentration, inorganic salts are the most. potentially toxic substances present in the sea. Sea salts may influence the survival of bacteria adversely bya general osmotic effect or byspecific ion johnsonout.com by: Jan 09,  · Abstract.

Enteric bacteria exposed to the marine environment simultaneously encounter a variety of abiotic and biotic challenges. Among the former, light appears to be critical in affecting seawater survival; previous growth history plays a major part in preadaptation of the cells, and stationary phase cells are generally more resistant.

Aug 01,  · The rapid initial phase of decline was not a result of Bdellovibrio spp., bacteriophages, or toxins in the water since Bdellovibrio spp. were not present and passage of the lake water through filters that should not have removed bacteriophages or soluble toxins led to the elimination of the rapid phase of johnsonout.com by: Enteric Bacteria survival in aquatic environment is impacted to a great extent by the ability of bacterial cells to survive in adverse environmental conditions.

We evaluate the impact of the environmental factors, such as a temperature, salinity, pH and turbidity waters of coastal Moroccan area; lagoon Oualidia on survival Escherichia coli. Our findings corroborate previous work suggesting that pH, OM content, soil texture, and rainfall are the principal factors that affect the survival and leaching of microbial pathogens (Demoling et al., ).Cited by: 6.

Chapter 7 In situ survival of indicator bacteria and enteric pathogens in estuarine water Relative survival curves of E. coli, S. paratyphi and V. parahaemolyticus in raw and sterile estuarine water under in situ condition is shown in Fig.

and The indirect effect of water biota on E. coli survival was demonstrated by [12], suggested that the content of dissolved carbon dioxide could be indicator to the numbers of johnsonout.com When exposed to aquatic environments, the bacteria face a number of hostile factors, e.g.

biotic (competition, predation) and abiotic (pH, light, salinity, oxidative stress, temperature, osmotic pressure and nutrients deficiency) and in order to survive induce a number of stress responses 21, Survival of enteric bacteria in the sea is greatly affected both by UV and visible light.

In fact, light is considered to be the single most important contributor to bacterial die-off in the sea, although its effects are restricted to shallow johnsonout.com by: Survival of enteric organisms in sea water. On Certain Factors Influencing the Survival of Bacteria in Water and in Saline Solutions.

J Bacteriol. May Waksman SA, Carey CL. Decomposition of Organic Matter in Sea Water by Bacteria: II. Influence of Addition of Organic Substances upon Bacterial Activities. J Bacteriol. Cited by: Dec 01,  · Survival of enteric bacteria in the sea is greatly affected both by UV and visible light.

In fact, light is considered to be the single most important contributor to bacterial die-off in the sea [ 30–33 ], although its effects are restricted to shallow johnsonout.com by: have been, however, few correlations reported about organic matter levels and bacterial survival, therefore other factors may contribute to the overall survival of bacteria within sediments Predation and grazing may be significant factors affecting the survival of bacteria in.

Knowing the survival rates of water-borne Escherichia coli is important in evaluating microbial contamination and making appropriate management decisions. coli survival rates are dependent on temperature, a dependency that is routinely expressed using an analogue of the Q 10 johnsonout.com by: Oct 09,  · Survival of enteric bacteria and coliphage MS2 in pure human urine.

a high pH and ammonia levels and high temperatures are the critical factors affecting the survival of different enteric organisms (Esrey et al After incubation, the cells were centrifuged (IEC, Dunstable, UK) at g for 15 min and washed twice with sterile saline.

Apr 01,  · This phenomenon seems to be a cause of the rapid disappearance of coliform bacteria in coastal waters. In bottom deposits the coliform bacteria probably survive longer as physiologically variated forms when suitable nutrients were supplied.

Some factors affecting the survival of coliform bacteria in johnsonout.com by: 4. factors present in sea water which decrease the survival of enteric organisms.

Trawinski (13), from his observations of the survival of various enteric pathogens in sea water and in the water from sewage outfalls, found that several members of the typhoid group survived for shorter time periods in the outfall water than in water from the open sea.

Effect of Environmental Conditions on Escherichia coli Survival in Seawater. The capacity to form colonies on a solid medium is the first ability that enteric bacteria lose in seawater Significant differences in survival in water environment were found among strains belonging to Cited by: 1.

differentiation of enteric bacteria oneosin-methylene blue agar. J. Bacteriol., 45, in 25 per cent sea water but survival of the test or-ganism decreased as the concentration of sea water that "the normal saline constituents of sea water are not antagonistic to enteric organisms."Cited by: Several factors influence the survival of enteric microorganisms in the marine environment.

These include salinity, type of microorganism, temperature, sediments, nutrients, antagonistic factors, light, and dissolved oxygen. J.M. Viruses in fresh and saline waters.

Pp. in proceedings of the International Symposium of Viruses and.Dec 01,  · Data reported by Signoretto et al. suggested that attachment and the shift to a VBNC state contribute to the prolonged survival of enterococci in marine waters. Furthermore, the time of survival of enterococci is longer in sediments than in water (see “Sediments” below) and in the presence of aquatic vegetation (14, ).Cited by: