scholarly journals Efficiency of Biocides on the Aquatic Systems Through Bacterial Model

2020 ◽  
Vol 71 (1) ◽  
pp. 57-60
Author(s):  
Alina Roxana Banciu ◽  
Lucian Ionescu ◽  
Daniela Liliana Ionica ◽  
Daniel Mitru ◽  
Mihai Nita-Lazar
Keyword(s):  
Public Health ◽  
Water Treatment ◽  
Membrane Structure ◽  
Fish Farming ◽  
Water Systems ◽  
Active Oxygen ◽  
Aquatic Systems ◽  
Bacterial Membrane ◽  
Bacterial Model ◽  
Selection Of

Various biocide technologies have been used successfully in water treatment applications for many years, but their constantly increased production and excessive usage has considerable environmental and economic impacts. In addition, the aggressive use of biocides in more and more fields such as agriculture, livestock growth, and fish farming increased the risk to public health. This measures can lead to the selection of pathogens insusceptible to the main available antimicrobials. Antimicrobials resistance is even more significant when cells are embedded in a biofilm especially in water systems. A variety of microorganisms can be found in swimming pool waters which may be introduced in a number of ways. The disinfection of bathing water is generally achieved by chlorine of chlorine-based products, but alternative more eco-friendly methods such as active oxygen are used more frequently. In this paper, compared the biocides efficiency of two compounds based on chlorine or active oxygen. Although it was assumed that the two biocides have the same mechanism of action and efficiency, we showed in this study that biocides efficiency depends on the bacterial membrane structure and the active oxygen had an increased efficacy against microorganisms compared to chlorine.

scholarly journals Antimicrobials and resistant bacteria in global fish farming and the possible risk for public health

2020 ◽  
Vol 87 ◽  
Author(s):  
Luís Eduardo de Souza Gazal ◽  
Kelly Cristina Tagliari de Brito ◽  
Renata Katsuko Takayama Kobayashi ◽  
Gerson Nakazato ◽  
Lissandra Souto Cavalli ◽  
...  
Keyword(s):  
Public Health ◽  
Infectious Diseases ◽  
Pathogenic Bacteria ◽  
Bacterial Resistance ◽  
Public Health Problem ◽  
Fish Farming ◽  
Cross Resistance ◽  
Resistant Bacteria ◽  
The Impact ◽  
Selection Of

ABSTRACT: The use of antimicrobials in fish farming is a reflection of the fast aquaculture development worldwide. The intensification of aquaculture to achieve market demands could lead to an increase in infectious diseases by pathogenic bacteria. Consequently, antimicrobials act as controls for emerging infectious diseases, but their use must follow the rules and regulations of the country where the activity is performed. Although the regulations impose limits to the use of antimicrobials in fish farming, many studies show that resistant bacteria are isolated from this system. The selection of resistant bacteria is not limited only to the use of antimicrobials, but also to co-selection of resistance genes or even with cross-resistance processes. Resistant bacteria from fish farming are a serious concern because they can be acquired by humans with handling or food chain, which may represent a public health problem. In the present review, we present an overview of antimicrobials use in aquaculture, the antimicrobial resistance and the impact of antimicrobial and bacterial resistance from a public health perspective.

Public health implications of waste water reuse for fish production

1995 ◽  
Vol 32 (11) ◽  
pp. 145-152 ◽  
Author(s):  
M. El-S. Easa ◽  
M. M. Shereif ◽  
A. I. Shaaban ◽  
K. H. Mancy
Keyword(s):  
Public Health ◽  
Waste Water ◽  
Water Reuse ◽  
Monitoring Program ◽  
Health And Safety ◽  
Fish Farming ◽  
Human Consumption ◽  
Fresh Water Fish ◽  
Adverse Health Effects ◽  
Treated Effluent

Public health and safety concerns have traditionally been the main reasons for resisting waste water reuse for fish farming. Potential adverse health effects in such applications could be avoided if the waste is sufficiently treated before reuse. In a full scale demonstration study in Suez, Egypt, about 400 m3/d of raw sewage were treated using a multi-compartment stabilization pond system, for a total residence time from 21-26 days. The treated effluent conformed to WHO guidelines and was used for rearing two types of local fish (tilapia and gray mullet). The produced fish were subjected to an extensive monitoring program. Bacteriological examination revealed that in all samples the fish muscles were free of bacterial contaminants. Nevertheless, low levels of Escherichia coli andAeromonas hydrophila, were isolated from the surface of the fish. Salmonellae, shigellae and staphylococcus aureus were absent from the surface of all the fish sampled. In addition, toxic metals (Pb, Cu, Zn, and Cd) were found to be at much lower levels than the international advisory limits for human consumption. It is concluded that fish reared in the treated effluent at Suez Experimental Station is (a) suitable for marketing for human consumption, and (b) it's quality is equal or better than fresh water fish in Egypt.

scholarly journals Advancing research in transportation and public health: A selection of twenty project ideas from a U.S. research roadmap

2021 ◽  
Vol 21 ◽  
pp. 101021
Author(s):  
Andrew L. Dannenberg ◽  
Daniel A. Rodriguez ◽  
Laura S. Sandt
Keyword(s):  
Public Health ◽  
Selection Of

scholarly journals Microbial composition of purified waters and implications for regrowth control in municipal water systems

2015 ◽  
Vol 1 (6) ◽  
pp. 882-892 ◽  
Author(s):  
Caitlin R. Proctor ◽  
Marc A. Edwards ◽  
Amy Pruden
Keyword(s):  
Water Treatment ◽  
Water Systems ◽  
Microbial Composition ◽  
Municipal Water ◽  
Microbial Regrowth

The limits of water treatment to control microbial regrowth were examined using highly purified waters.

The selection of graduate students in public health education.

1956 ◽  
Vol 40 (3) ◽  
pp. 159-163 ◽  
Author(s):  
Richard P. Barthol ◽  
Barbara A. Kirk
Keyword(s):  
Public Health ◽  
Graduate Students ◽  
Health Education ◽  
Public Health Education ◽  
Selection Of

scholarly journals Asparagine accumulation in chicory storage roots is controlled by translocation and feedback regulation of asparagine biosynthesis in leaves

2020 ◽  
Author(s):  
Emanoella Soares ◽  
Leonard Shumbe ◽  
Nicholas Dauchot ◽  
Christine Notté ◽  
Claire Prouin ◽  
...  
Keyword(s):  
Public Health ◽  
High Temperature ◽  
Feedback Loop ◽  
Reducing Sugars ◽  
Feedback Regulation ◽  
Negative Feedback Loop ◽  
List Type ◽  
Storage Roots ◽  
Crop Species ◽  
Selection Of

SummaryThe presence of acrylamide (AA), a potentially carcinogenic and neurotoxic compound, in food has become a major concern for public health. AA in plant-derived food mainly arises from the reaction of the amino acid asparagine (Asn) and reducing sugars during processing of foodstuffs at high temperature.Using a selection of genotypes from the chicory germplasm we performed Asn measurements in storage roots and leaves to identify genotypes contrasting for Asn accumulation. We combined molecular analysis and grafting experiments to show that leaf to root translocation controls asparagine biosynthesis and accumulation in chicory storage roots.We could demonstrate that Asn accumulation in storage roots depends on Asn biosynthesis and transport from the leaf, and that a negative feedback loop by Asn on CiASN1 expression impacts Asn biosynthesis in leaves.Our results provide a new model for asparagine biosynthesis in root crop species and highlight the importance of characterizing and manipulating asparagine transport to reduce AA content in processed plant-based foodstuffs.

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