Tamar Kohn

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Related publications (102)

Kinetics of inactivation of waterborne enteric viruses by ozone

Urs von Gunten, Tamar Kohn, Camille Wolf

Ozone is an effective disinfectant against all types of waterborne pathogens. However, accurate and quantitative kinetic data regarding virus inactivation by ozone is scarce, due to the experimental challenges associated with the high reactivity of ozone t ...

2018

Sunlight-mediated inactivation of health-relevant microorganisms in water: A review of mechanisms and modeling approaches

Tamar Kohn, Yang Liu, Krista Rule Wigginton

Health-relevant microorganisms present in natural surface waters and engineered treatment systems that are exposed to sunlight can be inactivated by a complex set of interacting mechanisms. The net impact of sunlight depends on the solar spectral irradianc ...

2018

Inaktivierung von Viren im Wasser

Tamar Kohn

Durch Wasser übertragene, infektiöse Humanviren sind oft im Rohwasser präsent. Bereits die Ingestion einer kleinen Anzahl solcher Viren kann diverse Krankheiten wie Gastroenteritis und Atemwegserkrankungen oder Hepatitis auslösen. Es ist also wichtig, Vire ...

2018

Transfer of enteric viruses (adenovirus and coxsackievirus) and bacteriophage (MS2) from liquid to human skin

Tamar Kohn, Ana Karina Pitol Garcia, Timothy R. Julian

Indirect exposure to waterborne viruses increases risk of infection, especially amongst children with frequent hand-to-mouth contacts. Here, we quantified the transfer of one bacteriophage (MS2) and two enteric viruses (adenovirus and coxsackievirus) from ...

2018

Experimental adaptation of human echovirus 11 to ultraviolet radiation leads to tolerance to disinfection and resistance to ribavirin

Tamar Kohn, Anna Carratala Ripolles, Virginie Bachmann, Jeffrey David Jensen, Qingxia Zhong, Hyunjin Shim

Ultraviolet light in the UVC range is a commonly used disinfectant to control viruses in clinical settings and water treatment. Here, we employed an experimental evolution approach to investigate the adaptation of human echovirus 11 to disinfection by UVC, ...

2017

Resistance of echovirus 11 to ClO2 is associated with enhanced host receptor use, altered entry routes and high fitness

Tamar Kohn, Anna Carratala Ripolles, Virginie Bachmann, Jeffrey David Jensen, Qingxia Zhong, Hyunjin Shim

Waterborne viruses can exhibit resistance to common water disinfectants, yet the mechanisms that allow them to tolerate disinfection are poorly understood. Here, we generated echovirus 11 (E11) with resistance to chlorine dioxide (ClO2) by experimental evo ...

Amer Chemical Soc2017

Identification of the inactivating factors and mechanisms exerted on MS2 coliphage in concentrated synthetic urine

Tamar Kohn, Loïc Decrey

Volume reduction (condensation) is a key for the practical usage of human urine as a fertilizer because it enables the saving of storage space and the reduction of transportation cost. However, concentrated urine may carry infectious disease risks resultin ...

Elsevier2017

Virus transfer at the skin-liquid interface

Tamar Kohn, Timothy R. Julian

Understanding virus transfer between liquid and skin is necessary to estimate transmission during water-related activities. In the present study, we modeled virus transfer from liquid-to-skin and skin-to-liquid. Specifically, we performed human subject stu ...

Amer Chemical Soc2017

Virus inactivation in stored human urine, sludge and animal manure under typical conditions of storage or mesophilic anaerobic digestion

Tamar Kohn, Loïc Decrey

Viruses represent major disease transmitting agents carried by human excreta and animal manure. Understanding virus inactivation is therefore essential in preventing microbial spread due to inadequate treatment of these materials. Here, we investigated the ...

Royal Soc Chemistry2017

Cross-resistance of UV- or chlorine dioxide-resistant echovirus 11 to other disinfectants

Tamar Kohn, Anna Carratala Ripolles, Virginie Bachmann, Qingxia Zhong, Rachele Ossola

The emergence of waterborne viruses with resistance to disinfection has been demonstrated in the laboratory and in the environment. Yet, the implications of such resistance for virus control remain obscure. In this study we investigate if viruses with resi ...

Frontiers Media SA2017

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