Tamar Kohn

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Publications associées (102)

Observed Kinetics of Enterovirus Inactivation by Free Chlorine Are Host Cell-Dependent

Tamar Kohn, Shannon Christa David, Shotaro Torii, Odile Marie Clotilde Hervás de Nalda-Larivé, Federica Cariti

Virucidal efficacies of disinfectants are typically assessed by infectivity assay utilizing a single type of host cell. Enteroviruses infect multiple host cells via various entry routes, and each entry route may be impaired differently by a given disinfect ...

2023

Selective elimination of enterovirus genotypes by activated sludge and chlorination

Tamar Kohn, Shotaro Torii

Enteroviruses, which are commonly circulating viruses shed in the stool, are released into the sewage system and only partially removed or inactivated, resulting in the discharge of infectious enteroviruses into the environment. Activated sludge and chlori ...

2023

Genotype-Dependent Kinetics of Enterovirus Inactivation by Free Chlorine and Ultraviolet (UV) Irradiation

Tamar Kohn, Shotaro Torii

Inactivation kinetics of enterovirus by disinfection is often studied using a single laboratory strain of a given genotype. Environmental variants of enterovirus are genetically distinct from the corresponding laboratory strain, yet it is poorly understood ...

2022

Expiratory aerosol pH is determined by indoor room trace gases and particle size

Athanasios Nenes, Tamar Kohn, Ghislain Gilles Jean-Michel Motos, Kalliopi Violaki, Walter Hugentobler, Aline Laetitia Schaub, Shannon Christa David

2022

Wastewater Reveals the Spatiotemporal Spread of SARS-CoV-2 in the Canton of Ticino (Switzerland) during the Onset of the COVID-19 Pandemic

Tamar Kohn

Wastewater-based epidemiology (WBE) has emerged as an effective tool for monitoring SARS-CoV-2 dynamics during the COVID-19 pandemic. Here, we add a spatial component to WBE and use it to investigate SARS-CoV-2 spread in the canton of Ticino during the ons ...

2022

Removal of waterborne viruses by Tetrahymena pyriformis is virus-specific and coincides with changes in protist swimming speed

Tamar Kohn

Biological treatment of waterborne viruses, specifically grazing of viruses by protists, can enhance microbial water quality while avoiding the production of toxic byproducts and high energy costs. However, tangible applications are limited by the lack of ...

2022

Fate of parasites and viruses in calcium hydroxide-treated urine in relation to temperature and moisture content

Tamar Kohn, Loïc Decrey

Human urine can be used as fertilizer and technologies, such as alkaline-urine treatment, are being developed to enable easier re-use. There is, however, a risk of pathogens being present in the urine. This hygiene assessment examined inactivation of three ...

2022

Integrating Environmental Dimensions of “One Health” to Combat Antimicrobial Resistance: Essential Research Needs

Tamar Kohn, Xiangdong Li, Ling Jin

2022

Inferring Transmission Fitness Advantage of SARS-CoV-2 Variants of Concern in Wastewater Using Digital PCR

Tamar Kohn, Xavier Fernandez Cassi, Timothy R. Julian

Throughout the global COVID-19 pandemic, SARS-CoV-2 genetic variants of concern (VOCs) have repeatedly and independently arisen. VOCs are characterized by increased transmissibility, increased virulence, or reduced neutralization by antibodies obtained fro ...

2022

Early detection and surveillance of SARS-CoV-2 genomic variants in wastewater using COJAC

Tamar Kohn, Xavier Fernandez Cassi, Federica Cariti, Alex Tunas Corzon, Timothy R. Julian, Carola Bänziger

The continuing emergence of SARS-CoV-2 variants of concern and variants of interest emphasizes the need for early detection and epidemiological surveillance of novel variants. We used genomic sequencing of 122 wastewater samples from three locations in Swi ...

2022

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Wastewater Reveals the Spatiotemporal Spread of SARS-CoV-2 in the Canton of Ticino (Switzerland) during the Onset of the COVID-19 Pandemic

Tamar Kohn

2022

Removal of waterborne viruses by Tetrahymena pyriformis is virus-specific and coincides with changes in protist swimming speed

Tamar Kohn

2022