Publications by authors named "Bethel Demeke"
Article Synopsis
- Salmonella enterica serovar Typhi (S. Typhi) causes Typhoid fever, and while blood cultures are the best way to diagnose it, they're hard to use in resource-limited areas.*
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- Researchers developed a novel process control organism (PCO) as a biosafe surrogate to test various environmental surveillance methods for detecting S. Typhi in water.*
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- The PCO successfully mimicked S. Typhi in lab tests and was consistently detected in wastewater samples from India and Malawi, making it a reliable tool for validating environmental detection methods for this pathogen.*
Am J Trop Med Hyg
March 2023
Article Synopsis
- Salmonella Typhi is the bacteria that causes typhoid fever, and monitoring its presence in wastewater is crucial for public health.
- The study assessed eight different methods for collecting and concentrating Salmonella Typhi from wastewater, using two specific strains of the bacteria to evaluate method performance.
- Results indicated that all tested methods can successfully detect Salmonella Typhi, but each has unique advantages and limitations depending on the concentration of the bacteria present and the specific surveillance objectives.
Sci Total Environ
March 2021
Article Synopsis
- * This study tested various methods for extracting and analyzing SARS-CoV-2 from wastewater in the Greater Seattle Area, identifying that skimmed milk flocculation is the most reliable and feasible method for low-resource settings.
- * While bag-mediated filtration had the highest volume tested, its low recovery rates indicate that choosing the right concentration method is critical for accurate detection of the virus.
