Publications by authors named "Travis Chapin"
Article Synopsis
- Poultry litter, commonly used as a nitrogen-rich fertilizer in the southern U.S., is a potential source of human pathogens like Salmonella enterica.
- In a study of 490 samples from 13 farms, 46.2% of farms had Salmonella-positive results, with an overall positivity rate of 6.7%.
- The study found that Salmonella was less likely to be present in older litter and stacked piles, with the most common serotypes being Kentucky, Kiambu, and Michigan, indicating the need for safe agricultural practices when using poultry litter for crop production.
Article Synopsis
- Fresh produce outbreaks linked to Shiga toxin-producing E. coli (STEC) are a continuing concern in the US, especially when manure-amended soils are used for growing crops.
- Researchers collected bovine manure samples from 12 Florida farms to determine the prevalence of STEC, finding rates of 9% for stx1/stx2 genes and 19% for rfbE genes in 518 samples.
- The study's findings, which include a maximum concentration of STEC at 6,800 MPN g-1, aim to inform better pre-harvest intervals for using untreated animal manure in agriculture to minimize public health risks.
The Syst-OMICS consortium is sequencing 4,500 genomes and building an analysis pipeline for the study of genome evolution, antibiotic resistance and virulence genes. Metadata, including phenotypic as well as genomic data, for isolates of the collection are provided through the Foodborne Syst-OMICS database (SalFoS), at https://salfos.ibis.
View Article and Find Full Text PDFUnlabelled: Recurrent outbreaks of bacterial gastroenteritis linked to the consumption of fresh fruits and vegetables highlight the paucity of understanding of the ecology of Salmonella enterica under crop production and postharvest conditions. These gaps in knowledge are due, at least in part, to the lack of suitable surrogate organisms for studies for which biosafety level 2 is problematic. Therefore, we constructed and validated an avirulent strain of Salmonella enterica serovar Typhimurium.
View Article and Find Full Text PDFListeria species have been isolated from diverse environments, often at considerable prevalence, and are known to persist in food processing facilities. The presence of Listeria spp. has been suggested to be a marker for Listeria monocytogenes contamination.
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