English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

Aerotolerance in the microaerophilic species  Campylobacter  was previously reported and could increase bacterial survival and transmission in foods during stressful processing and storage conditions. In this study, 167  Campylobacter  isolates (76  C. jejuni  and 91  C. coli ) were screened for aerotolerance; these strains were previously isolated from retail chicken meat, chicken livers, chicken gizzards, turkey, pork, and beef liver samples. Bacterial cultures were incubated aerobically in Mueller Hinton broth with agitation and viable cell counts were taken at 0, 6, 12, and 24 h. Approximately 47% of the screened  Campylobacter  isolates were aerotolerant (viable after a 12-h aerobic incubation period), whereas 24% were hyper-aerotolerant (viable after a 24-h aerobic incubation). A greater prevalence of aerotolerant strains (80%) was found among  C. coli  isolates as compared to  C. jejuni  isolates (6%). Differences in the oxidative stress response related genes were detected among  C. jejuni  and  C. coli  isolates when comparative genomics was used to analyze 17 Whole Genome Sequenced (WGS) strains from our laboratory. Genes encoding putative transcriptional regulator proteins and a catalase-like heme binding protein were found in  C. coli  genomes, but were absent in the genomes of  C. jejuni . PCR screening showed the presence of a catalase-like protein gene in 75% (68/91) of  C. coli  strains, which was absent in all tested  C. jejuni  strains. While about 79% (30/38) of the hyper-aerotolerant  C. coli  strains harbored the catalase-like protein gene, the gene was also present in a number of the aerosensitive strains. The Catalase like protein gene was found to be expressed in both aerobic and microaerobic conditions with a 2-fold higher gene expression detected in aerobic conditions for an aerosensitive strain. However, the exact function of the gene remains unclear and awaits further investigation. In conclusion, aerotolerant  Campylobacter  strains (especially  C. coli ) are prevalent in various retail meats. Further studies are needed to investigate whether the genes encoding catalase-like heme binding protein and putative transcriptional regulators in  C. coli  strains are involved in stress response.

Campylobacter coli From Retail Liver and Meat Products Is More Aerotolerant Than Campylobacter jejuni