Fates of acid-resistant and non-acid-resistant Shiga toxin-producing Escherichia coli strains in ruminant digestive contents in the absence and presence of probiotics.

Applied and Environmental Microbiology
Frédérique Chaucheyras-DurandChristine Martin

Abstract

Healthy ruminants are the main reservoir of Shiga toxin-producing Escherichia coli (STEC). During their transit through the ruminant gastrointestinal tract, STEC encounters a number of acidic environments. As all STEC strains are not equally resistant to acidic conditions, the purpose of this study was to investigate whether acid resistance confers an ecological advantage to STEC strains in ruminant digestive contents and whether acid resistance mechanisms are induced in the rumen compartment. We found that acid-resistant STEC survived at higher rates during prolonged incubation in rumen fluid than acid-sensitive STEC and that they resisted the highly acidic conditions of the abomasum fluid, whereas acid-sensitive strains were killed. However, transit through the rumen contents allowed acid-sensitive strains to survive in the abomasum fluid at levels similar to those of acid-resistant STEC. The acid resistance status of the strains had little influence on STEC growth in jejunal and cecal contents. Supplementation with the probiotic Saccharomyces cerevisiae CNCM I-1077 or Lactobacillus acidophilus BT-1386 led to killing of all of the strains tested during prolonged incubation in the rumen contents, but it did not have any influe...Continue Reading

References

Apr 1, 1995·Applied and Environmental Microbiology·M M Benjamin, A R Datta
Jan 1, 1993·Infection and Immunity·J Gorden, P L Small
Jan 1, 1997·Applied and Environmental Microbiology·C A BrownM P Doyle
Mar 1, 1997·The Journal of Infectious Diseases·T E BesserP I Tarr
May 29, 1999·Journal of Bacteriology·M P Castanie-CornetJ W Foster
Jul 2, 1999·Applied and Environmental Microbiology·C J HovdeC W Hunt
Oct 8, 1999·Veterinary Microbiology·M W SandersonD D Hancock
Nov 18, 2000·Journal of Food Protection·S J BuchkoD M Veira
Apr 27, 2002·Applied and Environmental Microbiology·Luke J GraukeCarolyn J Hovde
Nov 12, 2002·Journal of Bacteriology·Don L TuckerTyrrell Conway
Dec 14, 2002·Microbiology·Mark P StevensTimothy S Wallis
Apr 16, 2003·Molecular Microbiology·Nobuhisa Masuda, George M Church
Jan 11, 2005·Applied and Environmental Microbiology·J Christopher LowDavid L Gally
Jun 6, 2006·Applied and Environmental Microbiology·Frédérique Chaucheyras-DurandChristine Martin
Nov 17, 2006·Clinical Infectious Diseases : an Official Publication of the Infectious Diseases Society of America·Kristine E JohnsonCynthia L Sears
May 15, 2007·Applied and Environmental Microbiology·Maira Jessica Medellin-PeñaMansel W Griffiths
Mar 11, 2008·Journal of Microbiological Methods·Christine M CareyStacey Thompson
Nov 20, 2008·FEMS Microbiology Letters·Rolf ReissbrodtPeter H Williams
Dec 18, 2008·Applied and Environmental Microbiology·Maira J Medellin-Peña, Mansel W Griffiths

❮ Previous
Next ❯

Citations

Dec 1, 2011·Microbiology and Molecular Biology Reviews : MMBR·P Frey-KlettA Sarniguet
Jan 1, 2013·Biologie aujourd'hui·Evelyne ForanoChristine Martin
Nov 7, 2012·Environmental Microbiology·Yolande BertinChristine Martin
Jun 10, 2017·Archives of Microbiology·Shih-Chun YangJia-You Fang
Apr 20, 2014·Tropical Animal Health and Production·Swaraj Rajkhowa, Dilip Kumar Sarma
Jan 5, 2021·Foodborne Pathogens and Disease·Siobhán C McCarthyGeraldine Duffy

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.