The ARIMA model approach for the biofilm-forming capacity prediction of Listeria monocytogenes recovered from carcasses
The present study aimed to predict the biofilm-formation ability of L. monocytogenes isolates obtained from cattle carcasses via the ARIMA model at different temperature parameters. The identification of L. monoc... (Source: BMC Veterinary Research)
Source: BMC Veterinary Research - March 27, 2024 Category: Veterinary Research Authors: Adalet Dishan, Mukaddes Barel, Serhat Hizlisoy, Recep Sinan Arslan, Harun Hizlisoy, Dursun Alp Gundog, Serhat Al and Zafer Gonulalan Tags: Research Source Type: research

Stress resistant rpsU variants of Listeria monocytogenes can become underrepresented due to enrichment bias
This study investigated whether these switches in phenotypes could result in a bias in strain detection when standard enrichment-based procedures are applied to a variety of strains. Detailed growth kinetics analysis of L. monocytogenes strains were performed, including the LO28 wild type (WT) and rpsU variants V14 and V15, during two commonly used enrichment-based procedures described in the ISO 11290-1:2017 and the U.S. Food and Drug Administration Bacteriological Analytical Manual (BAM). WT had a higher growth rate than the variants during the enrichment processes. Co-culture growth kinetics predictions for WT and rpsU ...
Source: International Journal of Food Microbiology - March 24, 2024 Category: Food Science Authors: Xuchuan Ma Jingjie Chen Marcel H Zwietering Tjakko Abee Heidy M W Den Besten Source Type: research

Stress resistant rpsU variants of Listeria monocytogenes can become underrepresented due to enrichment bias
This study investigated whether these switches in phenotypes could result in a bias in strain detection when standard enrichment-based procedures are applied to a variety of strains. Detailed growth kinetics analysis of L. monocytogenes strains were performed, including the LO28 wild type (WT) and rpsU variants V14 and V15, during two commonly used enrichment-based procedures described in the ISO 11290-1:2017 and the U.S. Food and Drug Administration Bacteriological Analytical Manual (BAM). WT had a higher growth rate than the variants during the enrichment processes. Co-culture growth kinetics predictions for WT and rpsU ...
Source: International Journal of Food Microbiology - March 24, 2024 Category: Food Science Authors: Xuchuan Ma Jingjie Chen Marcel H Zwietering Tjakko Abee Heidy M W Den Besten Source Type: research

Etiology, Clinical Presentation, and Outcomes of Bacterial Meningitis in Adult Patients: A Retrospective Study in Lithuania (2018-2021)
CONCLUSIONS Clinical characteristics of community-acquired acute bacterial meningitis differ based on etiological factors. Patient age, CSF WBC count, and headache may be significant predictive factors for outcomes of bacterial meningitis.PMID:38520034 | DOI:10.12659/MSM.942904 (Source: Medical Science Monitor)
Source: Medical Science Monitor - March 23, 2024 Category: Research Authors: Greta Rynkevi č Emilijus Žilinskas Dovil ė Streckytė Daiva Radzi šauskienė R ūta Mameniškienė Source Type: research

Genomic characterization of Listeria monocytogenes recovered from dairy facilities in British Columbia, Canada from 2007 to 2017
Listeria monocytogenes is a foodborne pathogen of concern in dairy processing facilities, with the potential to cause human illness and trigger regulatory actions if found in the product. Monitoring for Listeria spp. through environmental sampling is recommended to prevent establishment of these microorganisms in dairy processing environments, thereby reducing the risk of product contamination. To inform on L. monocytogenes diversity and transmission, we analyzed genome sequences of L. monocytogenes strains (n = 88) obtained through the British Columbia Dairy Inspection Program. Strains were recovered from five differe...
Source: Frontiers in Microbiology - March 22, 2024 Category: Microbiology Source Type: research

Detection of Pathogenic Serogroups and Virulence Genes in < em > Listeria monocytogenes < /em > Strains Isolated from Beef and Beef Products Retailed in Gauteng Province, South Africa, Using Phenotypic and Polymerase Chain Reaction (PCR)-Based Methods
Int J Microbiol. 2024 Mar 13;2024:8891963. doi: 10.1155/2024/8891963. eCollection 2024.ABSTRACTSouth Africa recently (2017-18) experienced the largest outbreak of human listeriosis in the world caused by L. monocytogenes following the consumption of "polony," a ready-to-eat meat product. Most (59%) cases originated from Gauteng province, South Africa. As a follow-up study to the outbreak, we used standard bacteriological and molecular methods to determine the prevalence of pathogenic and virulent serogroups of L. monocytogenes in various beef and beef products retailed in Gauteng province, South Africa. The overall prevale...
Source: International Journal of Microbiology - March 21, 2024 Category: Microbiology Authors: James Gana Nomakorinte Gcebe Rebone Moerane Yusuf B Ngoshe Khomotso Moabelo Abiodun A Adesiyun Source Type: research

< em > Listeria monocytogenes: < /em > the silent assassin
J Med Microbiol. 2024 Mar;73(3). doi: 10.1099/jmm.0.001800.ABSTRACTListeriosis is a foodborne infection in humans caused by Listeria monocytogenes. Consumption of contaminated food can lead to severe infection in vulnerable patients, that can be fatal. Clinical manifestations include sepsis and meningitis, and in pregnancy-associated infection, miscarriage and stillbirth. Diagnosis is confirmed by culture and identification of the pathogen from blood, cerebrospinal fluid, vaginal swab, placenta or amniotic fluid. Treatment regimens recommend amoxicillin, ampicillin or an aminoglycoside. Virulence factors mediate bacterial ...
Source: Journal of Medical Microbiology - March 20, 2024 Category: Microbiology Authors: Emily T Fotopoulou Claire Jenkins Ana ïs Painset Corinne Amar Source Type: research

The impact of different acidic conditions and food substrates on Listeria monocytogenes biofilms development and removal using nanoencapsulated carvacrol
This study explores the impact of different acidic conditions of culture media and food matrices on the development and removal of biofilms developed on stainless steel surfaces by wild-type (WT) L. monocytogenes strains as well as in two mutant derivatives, ΔsigB and ΔagrA, that have defects in the general stress response and quorum sensing, respectively. Additionally, the study investigates the efficacy of nanoencapsulated carvacrol as an antimicrobial against L. monocytogenes biofilms developed in Tryptic Soy Broth (TSB) culture media acidified to different pH conditions (3.5, 4.5, 5.5, 6.5), and in food substrates (a...
Source: International Journal of Food Microbiology - March 20, 2024 Category: Food Science Authors: Jina Yammine Agapi I Doulgeraki Conor P O'Byrne Adem Gharsallaoui Nour-Eddine Chihib Layal Karam Source Type: research

The impact of different acidic conditions and food substrates on Listeria monocytogenes biofilms development and removal using nanoencapsulated carvacrol
This study explores the impact of different acidic conditions of culture media and food matrices on the development and removal of biofilms developed on stainless steel surfaces by wild-type (WT) L. monocytogenes strains as well as in two mutant derivatives, ΔsigB and ΔagrA, that have defects in the general stress response and quorum sensing, respectively. Additionally, the study investigates the efficacy of nanoencapsulated carvacrol as an antimicrobial against L. monocytogenes biofilms developed in Tryptic Soy Broth (TSB) culture media acidified to different pH conditions (3.5, 4.5, 5.5, 6.5), and in food substrates (a...
Source: International Journal of Food Microbiology - March 20, 2024 Category: Food Science Authors: Jina Yammine Agapi I Doulgeraki Conor P O'Byrne Adem Gharsallaoui Nour-Eddine Chihib Layal Karam Source Type: research

< em > Listeria monocytogenes: < /em > the silent assassin
J Med Microbiol. 2024 Mar;73(3). doi: 10.1099/jmm.0.001800.ABSTRACTListeriosis is a foodborne infection in humans caused by Listeria monocytogenes. Consumption of contaminated food can lead to severe infection in vulnerable patients, that can be fatal. Clinical manifestations include sepsis and meningitis, and in pregnancy-associated infection, miscarriage and stillbirth. Diagnosis is confirmed by culture and identification of the pathogen from blood, cerebrospinal fluid, vaginal swab, placenta or amniotic fluid. Treatment regimens recommend amoxicillin, ampicillin or an aminoglycoside. Virulence factors mediate bacterial ...
Source: Journal of Medical Microbiology - March 20, 2024 Category: Microbiology Authors: Emily T Fotopoulou Claire Jenkins Ana ïs Painset Corinne Amar Source Type: research

< em > Listeria monocytogenes: < /em > the silent assassin
J Med Microbiol. 2024 Mar;73(3). doi: 10.1099/jmm.0.001800.ABSTRACTListeriosis is a foodborne infection in humans caused by Listeria monocytogenes. Consumption of contaminated food can lead to severe infection in vulnerable patients, that can be fatal. Clinical manifestations include sepsis and meningitis, and in pregnancy-associated infection, miscarriage and stillbirth. Diagnosis is confirmed by culture and identification of the pathogen from blood, cerebrospinal fluid, vaginal swab, placenta or amniotic fluid. Treatment regimens recommend amoxicillin, ampicillin or an aminoglycoside. Virulence factors mediate bacterial ...
Source: Journal of Medical Microbiology - March 20, 2024 Category: Microbiology Authors: Emily T Fotopoulou Claire Jenkins Ana ïs Painset Corinne Amar Source Type: research

< em > Listeria monocytogenes: < /em > the silent assassin
J Med Microbiol. 2024 Mar;73(3). doi: 10.1099/jmm.0.001800.ABSTRACTListeriosis is a foodborne infection in humans caused by Listeria monocytogenes. Consumption of contaminated food can lead to severe infection in vulnerable patients, that can be fatal. Clinical manifestations include sepsis and meningitis, and in pregnancy-associated infection, miscarriage and stillbirth. Diagnosis is confirmed by culture and identification of the pathogen from blood, cerebrospinal fluid, vaginal swab, placenta or amniotic fluid. Treatment regimens recommend amoxicillin, ampicillin or an aminoglycoside. Virulence factors mediate bacterial ...
Source: Journal of Medical Microbiology - March 20, 2024 Category: Microbiology Authors: Emily T Fotopoulou Claire Jenkins Ana ïs Painset Corinne Amar Source Type: research

Intestinal tissue-resident memory T cells maintain distinct identity from circulating memory T cells after in vitro restimulation
Eur J Immunol. 2024 Mar 19:e2350873. doi: 10.1002/eji.202350873. Online ahead of print.ABSTRACTResident memory T (TRM ) cells have been recently established as an important subset of memory T cells that provide early and essential protection against reinfection in the absence of circulating memory T cells. Recent findings showing that TRM expand in vivo after repeated antigenic stimulation indicate that these memory T cells are not terminally differentiated. This suggests an opportunity for in vitro TRM expansion to apply in an immunotherapy setting. However, it has also been shown that TRM may not maintain their identity ...
Source: European Journal of Immunology - March 19, 2024 Category: Allergy & Immunology Authors: Ammarina Beumer-Chuwonpad Felix M Behr Floris P J van Alphen Natasja A M Kragten Arie J Hoogendijk Maartje van den Biggelaar Klaas P J M van Gisbergen Source Type: research