نتایج جستجو برای: listeria

تعداد نتایج: 11406  

Background & Aim: Listeria monocytogenes is one of the main food-borne bacterial pathogens and its control is currenly considered as the most important challenges in food industry. This study was aimed to investigate the effect of Cuminum cyminum essence and Nisin in preventing the growth of Listeria monocytogenes in the minced meat of Schizothorax zarudnyi. Methods: The analysis of the main c...

2015
Kwang Pyo Kim Atul K. Singh Xingjian Bai Lena Leprun Arun K. Bhunia

The goal of this study was to develop the Listeria species-specific PCR assays based on a house-keeping gene (lmo1634) encoding alcohol acetaldehyde dehydrogenase (Aad), previously designated as Listeria adhesion protein (LAP), and compare results with a label-free light scattering sensor, BARDOT (bacterial rapid detection using optical scattering technology). PCR primer sets targeting the lap ...

Journal: :Applied and environmental microbiology 1991
S H Notermans J Dufrenne M Leimeister-Wächter E Domann T Chakraborty

In this study, 468 Listeria strains were checked for the presence of phosphatidylinositol-specific phospholipase C (PI-PLC) activity by using a simple assay that consisted of overlaying colonies formed on agar plates with L-alpha-phosphatidylinositol as substrate. In this assay, PI-PLC-active colonies show turbid halos around the colonies as a result of the release of insoluble diacylglycerol f...

Journal: :Infection and immunity 1979
A M Fulton W Croft M M Dustoor A A Blazkovec

Studies using Listeria monocytogenes as an antitumor agent were initiated to determine the requirements for Listeria-mediated tumor inhibition to occur. When Strain 13 guinea pigs were injected with an admixture of viable Listeria and a methylcholanthrene-induced fibrosarcoma in a ratio of 1 bacterium to 100 tumor cells, Listeria had a marked capacity to inhibit tumor growth. This confirms an e...

Introduction: This study was intended to determine the presence and distribution of Listeria monocytogenes in various meat and dairy products from Qazvin Province by culture followed by biochemical and morphological assays. The identity of the isolates was further obtained by amplification of prfA gene in bacteria isolates. This gene is a transcriptional activator of virulence gene ex...

Journal: :iranian journal of public health 0
m zamani-zadeh m sheikh-zeinoddin s soleimanian-zad

background : listeria monocytogenes is of major concern to the food industry in general and the dairy industry in particular. little is known about incidence of this pathogenic bacterium in dairy products in iran. methods: a survey was made from 23 september 2006 to 22 june 2007 for listeria species in ninety samples of tradi­tional and industrial cheeses, in milk and surface where the cheeses ...

Journal: :International journal of systematic bacteriology 1996
B Sallen A Rajoharison S Desvarenne F Quinn C Mabilat

In order to establish the taxonomic value of 16S rRNA and 23S rRNA for distinguishing Listeria species, the complete 23S rRNA sequences for all Listeria species were determined by using the type strains. We designed and experimentally validated a universal 23S rRNA sequencing method, which included PCR amplification of the rDNA gene and direct cycle sequencing of the amplicon with eubacterial p...

Journal: :international journal of molecular and cellular medicine 0
gholamreza motalleb department of biology, university of zabol, zabol, iran.سازمان اصلی تایید شده: دانشگاه زابل (zabol university)

listeria monocytogenes can cause serious infection and recently, relapse of listeriosis has been reported in leukemia and colorectal cancer, and the patients with klebsiella pneumoniae are at increased risk of colorectal cancer. translation initiation codon recognition is basically mediated by shine-dalgarno (sd) and the anti-sd sequences at the small ribosomal rna (ssu rrna). in this research,...

Journal: :Infection and immunity 1978
L A Baker P A Campbell

A significant decrease in murine resistance to Listeria monocytogenes was induced by using crude Listeria cell wall fraction (LCWF) and purified Listeria cell walls (PF). When equal amounts of these materials were injected, PF was more effective than LCWF in decreasing resistance. The PF effect was dose dependent when measured either as a decrease in 50% lethal dose of the Listeria challenge or...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2011
Andrea L Radtke Kelsi L Anderson Michael J Davis Matthew J DiMagno Joel A Swanson Mary X O'Riordan

Virulence of the intracellular pathogen Listeria monocytogenes (Listeria) requires escape from the phagosome into the host cytosol, where the bacteria replicate. Phagosomal escape is a multistep process characterized by perforation, which is dependent on the pore-forming toxin listeriolysin O (LLO), followed by rupture. The contribution of host factors to Listeria phagosomal escape is incomplet...

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