background the genus-listeria has two pathogenic species namely, listeria monocytogenes and listeria ivanovii. of these, l. monocytogenes is a well-known cause of abortion, encephalitis and septicaemia in man and animals. listeria ivanovii is an animal pathogen and in rare cases causes human infection. contamination of ovine carcasses during the slaughter and processing is a major risk for food...

Aim: This study investigates the prevalence of Listeria spp. in fresh produce sold in the Canterbury region of New Zealand. Background: L. monocytogenes is a common pathogenic bacterium that can be present and grow on fresh produce. Therefore, systematic risk assessment is needed to avoid a food safety scare. Results: Microbiological analysis to detect Listeria spp. in fresh produce samples sho...

For two large beef processing plants, one located in the southern United States (plant A) and one located in the northern United States (plant B), prevalence of Escherichia coli O157:H7, Listeria spp., Listeria monocytogenes, and Salmonella was determined for hide, carcass, and facility environmental samples over the course of 5 months. The prevalence of E. coli O157:H7 (68.1 versus 55.9%) and ...

Spleen cells of mice infected with Listeria monocytogenes were adoptively transferred to normal mice. Such lymphocytes conferred resistance to a lethal challenge with Listeria. Hyperimmunization of the donor reduces the number of cells necessary to transfer effective immunity. Such spleen cells if treated with anti-theta serum do not transfer resistance to Listeria. Hence, thymus (T) lymphocyte...

the innate immune system utilizes pattern recognition receptors (prrs) to recognize microbes. pathogens contain various molecules with diverse effects on immune response. in this study, we evaluated the effect of dna and protein components derived from two intracellular microorganisms including listeria monocytogenes (l.monocytogenes) and toxoplasma gondii (t. gondii) on dendritic cells (dcs) a...

objectives in this study, the effect of coating glass and steel surfaces by copper nanoparticles (cunps) in inhibiting the biofilm formation by listeria monocytogenes and pseudomonas aeruginosa was examined. materials and methods the minimal inhibitory concentrations (mics) of synthesized cunps were measured against l. monocytogenes and p. aeruginosa by using the broth-dilution method. the cell...

Testing for Listeria is challenging because of its slow growth rate. Recently, we described a rapid Listeria culture isolation method. This method can be improved by utilizing a rapid molecular detection test such as the Assurance GDS tests for Listeria and Listeria monocytogenes. These two methods (culture isolation and Assurance GDS) use different enrichment strategies that may affect the num...

The study was carried out to determine the prevalence and the in-vitro pathogenicity of Listeria monocytogenes in sheep and goats reared by nomads of Jammu region of J&K, in addition to biochemical characterization of isolates. A total of 125 samples comprising of sheep and goat faecal samples and their rectal swabs were collected. Isolation of Listeria species involved the enrichment of the sa...

Listeria monocytogenes (commonly called Listeria) named for Joseph Lister. Listeria monocytogenes, is the bacterium that causes the infection listeriosis. It is a facultative anaerobic bacterium, capable of graving and reproducing inside the host’s cells, and is one of the most virulent food-borne pathogens of clinical infections resulting in death. Listeriosis is the leading cause of death amo...

introduction: different microbial compounds can induece maturation of dendritic cells (dcs) into dc1 or dc2 .in the present study, we used tumor antigen pulsed dendritic cell that matured with listeria monocytogenes antigen and cholera toxin (ct) in the treatment of a murin model of cancer. material and methods: tumor cells (wehi-164 balb/c derived fibrosarsoma) were injected subcutaneously to ...