This article describes the electrical characterization of live and heat-inactivated micro-organisms within microstructures. Electrophoretic movement of live and heat-inactivated Listeria innocua on interdigitated fingered electrodes confirmed the presence of negative charges on the live micro-organisms and demonstrated positive or neutral charges on the heat-inactivated micro-organisms. A micro...

Listeria monocytogenes is a Gram-positive, facultative intracellular and invasive bacterium that has tropism to the placenta, and causes fetal morbidity and mortality in several mammalian species. While infection with L. monocytogenes and L. ivanovii are known as important causes of abortion and reproductive failure in cattle, the pathogenesis of maternal-fetal listeriosis in this species is po...

BACKGROUND Antioxidants are of great importance for preventing oxidative stress that may cause several degenerative diseases. Studies have indicated phytochemicals have high free-radical scavenging activity, which helps to reduce the risk of chronic diseases. The aim of the present study is the determination of antioxidant properties, polyphenolic content and multidrug resistant bacteria of Sal...

Testing for Listeria spp. was performed in milk samples collected from Syrian provinces, from August 2005 to December 2008. A total of 766 milk samples were collected from randomly selected dairy farms. Using conventional bacteriologic methods, 84 samples (10.96%) were positive for Listeria spp. The isolated Listeria spp. strains were catalase positive, oxidase negative, did not produce H2S and...

INTRODUCTION Listeria species are susceptible to most antibiotics. However, over the last decade, increasing reports of multidrug-resistant Listeria spp. from various sources have prompted public health concerns. The objective of this study was to characterize the antibiotic susceptibility of Listeria spp. and the genetic mechanisms that confer resistance. METHODOLOGY Forty-six Listeria spp. ...

Polymorphonuclear leukocytes (PMN) are essential for resolution of infections with Listeria monocytogenes. The present study investigated the role of the listerial exotoxins listeriolysin (LLO) and phosphatidylinositol-specific phospholipase C (PlcA) in human neutrophil activation. Different Listeria strains, mutated in individual virulence genes, as well as purified LLO were used. Coincubation...

Introduction: Listeria monocytogenes is a pathogen bacteria transmitted by food stuffs. Due to the lack of information about contamination of retail chicken meat to Listeria monocytogenes in Iran, this study aimed to determine the prevalence and antibiotic resistance of this bacterium in retail chicken meat in Yazd, Iran. Materials and Methods: This cross-sectional descriptive study was conduc...