Listeria Monocytogenes - StatPearls - NCBI Bookshelf Listeria monocytogenes is a facultative, intracellular, gram-positive rod that is responsible for causing the infection listeriosis Listeria causes severe infection in the elderly, neonates and the immunocompromised with only a self-limited gastrointestinal infection in the immunocompetent
Pathology Outlines - Listeria monocytogenes The Gram stain indicates a bacterial pathogen consistent with Listeria monocytogenes L monocytogenes is usually transmitted by ingestion of contaminated foods such as raw vegetables, dairy products and meat
Listeria monocytogenes - Wikipedia Named for Joseph Lister, Listeria monocytogenes is a Gram-positive bacterium, in the phylum Bacillota Its ability to grow at temperatures as low as 0 °C permits multiplication at typical refrigeration temperatures, greatly increasing its ability to evade control in human foodstuffs
Listeria monocytogenes: Introduction, Morphology, Pathogenicity Gram Staining: Listeria monocytogenes is gram-positive, meaning it retains the crystal violet stain during the Gram staining procedure When viewed under a microscope after Gram staining, the cells will appear purple Motility: It is motile, possessing flagella that allow it to move
Gram Stain: What It Is, Purpose, Procedure Results - Cleveland Clinic A Gram stain is a laboratory test that checks for bacteria at the site of a suspected infection or in certain bodily fluids A medical laboratory scientist processes the Gram stain, which gives relatively quick results, so healthcare providers can know if bacteria are present, and, if so, the general type(s)
Laboratory diagnosis of Listeriosis caused by Listeria monocytogenes Gram-stain preparations of cerebrospinal fluid (CSF) typically show no organisms because the bacteria are generally present in concentrations below the limit of detection (e g , 10ˆ4 bacteria per milliliter CSF or less) If the Gram stain shows organisms, they are intracellular and extracellular gram-positive coccobacilli
Listeria monocytogenes Identification Chart - Centers for Disease . . . Listeria monocytogenes Identification Chart Summary Major pathogen found in Cerebral Spinal Fluid (CSF) and Blood only Characteristics 1 CSF showing Polymorphonuclear leukocytes (PMNs), Monocytes, and Gram-positive rods (may be intracellular) 2 (a-c)Regular small Gram (+) rods May be short or longer 3 a - Beta hemolysis does NOT
Listeria monocytogenes - Microbe Canvas Of the seven species within the genus Listeria, only L monocytogenes and L ivanovii are pathogenic They have been isolated from soil, decaying vegetables, sewage, water, animal feed, fresh and frozen poultry, raw milk, cheese and slaughter house waste
Listeria Monocytogenes Infection (Listeriosis) Workup - Medscape CSF Gram stain results are positive in less than 50% of patients CSF analysis reveals pleocytosis, and CSF protein levels are moderately elevated CSF glucose levels may be low, and if so, are