Classification of listeria monocytogenes
What is the classification of Listeria?
Bacilli is a taxonomic class of bacteria that includes two orders, Bacillales and Lactobacillales, which contain several well-known pathogens such as Bacillus anthracis. Bacilli are almost exclusively gram-positive bacteria.
The name Bacillus, capitalized and italicized, refers to a specific genus of bacteria.
The name Bacillus, capitalized and italicized, refers to a specific genus of bacteria.
What type of organism is Listeria monocytogenes?
bacteria
Listeria monocytogenes (L. monocytogenes) is a species of pathogenic (disease-causing) bacteria that can be found in moist environments, soil, water, decaying vegetation and animals, and can survive and even grow under refrigeration and other food preservation measures. When people eat food contaminated with L.
What kingdom is Listeria monocytogenes?
Bacteria are ubiquitous, mostly free-living organisms often consisting of one biological cell. They constitute a large domain of prokaryotic microorganisms. Typically a few micrometres in length, bacteria were among the first life forms to appear on Earth, and are present in most of its habitats.
What is the scientific name for Listeria monocytogenes?
Is Listeria a bacteria or virus?
Listeriosis is a serious infection usually caused by eating food contaminated with the bacterium Listeria monocytogenes.
What disease does Listeria monocytogenes cause?
Listeriosis is a serious infection caused by the germ Listeria monocytogenes. People usually become ill with listeriosis after eating contaminated food. The disease primarily affects pregnant women, newborns, older adults, and people with weakened immune systems.
What are symptoms of Listeria monocytogenes?
The symptoms vary with the infected person: Higher-risk people other than pregnant women: Symptoms can include fever, muscle aches, headache, stiff neck, confusion, loss of balance, and convulsions. Pregnant women: Pregnant women typically experience only fever, and other non-specific symptoms like chills and headache.
Where is Listeria monocytogenes found?
Listeria monocytogenes are widely distributed in nature. They can be found in soil, water, vegetation and the faeces of some animals and can contaminate foods. Listeriosis is an infectious disease caused by the bacterium Listeria monocytogenes.
Is Listeria monocytogenes Gram-positive or negative?
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.
Is Listeria a spore forming bacteria?
Listeria monocytogenes, a facultative intracellular non-spore forming gram-positive pathogen, uses a number of strategies to ursurp and harness host cell processes to invade, proliferate, move intracellularly and effect cell-to-cell spread during the course of infection.
Is Listeria eukaryotic or prokaryotic?
The bacterial pathogen Listeria monocytogenes: an emerging model in prokaryotic transcriptomics.
Is Listeria monocytogenes autotrophic or heterotrophic?
For heterotrophic organisms including pathogenic bacteria such as L. monocytogenes and their eukaryotic host cells, simple carbohydrates, amino acids, and glycerol are among the typical carbon sources and, therefore, serve as suitable tracers in these labeling studies.
Is Listeria monocytogenes aerobic or anaerobic?
facultative anaerobic bacterium
Listeria monocytogenes is a Gram-positive facultative anaerobic bacterium that is responsible for the disease, listeriosis.
Is Listeria Gram-positive or negative?
Listeria monocytogenes is a facultative, intracellular, gram-positive rod that is responsible for causing the infection listeriosis.
Is Listeria monocytogenes unicellular or multicellular?
Domain: Bacteria – As a group under the domain Bacteria, Listeria consists of prokaryotic single-celled organisms. As such, they have a simple cell structure lacking membrane-bound organelles.
Why does Listeria monocytogenes have the species name monocytogenes?
monocytogenes to honor the surgeon Joseph Lister, who was also the namesake for the mouthwash Listerine. Listeria monocytogenes is a Gram-positive non-spore-forming rod on the order of 0.5–2 μm in length.
What are the characteristics of Listeria?
Listeria spp. are small gram-positive rod (0.5–4 μm in diameter and 0.5–2 μm in length), non-spore-forming, facultative anaerobic, catalase-positive, and oxidase-negative organisms. Listeria has tumbling motility at 20–25°C due to peritrichous flagella.
What is the Gram reaction of Listeria monocytogenes?
The causative organism, Listeria monocytogenes is a Gram-positive bacillus, that may resemble diphtheroids on Gram stain. L. monocytogenes is intrinsically resistant to the cephalosporins and the treatment of choice is ampicillin.