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Listeria monocytogenes
I. Organism Information
A. Taxonomy Information
1. Species
a. Listeria monocytogenes
i. Taxonomy ID: 1639
ii. Description:
Listeria monocytogenes is a low G+C, Gram-positive bacteria that is closely related to Bacillus, Clostridium, Enterococcus, Streptococcus, and Staphylococcus. L. monocytogenes are facultativly anaerobic, catalase-positive rods of 0.4 by 1 to 1.5 µm that do not form spores, have no capsule, and are motile at 10 to 25 degrees Celcius. They can cause serious, localized and generalized infections in humans and a variety of other vertebrates, including domesticated and wild birds and mammals. Listeria microorganisms were discovered in 1924, at Cambridge University by E.G.D. Murray, R.A. Webb, and M.B.R. Swann as the etiological agent of a septicemic disease affecting rabbits and guinea pigs (1).
iii. Variants
Listeria monocytogenes serotype 1/2a
Taxonomy ID: 169963
Listeria monocytogenes serotype 4b
Taxonomy ID: 265669
B. Lifecycle and Morphology
1. Intracellular:
The intracellular phase of the life cycle involves early escape from the phagocytic vacuole, rapid multiplication within the cytoplasm, bacterially induced actin-based motility, and direct spread to neighboring cells, in which the cycle is reinitiated. This shelters the spread of Listeriae from the humoral immune system (1).
To contribute a blurb on lifecycle, serotypes or handling the organism in healthcare or laboratory facilities, please contact help@nmpdr.org Your contribution will be credited with a byline.
a. Shape:
Regular, short rods with rounded ends, 0.4 μm by 1 - 1.5 μm. Some cells may be curved. Cells occur singly, or in short chains. Cells may be arranged at an angle to each other to give V-forms or in groups lying parallel along the long axis (2).
b. Picture:
SEM image of Listeria in tissue by Elizabeth White, CDC
2. Environmental:
a. Picture:
SEM image of Listeria after 2 days growth at 20° C on a stainless steel surface (size bar is 10 μm) by P. Chavant, M. Hébraud, B. Martinie, INRA, Theix
C. Genome Summary
1. Genome of Listeria monocytogenes 4b F2365
a. Chromosome
i. RefSeq Accession Number: NC_002973
ii. Size: 2,905,187 bp
iii. Serotype 4b (genomic division II) isolate from contaminated cheese that caused a lethal outbreak of listeriosis in 1985.
2. Genome of Listeria monocytogenes 1/2a EGD-e
a. Chromosome
i. RefSeq Accession Number: NC_003210
ii. Size: 2,944,528 bp
iii. Serotype 1/2a
3. Genome of Listeria monocytogenes 1/2a F6854
a. Chromosome
i. RefSeq Accession Number: NZ_AADQ00000000
ii. Size: 2,950,285 bp
iii. Serotype 1/2a
4. Genome of Listeria monocytogenes 4b H7858
a. Chromosome
i. RefSeq Accession Number: NZ_AADR00000000
ii. Size: 2,972,254 bp
iii. Serotype 4b
II. References
1. Vazquez-Boland JA, Kuhn M, Berche P, Chakraborty T, Dominguez-Bernal G, Goebel W, Gonzalez-Zorn B, Wehland J, Kreft J. (2001) Listeria pathogenesis and molecular virulence determinants. Clin Microbiol Rev. 14(3):584-640.
3. Mascola L, Lieb L., Chiu J, Fannin SL and Linnan MJ. (1988) Listeriosis: an uncommon opportunistic infection in patients with acquired immunodeficiency syndrome. A report of five cases and a review of the literature. Am. J. Med. 84: 162-164.
4. Todars Online Textbook of Bacteriology Hide info
Listeria - Google News
©2010 GoogleRecall on Moonstruck Camembert cheese - Canada.com
 CBC.ca | Recall on Moonstruck Camembert cheese Canada.com This recall is the result of a routine sampling program by the BCCDC, which revealed that one wheel of the finished product contained the Listeria ... BC cheese maker increases testing after recall Camembert cheese may contain listeria Listeria leads to BC cheese recall |
Advaxis Confirms Long-Term Stability of Listeria-Based Immunotherapeutics ... - MarketWatch (press release)
Advaxis Confirms Long-Term Stability of Listeria-Based Immunotherapeutics ... MarketWatch (press release) The original good manufacturing practice (GMP) batch of the Company's Listeria-based immunotherapeutic which has been kept in a frozen state has been tested ... |
Estrella Family Creamery Recalls Cheese for Listeria - Newsinferno.com
Estrella Family Creamery Recalls Cheese for Listeria Newsinferno.com Just prior, we wrote that the Estrella Family Creamery recalled its Red Darla cheese over contamination concerns with the Listeria monocytogenes pathogen. ... WA Creamery Recalls More Cheese |
USPTO Grants Advaxis New Listeria Based Fusion Protein Patent - MarketWatch (press release)
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Montesano creamery recalls some cheese - Seattle Times
Montesano creamery recalls some cheese Seattle Times The company says the cheese may be contaminated with Listeria monocytogenes. The Associated Press The Estrella Family Creamery of Montesano, Wash., ... Another cheese recall for Farmers Market vendor Montesano creamery recalls some cheese |
Stockguru.com: Advaxis Inc. is in the StockGuru Spotlight for March 9, 2010 - Trading Markets (press release)
Stockguru.com: Advaxis Inc. is in the StockGuru Spotlight for March 9, 2010 Trading Markets (press release) Advaxis is a biotechnology company developing proprietary, live, attenuated Listeria monocytogenes (Listeria) vaccines that deliver engineered tumor ... |
Kellogg's Warned Over Listeria in Eggo Plant - Food Safety News
 InjuryBoard.com (blog) | Kellogg's Warned Over Listeria in Eggo Plant Food Safety News A new "Warning Letter" from the US Food and Drug Administration to the Kellogg's Company raises questions about whether the Listeria problem at its Atlanta ... Kellogg Gets FDA Warning Letter for Listeria Found in Eggo Facility FDA issues warning to Kellogg over listeria bacteria at Eggo plant Kellogg Must Fix Sanitation at Eggo Plant, FDA Says |
Queseria Bendita Listeria-Contaminated Cheese Recall - Food Poison Journal
 Food Poison Journal | Queseria Bendita Listeria-Contaminated Cheese Recall Food Poison Journal The FDA announced yesterday a recall by Queseria Bendita of certain cheese products due to fears that the products are contaminated by Listeria ... Washington company recalling 3 soft cheeses News - Monday 2/22 - Mothers, babies in Oregon infected with listeria from ... Illnesses prompt recall of cheese made in Yakima |
USA pays price for food-borne illness: $152B a year - USA Today
 Los Angeles Times | USA pays price for food-borne illness: $152B a year USA Today The three most expensive illnesses for the nation were campylobacter, common in poultry, at $18.8 billion; salmonella at $14.6 billion; and listeria at $8.8 ... Foodborne illnesses cost $152B per year--study Foodborne illnesses cost United States $152bn a year- report Foodborne Illnesses Costs Us 152 Billion A Year |
Tips on keeping food uncontaminated - Monsters and Critics.com
Tips on keeping food uncontaminated Monsters and Critics.com Listeria monocytogenes, commonly called listeria, is a bacterium that can be harmful to health. Lothar Jaensch, head of the research group for proteomics at ... |
