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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
©2008 GoogleBacon Bits Recalled for Possible Listeria Contamination - Cherry Creek News
 DigitalJournal.com | Bacon Bits Recalled for Possible Listeria Contamination Cherry Creek News, CO - Consumption of food contaminated with Listeria monocytogenes can cause listeriosis, an uncommon but potentially fatal disease. ... Bacon Bits Recalled for Listeria Bacon bits recalled for Listeria Wisconsin Firm Recalls Bacon Bit Products For Possible Listeria ... |
Listeria Follow-up Stalled - About - News & Issues
 CTV.ca | Listeria Follow-up Stalled About - News & Issues, NY - In August 2008 Canada was faced with a serious outbreak of listeriosis, caused by contaminated food products at a Maple Leaf Foods plant in Toronto. ... Calls erupt for "listeriosis outbreak probe" The back burner Promised listeriosis probe still lacks investigator |
7-Eleven Breakfast Burrito Recall in Colorado: Risk of Listeriosis - AboutLawsuits.com
7-Eleven Breakfast Burrito Recall in Colorado: Risk of Listeriosis AboutLawsuits.com - There have been no reports of Listeriosis food poisoning, but consuming products contaminated with the Listeria monocytogenes bacteria could cause a mild to ... |
Burritos Recalled Due to Possible Listeria Contamination - Consumer Affairs
 DigitalJournal.com | Burritos Recalled Due to Possible Listeria Contamination Consumer Affairs - By Lisa Wade McCormick A Colorado company is recalling approximately 172 pounds of burrito products because of possible Listeria monocytogenes contamination ... Burrito Products For Possible Listeria Contamination 7-Eleven burritos recalled |
Wisconsin Firm Recalls Bacon Bit Products - Food Product Design
Wisconsin Firm Recalls Bacon Bit Products Food Product Design, IL - ... a Cudahy, Wis., firm, is recalling approximately 3590 pounds of bacon bit products that may be contaminated with Listeria monocytogenes. ... |
Metro Snapshot: January 5, 2009 - Metro Canada - Vancouver
Metro Snapshot: January 5, 2009 Metro Canada - Vancouver, Canada - LISTERIA PROBE: Prime Minister Stephen Harper's government has yet to appoint the leader of an"arms-length" probe into last year's listeria outbreak, ... |
Health Hazard Alert: Nostrano Brand Genoa Mild Sausage May Contain ... - MSNBC
Health Hazard Alert: Nostrano Brand Genoa Mild Sausage May Contain ... MSNBC - Food contaminated with Listeria monocytogenes may not look or smell spoiled. Consumption of food contaminated with this bacteria may cause listeriosis, ... |
What's next for food supply after deadly outbreak? - CTV.ca
 CTV.ca | What's next for food supply after deadly outbreak? CTV.ca, Canada - Scientists are always developing strategies for ridding foods of bacteria, such as Listeria monocytogenes, which last summer also sickened dozens of people. ... |
Listeria outbreak rocketed Canada's food safety system to top of ... - The Canadian Press
Listeria outbreak rocketed Canada's food safety system to top of ... The Canadian Press, TORONTO - TORONTO The deadly, nationwide outbreak of a previously anonymous bacterium has pushed Listeria and food safety to the forefront of the public ... |
Sausages recalled over possible Listeria contamination - TheMedGuru
 eFluxMedia | Sausages recalled over possible Listeria contamination TheMedGuru, India - By Jyoti Pal Washington, United States, December 27: Amid concerns of possible Listeria contamination, T. Piekutowski European Style Sausage, a St. Louis, ... St. Louis Sausage Shop Recalls 750 Pounds Of Meat Sausage Meat Being Recalled Due to Listeria Missouri firm recalls possibly tainted sausages |
| Strain annotated in NMPDR | Serotype | Genome size, bp | Protein Encoding Genes (PEGs) | Named genes in subsystems | Named genes not in subsystems | Hypothetical genes in subsystems | Hypothetical genes not in subsystems | Subsystems | RNAs |
|---|---|---|---|---|---|---|---|---|---|
| Listeria innocua Clip11262 | 6a | 3,011,208 | 3,007 | 1414(45.5%) | 924(29.7%) | 77(2.5%) | 694(22.3%) | 307 | 133 |
| Listeria monocytogenes 10403S | 1/2a | 2,866,709 | 2,873 | 1215(41.9%) | 1009(34.8%) | 52(1.8%) | 622(21.5%) | 270 | 70 |
| Listeria monocytogenes Aureli 1997 | 4b | 3,006,068 | 3,221 | 1295(39.6%) | 1132(34.6%) | 55(1.7%) | 788(24.1%) | 267 | 97 |
| Listeria monocytogenes EGD-e | 1/2a | 2,944,528 | 2,867 | 1422(46.6%) | 972(31.8%) | 67(2.2%) | 591(19.4%) | 312 | 134 |
| Listeria monocytogenes F6900 | 1/2a | 2,958,319 | 3,262 | 1379(41.9%) | 1116(33.9%) | 57(1.7%) | 737(22.4%) | 270 | 71 |
| Listeria monocytogenes FSL J1-194 | 1/2b | 2,986,227 | 3,693 | 1528(40.8%) | 1302(34.8%) | 72(1.9%) | 844(22.5%) | 269 | 98 |
| Listeria monocytogenes FSL J2-071 | 4c | 3,149,923 | 3,373 | 1309(38.3%) | 1181(34.6%) | 56(1.6%) | 870(25.5%) | 269 | 91 |
| Listeria monocytogenes FSL N1-017 | 4b | 2,857,865 | 3,705 | 1575(42.1%) | 1266(33.8%) | 62(1.7%) | 841(22.5%) | 266 | 83 |
| Listeria monocytogenes FSL N3-165 | 1/2a1 | 2,886,689 | 2,882 | 1244(42.6%) | 981(33.6%) | 53(1.8%) | 639(21.9%) | 270 | 80 |
| Listeria monocytogenes FSL R2-503 | 1/2b | 3,001,696 | 4,767 | 1996(41.5%) | 1716(35.7%) | 74(1.5%) | 1026(21.3%) | 269 | 95 |
| Listeria monocytogenes J0161 | 1/2a | 3,051,828 | 3,181 | 1279(39.9%) | 1110(34.6%) | 55(1.7%) | 765(23.8%) | 272 | 70 |
| Listeria monocytogenes J2818 | 1/2a | 2,971,223 | 3,177 | 1330(41.3%) | 1092(33.9%) | 55(1.7%) | 745(23.1%) | 270 | 92 |
| Listeria monocytogenes str. 1/2a F6854 | 1/2a | 2,950,285 | 2,972 | 1430(47.2%) | 897(29.6%) | 68(2.2%) | 633(20.9%) | 309 | 132 |
| Listeria monocytogenes str. 4b F2365 | 4b | 2,905,310 | 2,856 | 1372(45.7%) | 920(30.6%) | 63(2.1%) | 649(21.6%) | 305 | 130 |
| Listeria monocytogenes str. 4b H7858 | 4b | 2,972,254 | 3,068 | 1394(45.2%) | 926(30.0%) | 66(2.1%) | 701(22.7%) | 306 | 118 |
| Listeria welshimeri serovar 6b str. SLCC5334 | 6b | 2,814,130 | 2,708 | 1132(40.5%) | 1003(35.9%) | 47(1.7%) | 610(21.8%) | 266 | 133 |
