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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 GoogleCooks Foods recalls Tahini products after Listeria found - sharechat
Cooks Foods recalls Tahini products after Listeria found sharechat, New Zealand - ... precursor to an initial public offering, recalled Tahini products sold under its Olive Grove and Sahara brands after traces of Listeria were detected. ... |
We should have spoken up on Listeria: food agency - OverTheLimit.info
 OverTheLimit.info | We should have spoken up on Listeria: food agency OverTheLimit.info, Canada - Ottawa - The Canadian Food Inspection Agency recently said that they should have done a better job during this summer s listeria out break. ... |
We should have spoken up on Listeria: food agency - Hamilton Spectator
We should have spoken up on Listeria: food agency Hamilton Spectator, Canada - The Canadian Food Inspection Agency could have done a far better job communicating with the public during this summer's listeria outbreak, a top official at ... |
Family sues smallgoods company over death - ABC Online
Family sues smallgoods company over death ABC Online, Australia - Documents lodged with the Supreme Court allege Mr Formosa was given meat contaminated with listeria and supplied by Conroy's Smallgoods. ... |
A barbecued chicken lunch on a lazy afternoon can really turn your ... - Sydney Morning Herald
A barbecued chicken lunch on a lazy afternoon can really turn your ... Sydney Morning Herald, Australia - Pregnancy books and doctors always bang on about the risks of Listeria bacteria to unborn babies. This does lead to tragedy in a small number of cases. ... |
Recall: Hot Dogs Possibly Listeria Contaminated - Newsinferno.com
 WFLA | Recall: Hot Dogs Possibly Listeria Contaminated Newsinferno.com, NY - Consumption of food contaminated with Listeria monocytogenes can cause listeriosis, an uncommon but potentially fatal disease that can be particularly ... Zeigler-brand hot dog products recalled Alabama-based Zeigler issues recall of hot dogs Hot Dog Recall: Possible Contamination with Listeria |
Maple Leaf Posts 4th Quarterly Loss After Listeria (Correct) - Bloomberg
 CTV.ca | Maple Leaf Posts 4th Quarterly Loss After Listeria (Correct) Bloomberg - ... recalling deli meats and suspending production at a Toronto plant identified as the source of a listeria outbreak that led to the deaths of 20 people. ... Maple Leaf Foods profits sliced by listeria outbreak Maple Leaf Foods Reports Q3 Loss Of $12.9 Million Due To Listeria ... Maple Leaf Foods says listeria impact lingers |
Maple Leaf CEO's memos to workers give glimpse of struggles with ... - CBC.ca
 CBC.ca | Maple Leaf CEO's memos to workers give glimpse of struggles with ... CBC.ca, Canada - (Jeff De Booy/Winnipeg Free Press/Canadian Press) Weeks before the word listeria became a common term in households across Canada, the company at the centre ... Canada to tighten listeria testing regulations after deadly outbreak Regulations will force food companies to test for listeria: Report Federal Government to Introduce New Listeria Testing Rules In Food ... |
Listeria discovery: Avoid sausages from Finsbr ten - Aftenbladet.no
Listeria discovery: Avoid sausages from Finsbr ten Aftenbladet.no, Norway - The withdrawal is due to the discovery of the Listeria monocytogenes bacteria in some of Finsbr ten and Vita hjertego s barbeque sausages. ... |
Maple Leaf appoints chief food safety officer in wake of Listeria ... - The Canadian Press
Maple Leaf appoints chief food safety officer in wake of Listeria ... The Canadian Press, TORONTO - TORONTO Maple Leaf Foods has appointed a chief food safety officer, a first for the company, as they try to recover from a deadly Listeria outbreak. ... Maple Leaf names new food-safety chief Business newsmaker Maple Leaf names new safety chief |
| 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 |
