Taxonomy: Bacteria; Firmicutes; Bacilli; Bacillales; Listeriaceae;

Listeria

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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 of Listeria monocytogenes

SEM image of Listeria in tissue by Elizabeth White, CDC

2. Environmental:


a. Picture:

SEM of Listeria monocytogenes biofilm

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.

2.  Bergey's Manual of Determinative Bacteriology, 9th edition. John G. Holt, Noel R. Krieg, Peter H.A. Sneath, James T. Staley, and Stanley T. Williams, editors. Baltimore: Williams and Wilkins, 1994, p.1235

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

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Listeria - Google News

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Amrita brand protein bars recalled because of possible Listeria ... - ABC Action News


ABC Action News

Amrita brand protein bars recalled because of possible Listeria ...
ABC Action News
Amrita Health Foods is recalling nine flavors of their protein bars due to potential Listeria contamination.

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Public consultation: Listeria in ready-to-eat foods European Food ... - EU News


EU News

Public consultation: Listeria in ready-to-eat foods European Food ...
EU News
EFSA has opened a public consultation on its scientific opinion looking at Listeria monocytogenes contamination of ready-to-eat (RTE) foods and related risks ...

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60-Minute Listeria Test Advances Food Safety - SelectScience - SelectScience


SelectScience

60-Minute Listeria Test Advances Food Safety - SelectScience
SelectScience
Neogen' s new Listeria Right Now test system can detect all species of Listeria, including the pathogenic L. monocytogenes, in under 60 minutes through their ...

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Product News: 60-Minute Listeria Test Advances Food Safety - SelectScience


SelectScience

Product News: 60-Minute Listeria Test Advances Food Safety
SelectScience
Neogen's new Listeria Right Now test system can detect all species of Listeria, including the pathogenic L. monocytogenes, in under 60 minutes through their ribosomal RNA (rRNA). The system's effectiveness has been validated by NSF International to ...

Protein Bars Recalled for Listeria Risk - NBC4 Washington - NBC4 Washington


Food Safety News

Protein Bars Recalled for Listeria Risk - NBC4 Washington
NBC4 Washington
A brand of protein bars has been recalled by its manufacturer because it may be contaminated with listeria.
Amrita brand protein bars recalled because of Listeria riskFood Safety News
Sunflower Seeds and Butter Recalled over Listeria Food Poison ...Food Poison Journal
Amrita Bars Recalled for Possible Listeria ContaminationFood Poisoning Bulletin

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Bhu Foods Voluntarily Recalls Protein Bars Due To Listeria Risk ... - Patch.com


Bhu Foods Voluntarily Recalls Protein Bars Due To Listeria Risk ...
Patch.com
San Diego, CA - The San Diego-based company's sunflower seeds supplier, Hudson Valley Foods, Inc., reported finding Listeria in its production facility.
Bhu Protein Bars Recalled for Possible Listeria ContaminationFood Poisoning Bulletin

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ALP urges flexibility to achieve Listeria control - FoodQualityNews.com


FoodQualityNews.com

ALP urges flexibility to achieve Listeria control
FoodQualityNews.com
The group made the comments on the US Food and Drug Administration's (FDA) guidance on the control of Listeria monocytogenes (Lm) in ready-to-eat (RTE) foods. FDA released draft guidance in January to provide current thinking and encourage ...

Bhu Foods Voluntarily Recalls Protein Bars Due To Listeria Risk - Patch.com


Patch.com

Bhu Foods Voluntarily Recalls Protein Bars Due To Listeria Risk
Patch.com
The San Diego, CA-based company voluntarily recalled its protein bars after its organic sunflower seeds supplier, Hudson Valley Foods, Inc., located in Highland, reported finding Listeria monocytogenes in its production facility in recent weeks ...

Neogen targets Listeria in environmental samples - Food Quality News - FoodQualityNews.com


FoodQualityNews.com

Neogen targets Listeria in environmental samples - Food Quality News
FoodQualityNews.com
Neogen Corporation has launched a test that detects Listeria in environmental samples without the need for enrichment.

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Wegmans recalls energy bars for possible listeria contamination ... - Fredericksburg.com


Fredericksburg.com

Wegmans recalls energy bars for possible listeria contamination ...
Fredericksburg.com
Wegmans has issued a recall for three flavors of Amrita Bars sold at locations including its Fredericksburg store.

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Listeria genome sequence annotation status: click numbers to browse lists of genes or subsystems

Strain annotated in NMPDR Serotype Genome size, bp Protein Encoding Genes (PEGs) Sort 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 1418(45.6%) 925(29.7%) 76(2.4%) 691(22.2%) 324 133
Listeria monocytogenes 10403S 1/2a 2,866,709 2,873 1268(43.7%) 966(33.3%) 53(1.8%) 614(21.2%) 296 74
Listeria monocytogenes Aureli 1997 4b 3,006,068 3,221 1345(41.1%) 1091(33.3%) 56(1.7%) 780(23.8%) 291 101
Listeria monocytogenes EGD-e 1/2a 2,944,528 2,867 1426(46.7%) 972(31.8%) 66(2.2%) 589(19.3%) 326 134
Listeria monocytogenes F6900 1/2a 2,958,319 3,262 1426(43.3%) 1081(32.8%) 58(1.8%) 726(22.1%) 294 74
Listeria monocytogenes FSL J1-194 1/2b 2,986,227 3,692 1589(42.4%) 1245(33.2%) 74(2.0%) 839(22.4%) 293 101
Listeria monocytogenes FSL J2-071 4c 3,149,923 3,373 1357(39.7%) 1143(33.4%) 56(1.6%) 862(25.2%) 293 94
Listeria monocytogenes FSL N1-017 4b 2,857,865 3,704 1636(43.7%) 1216(32.5%) 64(1.7%) 831(22.2%) 291 88
Listeria monocytogenes FSL N3-165 1/2a1 2,886,689 2,882 1296(44.4%) 940(32.2%) 54(1.8%) 630(21.6%) 296 84
Listeria monocytogenes FSL R2-503 1/2b 3,001,696 4,767 2030(42.2%) 1689(35.1%) 79(1.6%) 1016(21.1%) 292 99
Listeria monocytogenes J0161 1/2a 3,051,828 3,181 1334(41.5%) 1064(33.1%) 56(1.7%) 757(23.6%) 298 74
Listeria monocytogenes J2818 1/2a 2,971,223 3,177 1382(42.9%) 1050(32.6%) 57(1.8%) 735(22.8%) 295 97
Listeria monocytogenes str. 1/2a F6854 1/2a 2,950,285 2,972 1441(47.6%) 892(29.4%) 66(2.2%) 631(20.8%) 323 132
Listeria monocytogenes str. 4b F2365 4b 2,905,310 2,856 1384(46.1%) 911(30.3%) 62(2.1%) 648(21.6%) 318 130
Listeria monocytogenes str. 4b H7858 4b 2,972,254 3,068 1405(45.5%) 915(29.6%) 67(2.2%) 700(22.7%) 319 118
Listeria welshimeri serovar 6b str. SLCC5334 6b 2,814,130 2,708 1196(42.8%) 940(33.7%) 48(1.7%) 609(21.8%) 295 152

Topic revision: r5 - 23 Aug 2008 - 11:07:32 - TWiki Guest
 
Notice to NMPDR Users - The NMPDR BRC contract has ended and bacterial data from NMPDR has been transferred to PATRIC (http://www.patricbrc.org), a new consolidated BRC for all NIAID category A-C priority pathogenic bacteria. NMPDR was a collaboration among researchers from the Computation Institute of the University of Chicago, the Fellowship for Interpretation of Genomes (FIG), Argonne National Laboratory, and the National Center for Supercomputing Applications (NCSA) at the University of Illinois. NMPDR is funded by the National Institute of Allergy and Infectious Diseases, National Institutes of Health, Department of Health and Human Services, under Contract HHSN266200400042C. Banner images are copyright © Dennis Kunkel.