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

©2017 Google

Bad News Hummus Lovers: 3 Brands Have Recalled Been Due To Listeria - Refinery29


Refinery29

Bad News Hummus Lovers: 3 Brands Have Recalled Been Due To Listeria
Refinery29
If you love hummus, and especially hummus with pine nuts, then it's time to check your fridge. The Food and Drug Administration announced Monday that they have recalled three different brands of hummus that use a pine nut topping over listeria concerns.
Hummus Topped With Pine Nuts Recalled Over Listeria FearsFortune
Hummus recalled over listeria concernsFOX31 Denver
Hummus with pine nuts recalled over possible listeria contaminationCNN
The Courier-Journal -whnt.com -FDA -Centers for Disease Control and Prevention
all 76 news articles »

Hummus sold at major retailers recalled for listeria - Raw Story


Raw Story

Hummus sold at major retailers recalled for listeria
Raw Story
Three brands of hummus produced by refrigerated foods manufacturer House of Thaller have been recalled by the FDA for possibly containing listeria. The brands in question Fresh Foods Market, Lantana and Marketside are sold across the United ...
Recalls, Market Withdrawals, & Safety Alerts > House of Thaller Recalls Selected Pine Nut Hummus Products Because ...FDA

all 76 news articles »

At least 14 food companies recall products at risk of listeria poisoning - Washington Times


Washington Times

At least 14 food companies recall products at risk of listeria poisoning
Washington Times
Last week, recalls were issued for an animal food product, a chickpea snack, and almond and cashew butter because the food companies had discovered listeria somewhere along the production line. It was not known if the products contained listeria, but ...
Hummus recalled over Listeria concerns - WFMJ.com News weather sports for Youngstown-Warren OhioWFMJ
Harris Teeter recalls Fresh Foods Market hummus due to listeria ...WRAL.com
Harris Teeter recalls hummus over possible listeria contaminationmyfox8.com
WIFR -WSET -Barfblog (blog)
all 14 news articles »

San Antonio-Based Wildly LLC, Trader Joe's, Recall Granola Over Listeria Fears - Patch.com


Patch.com

San Antonio-Based Wildly LLC, Trader Joe's, Recall Granola Over Listeria Fears
Patch.com
AUSTIN, TX San Antonio-based granola maker Wildly LLC recalled its products along with those sold under the Trader Joe's brand over potential Listeria contamination, according to regulators. The move comes after both companies were notified by a ...

3M Listeria Assay Approved by Health Canada - GenomeWeb


3M Listeria Assay Approved by Health Canada
GenomeWeb
NEW YORK (GenomeWeb) 3M said today that Health Canada has approved its second-generation molecular detection assay for Listeria testing in food and environmental testing. Like all of 3M's molecular detection assays, the Listeria test uses isothermal ...

Biofilms with Listeria pose persistent threat in food production - Food Safety News


Food Safety News

Biofilms with Listeria pose persistent threat in food production
Food Safety News
Both of those companies have had close encounters with Listeria, which ongoing research is showing can be even tougher to kill than previously thought. When the microorganism has time to set up housekeeping in a biofilm in crevices on equipment or ...

Listeria recall: Harris Teeter recalls pine nut hummus News ... - News & Observer


News & Observer

A small company has a big listeria problem - Miami Herald


A small company has a big listeria problem
Miami Herald
Hudson Valley Farms is a food company claiming 10 or fewer employees. They don't even have a working website. How big a deal could a listeria problem there be? Problem enough to be the source for at least three of the seven listeria-related national ...

Hummus sold at Target, Walmart recalled due to possible listeria ... - MassLive.com


MassLive.com

Hummus sold at Target, Walmart recalled due to possible listeria ...
MassLive.com
Several brands of hummus sold at different stores across the country have been recalled because of potential listeria contamination.

and more »

Hummus recalled over possible listeria contamination - FOX 5 Atlanta


Hummus recalled over possible listeria contamination
FOX 5 Atlanta
FOX NEWS - A Tennessee company has issued a voluntary recall for select hummus products sold nationwide and in Canada over concerns of possible listeria contamination. House of Thaller said the affected products involve 10 ounce packages of ...

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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.