Listeria monocytogenes: Difference between revisions

Listeria
	; Scanning electron micrograph of Listeria monocytogenes.
Scientific classification
Kingdom:	Bacteria;
Division:	Firmicutes;
Class:	Bacilli;
Order:	Bacillales;
Family:	Listeriaceae;
Genus:	Listeria; Pirie 1940
Species
	L. fleischmannii; L. grayi; L. innocua; L. ivanovii; L. marthii; L. monocytogenes; L. rocourtiae; L. seeligeri; L. weihenstephanensis; L. welshimeri

	Listeriosis Microchapters
Home
Patient Information
Overview
Historical Perspective
Classification
Pathophysiology
Causes
Differentiating Listeriosis from other Diseases
Epidemiology and Demographics
Risk Factors
Natural History, Complications and Prognosis
Screening
Diagnosis
History and Symptoms
Physical Examination
Laboratory Findings
MRI
Other Diagnostic Studies
Treatment
Medical Therapy
Surgery
Primary Prevention
Secondary Prevention
Cost-Effectiveness of Therapy
Future or Investigational Therapies
Case Studies
Case #1
Listeria monocytogenes On the Web
Most recent articles
Most cited articles
Review articles
CME Programs
Powerpoint slides
Images
American Roentgen Ray Society Images of Listeria monocytogenes All Images X-rays Echo & Ultrasound CT Images MRI
Ongoing Trials at Clinical Trials.gov
US National Guidelines Clearinghouse
NICE Guidance
FDA on Listeria monocytogenes
CDC on Listeria monocytogenes
Listeria monocytogenes in the news
Blogs on Listeria monocytogenes
Directions to Hospitals Treating Listeriosis
Risk calculators and risk factors for Listeria monocytogenes

VisualWikitext

Latest revision as of 17:11, 25 January 2016

This page is about microbiologic aspects of the organism(s). For clinical aspects of the disease, see Listeriosis.

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: João André Alves Silva, M.D. [2]

Overview

Listeriosis is caused by the bacterium Listeria monocytogenes, a flagellated, catalase-positive, facultative intracellular, anaerobic, nonsporulating, Gram-positive bacillus. Listeria is commonly found in soil, water, vegetation and fecal material.^[1]

Cause

Listeriosis is caused by the bacterium Listeria spp.
Listeria monocytogenes is the most common species associated with development of listeriosis.
The genus Listeria contains ten species:

L. fleischmannii
L. grayi
L. innocua
L. ivanovii
L. marthii
L. monocytogenes
L. rocourtiae
L. seeligeri
L. weihenstephanensis
L. welshimeri

Of note, Listeria dinitrificans was previously thought to be part of the Listeria genus, but it has been reclassified into the new genus Jonesia.^[2]

Taxonomy

Bacteria; Firmicutes; Bacilli; Bacillales; Listeriaceae; Listeria; Listeria monocytogenes.

Microbiological Characteristics

Listeria monocytogenes is a flagellated, catalase-positive, facultative intracellular, anaerobic, nonsporulating, Gram-positive bacillus.

Natural Reservoir

In the environment, Listeria monocytogenes is commonly found in soil, water, vegetation and fecal material.
Animals may be asymptomatic carriers of Listeria.^[1]
L. monocytogenes has been associated with foods such as raw milk, pasteurized fluid milk, cheeses (particularly soft-ripened varieties), ice cream, raw vegetables, fermented raw-meat sausages, raw and cooked poultry, raw meats, and raw and smoked fish.^[3]
Listeria has the ability to grow at temperatures as low as 0°C, allows its multiplication in refrigerated foods. At refrigerated temperature such as 4°C, the amount of ferric iron in the environment promotes the growth of L. monocytogenes.^[4]

Gallery

Electron micrograph of a Listeria bacterium in tissue.Adapted from Public Health Image Library (PHIL), Centers for Disease Control and Prevention.^[5]

References

↑ ^1.0 ^1.1 "Risk assessment of Listeria monocytogenes in ready-to-eat foods" (PDF).
↑ M. D. Collins, S. Wallbanks, D. J. Lane, J. Shah, R. Nietupskin, J. Smida, M. Dorsch and E. Stackebrandt. Phylogenetic Analysis of the Genus Listeria Based on Reverse Transcriptase Sequencing of 16S rRNA. International Journal of Systematic and Evolutionary Microbiology. April 1991 vol. 41 no. 2 240–246
↑ Fleming, D. W., S. L. Cochi, K. L. MacDonald, J. Brondum, P. S. Hayes, B. D. Plikaytis, M. B. Holmes, A. Audurier, C. V. Broome, and A. L. Reingold. 1985. Pasteurized milk as a vehicle of infection in an outbreak of listeriosis. N. Engl. J. Med. 312:404-407.
↑ Dykes, G. A., Dworaczek (Kubo), M. 2002. Influence of interactions between temperature, ferric ammonium citrate and glycine betaine on the growth of Listeria monocytogenes in a defined medium. Lett Appl Microbiol. 35(6):538-42.
↑ ^5.0 ^5.1 "Public Health Image Library (PHIL), Centers for Disease Control and Prevention".

[WHO-1] 1.0 ^1.1 "Risk assessment of Listeria monocytogenes in ready-to-eat foods" (PDF).

[collins-2] M. D. Collins, S. Wallbanks, D. J. Lane, J. Shah, R. Nietupskin, J. Smida, M. Dorsch and E. Stackebrandt. Phylogenetic Analysis of the Genus Listeria Based on Reverse Transcriptase Sequencing of 16S rRNA. International Journal of Systematic and Evolutionary Microbiology. April 1991 vol. 41 no. 2 240–246

[Fleming_1985-3] Fleming, D. W., S. L. Cochi, K. L. MacDonald, J. Brondum, P. S. Hayes, B. D. Plikaytis, M. B. Holmes, A. Audurier, C. V. Broome, and A. L. Reingold. 1985. Pasteurized milk as a vehicle of infection in an outbreak of listeriosis. N. Engl. J. Med. 312:404-407.

[Dworaczek_Kubo_Dykes_2002-4] Dykes, G. A., Dworaczek (Kubo), M. 2002. Influence of interactions between temperature, ferric ammonium citrate and glycine betaine on the growth of Listeria monocytogenes in a defined medium. Lett Appl Microbiol. 35(6):538-42.

[PHIL-5] 5.0 ^5.1 "Public Health Image Library (PHIL), Centers for Disease Control and Prevention".

[1]

[2]

[3]

[4]

[5]

@@ Line 1: / Line 1: @@
-[[Image:LSA.jpg|thumb|200px|Colonies of typical ''Listeria monocytogenes'' as they appear when grown on Listeria selective [[agar]]]]
 __NOTOC__
-{{SI}}
+{{Listeriosis}}
-{{Main|Listeriosis}}
+{{Taxobox
+| color = lightgrey <!-- Please read [[WP:Taxobox usage#Color]] before making any changes to the taxobox color. -->
+| name = ''Listeria''
+| image =Listeria monocytogenes PHIL 2287 lores.jpg
+| image_width = 240px
+| image_caption = [[Scanning electron microscope|Scanning electron micrograph]] of ''Listeria monocytogenes''.
+| regnum = [[Bacterium|Bacteria]]
+| divisio = [[Firmicutes]]
+| classis = [[Bacilli]]
+| ordo = [[Bacillales]]
+| familia = [[Listeriaceae]]
+| genus = ''Listeria''
+| genus_authority = [[Harvey Pirie|Pirie]] 1940
+| subdivision_ranks = Species
+| subdivision =
+''[[Listeria fleischmannii|L. fleischmannii]]''<br />
+''[[Listeria grayi|L. grayi]]''<br />
+''[[Listeria innocua|L. innocua]]''<br />
+''[[Listeria ivanovii|L. ivanovii]]''<br />
+''[[Listeria marthii|L. marthii]]''<br />
+''[[Listeria monocytogenes|L. monocytogenes]]''<br />
+''[[Listeria rocourtiae|L. rocourtiae]]''<br />
+''[[Listeria seeligeri|L. seeligeri]]''<br />
+''[[Listeria weihenstephanensis|L. weihenstephanensis]]''<br />
+''[[Listeria welshimeri|L. welshimeri]]''
+}}
+{{About0|Listeriosis}}
 {{CMG}}; {{AE}} {{JS}}
 ==Overview==
-'''''Listeria monocytogenes''''' is a [[Gram-positive]] [[bacterium]], in the division [[Firmicutes]], named for [[Joseph Lister]]. [[Motility|Motile]] via [[flagella]], ''L. monocytogenes'' can move within [[Eukaryote|eukaryotic]] cells by explosive [[polymerization]] of [[actin]] filaments (known as ''comet tails'' or ''actin rockets''). The name ''monocitogenes'' derives from the strong [[monocytic]] activity this organism produces in rabbits, which however does not happen in humans. Despite the name, more that half the patients present with increased levels of [[neutrophils]] in [[CSF]].<ref>{{Cite book  | last1 = Mandell | first1 = Gerald L. | last2 = Bennett | first2 = John E. (John Eugene) | last3 = Dolin | first3 = Raphael. | title = Mandell, Douglas, and Bennett's principles and practice of infectious disease | date = 2010 | publisher = Churchill Livingstone/Elsevier | location = Philadelphia, PA | isbn = 0-443-06839-9 | pages =  }}</ref>
+Listeriosis is caused by the bacterium ''Listeria monocytogenes'', a flagellated, [[catalase-positive]], facultative [[intracellular]], [[anaerobe|anaerobic]], [[spore|nonsporulating]], [[Gram-positive]] [[bacillus]]. ''Listeria'' is commonly found in soil, water, vegetation and fecal material.<ref name=WHO>{{cite web | title = Risk assessment of Listeria monocytogenes in ready-to-eat foods | url = http://whqlibdoc.who.int/publications/2004/9241562625_part1.pdf }}</ref>
-Studies suggest that up to 10% of human [[gastrointestinal tract]]s may be colonized by ''L. monocytogenes''.
-==Taxonomy==
+==Cause==
-[[Bacteria]]; [[Firmicutes]]; [[Bacilli]]; [[Bacillales]]; [[Listeriaceae]]; [[Listeria]]; [[Listeria monocytogenes]]
+*Listeriosis is  caused by the bacterium ''Listeria spp''.
+*''Listeria monocytogenes'' is the most common species associated with development of listeriosis.
+*The genus ''Listeria'' contains ten species:
+:*''L. fleischmannii''
+:*''L. grayi''
+:*''L. innocua''
+:*''L. ivanovii''
+:*''L. marthii''
+:*''L. monocytogenes''
+:*''L. rocourtiae''
+:*''L. seeligeri''
+:*''L. weihenstephanensis''
+:*''L. welshimeri''
-==Biology==
+*Of note, ''Listeria dinitrificans'' was previously thought to be part of the ''Listeria'' genus, but it has been reclassified into the new genus ''[[Jonesia]]''.<ref name=collins>M. D. Collins, S. Wallbanks, D. J. Lane, J. Shah, R. Nietupskin, J. Smida, M. Dorsch and E. Stackebrandt. Phylogenetic Analysis of the Genus ''Listeria'' Based on Reverse Transcriptase Sequencing of 16S rRNA. International Journal of Systematic and Evolutionary Microbiology. April 1991 vol. 41 no. 2 240–246</ref>
-''Listeria monocytogenes'' is a [[Gram-positive]], facultative [[anaerobe]], [[spore|nonsporulating]] [[bacillus]] with polar [[flagella]]e. It is a [[catalase]]-positive organism and exhibits motility, more specifically '''tumbling motility'''. Listeria produces acid but not gas in a variety of carbohydrates.<ref>Chapter 13. Non-Spore-Forming Gram-Positive Bacilli: Corynebacterium, Propionibacterium, Listeria, Erysipelothrix, Actinomycetes, & Related Pathogens ,Jawetz, Melnick, & Adelberg's Medical Microbiology, 24th Edition ,The McGraw-Hill Companies</ref> It has the ability to grow at temperatures as low as 0°C, which allow it to survive in a diverse array of environments such as soil, water, food products, and host cells.
-''Listeria'' uses the [[cellular]] machinery to move inside the host [[cell]]. It induces directed polymerization of [[actin]] by the ActA [[transmembrane protein]], thus pushing the bacterial cell inside the host cell.
+==Taxonomy==
+[[Bacteria]]; [[Firmicutes]]; [[Bacilli]]; [[Bacillales]]; [[Listeriaceae]]; [[Listeria]]; [[Listeria monocytogenes]].
-===Infectious Cycle===
+==Microbiological Characteristics==
-The primary site of [[infection]] is the [[intestinal epithelium]] where the [[bacteria]] invade non-phagocytic cells via the "zipper" mechanism:
+*''Listeria monocytogenes'' is a flagellated, [[catalase-positive]], facultative [[intracellular]], [[anaerobe|anaerobic]], [[spore|nonsporulating]], [[Gram-positive]] [[bacillus]].
-* Uptake is stimulated by the binding of listerial internalins (Inl) to host [[cell]] [[adhesion]] factors such as E-[[cadherin]] or Met.
-* This binding activates certain Rho-GTPases which subsequently bind and stabilize [[Wiskott-Aldrich syndrome protein]] (WASp).
-* WASp can then bind the [[Arp2/3 complex]] and serve as an [[actin]] nucleation point.
-* Subsequent [[actin]] polymerization extends the [[cell membrane]] around the [[bacterium]], eventually engulfing it.
-* The net effect of internalin binding is to exploit the junction forming-apparatus of the host into internalizing the [[bacterium]].
-''L. monocytogenes'' can also invade [[phagocytic cells]] (e.g. [[macrophages]]) but only requires internalins for invasion of non-[[phagocytic]] cells.
+==Natural Reservoir==
+*In the environment, ''Listeria monocytogenes'' is commonly found in soil, water, vegetation and fecal material.
+*Animals may be asymptomatic carriers of ''Listeria''.<ref name=WHO>{{cite web | title = Risk assessment of Listeria monocytogenes in ready-to-eat foods | url = http://whqlibdoc.who.int/publications/2004/9241562625_part1.pdf }}</ref>
+*''L. monocytogenes'' has been associated with foods such as raw [[milk]], pasteurized fluid milk, [[cheese]]s (particularly soft-ripened varieties), [[ice cream]], raw [[vegetables]], fermented raw-meat sausages, raw and cooked [[poultry]], raw meats, and raw and smoked [[fish]].<ref name=Fleming_1985>Fleming, D. W., S. L. Cochi, K. L. MacDonald, J. Brondum, P. S. Hayes, B. D. Plikaytis, M. B. Holmes, A. Audurier, C. V. Broome, and A. L. Reingold. 1985. Pasteurized milk as a vehicle of infection in an outbreak of listeriosis. N. Engl. J. Med. 312:404-407.</ref>
+*''Listeria'' has the ability to grow at temperatures as low as 0°C, allows its multiplication in refrigerated foods. At refrigerated temperature such as 4°C, the amount of ferric iron in the environment promotes the growth of ''L. monocytogenes''.<ref name=Dworaczek_Kubo_Dykes_2002>Dykes, G. A., Dworaczek (Kubo), M. 2002. Influence of interactions between temperature, ferric ammonium citrate and glycine betaine on the growth of ''Listeria monocytogenes'' in a defined medium. Lett Appl Microbiol. 35(6):538-42.</ref>
-* Following internalisation, the [[bacterium]] must escape from the [[vacuole]]/[[phagosome]] before fusion with a [[lysosome]] can occur. Two main [[virulence factors]] allow the [[bacterium]] to escape:
+==Gallery==
-:* [[Listeriolysin O]] (LLO - encoded by ''hly'')
+[[Image:Listeria2.jpg|thumb|none| Electron micrograph of a Listeria bacterium in tissue.<SMALL><SMALL>''[http://phil.cdc.gov/phil/  Adapted from Public Health Image Library (PHIL), Centers for Disease Control and Prevention.]''<ref name="PHIL">{{Cite web | title = Public Health Image Library (PHIL), Centers for Disease Control and Prevention | url = http://phil.cdc.gov/phil/}}</ref></SMALL></SMALL>]]
-:* [[Phospholipase C]] B (''plc''B).
-* Secretion of LLO and PlcB disrupts the [[vacuole|vacuolar]] membrane and allows the [[bacterium]] to escape into the [[cytoplasm]] where it may [[proliferate]].
-* Once in the [[cytoplasm]], ''L. monocytogenes'' exploits host's [[actin]] for the second time:
-:* ActA [[proteins]] associated with the old [[bacterial]] cell pole, are capable of binding the [[Arp2/3 complex]] and thus induce [[actin]] nucleation at a specific area of the [[bacterial]] cell surface (being a [[bacilli]], ''L. monocytogenes'' septates in the middle of the [[cell]] and thus has "new pole" and another "old pole").
-:* [[Actin]] polymerization then propels the [[bacterium]] unidirectionally into the host [[cell membrane]]. The protrusion which is formed, may then be internalised by a neighbouring [[cell]], forming a double-membrane [[vacuole]] from which the [[bacterium]] must escape using LLO and PlcB.
-==Tropism==
+[[Image:Listeria3.jpg|thumb|none| Electron micrograph of a Listeria bacterium in tissue.<SMALL><SMALL>''[http://phil.cdc.gov/phil/  Adapted from Public Health Image Library (PHIL), Centers for Disease Control and Prevention.]''<ref name="PHIL">{{Cite web | title = Public Health Image Library (PHIL), Centers for Disease Control and Prevention | url = http://phil.cdc.gov/phil/}}</ref></SMALL></SMALL>]]
-==Natural Reservoir==
-* ''L. monocytogenes'' has been associated with such foods as raw [[milk]], pasteurized fluid milk<ref name=Fleming_1985>Fleming, D. W., S. L. Cochi, K. L. MacDonald, J. Brondum, P. S. Hayes, B. D. Plikaytis, M. B. Holmes, A. Audurier, C. V. Broome, and A. L. Reingold. 1985. Pasteurized milk as a vehicle of infection in an outbreak of listeriosis. N. Engl. J. Med. 312:404-407.</ref>, [[cheese]]s (particularly soft-ripened varieties), [[ice cream]], raw [[vegetables]], fermented raw-meat sausages, raw and cooked [[poultry]], raw meats (of all types), and raw and smoked [[fish]].
-* Its ability to grow at temperatures as low as 0°C permits multiplication in refrigerated foods.  In refrigeration temperature such as 4°C the amount of ferric iron promotes the growth of ''L. monocytogenes''.<ref name=Dworaczek_Kubo_Dykes_2002>Dykes, G. A., Dworaczek (Kubo), M. 2002. Influence of interactions between temperature, ferric ammonium citrate and glycine betaine on the growth of ''Listeria monocytogenes'' in a defined medium. Lett Appl Microbiol. 35(6):538-42.</ref>
 ==References==
 {{Reflist|2}}
-==External links==
-* [http://vm.cfsan.fda.gov/~mow/chap6.html/ U.S. Food and Drug Administration. Foodborne Pathogenic Microorganisms and Natural Toxins Handbook:  Listeria monocytogenes]
-[[Category:Listeriaceae]]
-[[Category:Foodborne illnesses]]
-[[es:Listeria monocytogenes]]
-[[fr:Listeria monocytogenes]]
-[[pt:Listeria monocytogenes]]
-[[ja:リステリア]]
-{{WH}}
-{{WS}}