Difference between revisions of "Bacteria"
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==Actinobacteria== | ==Actinobacteria== | ||
* | ===General=== | ||
*A very large group of bacteria. | |||
It includes:<ref name=pmid17804669>{{Cite journal | last1 = Ventura | first1 = M. | last2 = Canchaya | first2 = C. | last3 = Tauch | first3 = A. | last4 = Chandra | first4 = G. | last5 = Fitzgerald | first5 = GF. | last6 = Chater | first6 = KF. | last7 = van Sinderen | first7 = D. | title = Genomics of Actinobacteria: tracing the evolutionary history of an ancient phylum. | journal = Microbiol Mol Biol Rev | volume = 71 | issue = 3 | pages = 495-548 | month = Sep | year = 2007 | doi = 10.1128/MMBR.00005-07 | PMID = 17804669 | PMC = 2168647}}</ref> | |||
*Actinomycetes. | |||
*Corynebacterium. | |||
*Mycobacterium. | |||
*Nocardia. | |||
*Streptomyces. | |||
==Actinomycetes== | |||
===General=== | ===General=== | ||
*IUD needs to be removed if found on a pap test<ref name=Ref_WMSP446>{{Ref WMSP|446}}</ref> - see ''[[Gynecologic cytopathology#Actinomycetes|gynecologic cytopathology]]''. | *IUD needs to be removed if found on a pap test<ref name=Ref_WMSP446>{{Ref WMSP|446}}</ref> - see ''[[Gynecologic cytopathology#Actinomycetes|gynecologic cytopathology]]''. | ||
*Gram-positive branching rods. | *Gram-positive branching rods. | ||
*Common in the tonsils. | *Common in the tonsils. | ||
*Part of the large [[Actinobacteria]] group.<ref name=pmid17804669>{{Cite journal | last1 = Ventura | first1 = M. | last2 = Canchaya | first2 = C. | last3 = Tauch | first3 = A. | last4 = Chandra | first4 = G. | last5 = Fitzgerald | first5 = GF. | last6 = Chater | first6 = KF. | last7 = van Sinderen | first7 = D. | title = Genomics of Actinobacteria: tracing the evolutionary history of an ancient phylum. | journal = Microbiol Mol Biol Rev | volume = 71 | issue = 3 | pages = 495-548 | month = Sep | year = 2007 | doi = 10.1128/MMBR.00005-07 | PMID = 17804669 | PMC = 2168647}}</ref> | |||
Notes: | Notes: | ||
Revision as of 16:41, 15 September 2011
Bacteria are single celled microorganisms, without a nucleus (prokaryotes), that can cause lots of morbidity and mortality. They are not infrequently seen by pathologists.
Actinobacteria
General
- A very large group of bacteria.
It includes:[1]
- Actinomycetes.
- Corynebacterium.
- Mycobacterium.
- Nocardia.
- Streptomyces.
Actinomycetes
General
- IUD needs to be removed if found on a pap test[2] - see gynecologic cytopathology.
- Gram-positive branching rods.
- Common in the tonsils.
- Part of the large Actinobacteria group.[1]
Notes:
- Mycete = fungus; these organisms have a fungus-like appearance.
Gross
- Yellow granules.[3]
Microscopic
- Branching rods.
- Typically form pink/purple granules ("sulfur granule") that is surrounded by inflammatory cells (lymphocytes or neutrophils).
DDx:
- Nocardia.
Notes:
- Sulfur granule may be seen grossly - yellow.[3]
Images:
Stains
- Gram +ve.
- AFB -ve.
- Nocardia +ve.
Helicobacter pylori
- See Stomach.
Clostridium difficile
- Commonly C. difficile.
General
- Gram positive bacillus.
One virulent strain is:[5][6] BI/NAP1.
- Deletion of tcdC locus.
- Resistant to fluoroquinolones (gatifloxacin and moxifloxacin).
See also
References
- ↑ 1.0 1.1 Ventura, M.; Canchaya, C.; Tauch, A.; Chandra, G.; Fitzgerald, GF.; Chater, KF.; van Sinderen, D. (Sep 2007). "Genomics of Actinobacteria: tracing the evolutionary history of an ancient phylum.". Microbiol Mol Biol Rev 71 (3): 495-548. doi:10.1128/MMBR.00005-07. PMC 2168647. PMID 17804669. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2168647/.
- ↑ Humphrey, Peter A; Dehner, Louis P; Pfeifer, John D (2008). The Washington Manual of Surgical Pathology (1st ed.). Lippincott Williams & Wilkins. pp. 446. ISBN 978-0781765275.
- ↑ 3.0 3.1 3.2 URL: http://pathmicro.med.sc.edu/mycology/mycology-2.htm. Accessed on: 14 September 2011.
- ↑ URL: http://pathology.class.kmu.edu.tw/ch05/Slide42.htm . Accessed on: 14 September 2011.
- ↑ URL: http://www.medpagetoday.com/InfectiousDisease/PublicHealth/2254. Accessed on: 15 August 2011.
- ↑ McDonald, LC.; Killgore, GE.; Thompson, A.; Owens, RC.; Kazakova, SV.; Sambol, SP.; Johnson, S.; Gerding, DN. (Dec 2005). "An epidemic, toxin gene-variant strain of Clostridium difficile.". N Engl J Med 353 (23): 2433-41. doi:10.1056/NEJMoa051590. PMID 16322603.