Chlamydophila psittaci: Difference between revisions

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'''For the WikiDoc page for this topic, click [[Psittacosis|here]]'''
'''For the WikiDoc page for this topic, click [[Psittacosis|here]]'''


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==Overview==
==Overview==
Psittacosis is caused by the organism Chlamydia psittaci. [[Chlamydia (bacterium)|Chlamydia]] is understood to be a [[Gram-negative]] [[bacterium]] belonging to the genus [[Chlamydia]] or [[Chlamydophila]] in the family of [[Chlamydiaceae]]  together with  [[Parachlamydiaceae]], [[Waddliaceae]] and [[Simkaniaceae]] in the [[Order (biology)|order]] [[Chlamydiales]], [[Class (biology)|class]] and [[phylum]] [[Chlamydiae]]. [[Chlamydiales]] are [[obligate]] intracellular infectious agents in [[eukaryotic]] cells characterized by a unique developmental replication cycle.<ref name="pmid229510">{{cite journal| author=de Rossi G, Focacci C| title=Early detection of craniosynostosis by 99mTc-pyrophosphate bone scanning. | journal=Radiol Diagn (Berl) | year= 1979 | volume= 20 | issue= 3 | pages= 405-9 | pmid=229510 | doi= | pmc= | url=https://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=229510  }} </ref>
Psittacosis is caused by the [[organism]] [[Chlamydia|''Chlamydia psittaci''.]] [[Chlamydia (bacterium)|Chlamydia]] is understood to be a [[Gram-negative]] [[bacterium]] belonging to the [[genus]] [[Chlamydia]] or [[Chlamydophila]] in the [[family]] of [[Chlamydiaceae|''Chlamydiaceae'']]  together with  [[Parachlamydiaceae|''Parachlamydiaceae'']], [[Waddliaceae|''Waddliaceae'']] and [[Simkaniaceae|''Simkaniaceae'']] in the [[Order (biology)|order]] [[Chlamydiales|''Chlamydiales'']], [[Class (biology)|class]] and [[phylum]] [[Chlamydiae|''Chlamydiae'']]. [[Chlamydiales]] are [[obligate]] intracellular infectious agents in [[eukaryotic]] cells characterized by a unique developmental replication cycle.<ref name="pmid229510">{{cite journal| author=de Rossi G, Focacci C| title=Early detection of craniosynostosis by 99mTc-pyrophosphate bone scanning. | journal=Radiol Diagn (Berl) | year= 1979 | volume= 20 | issue= 3 | pages= 405-9 | pmid=229510 | doi= | pmc= | url=https://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=229510  }} </ref>


==Causes==
==Causes==
Birds are the major [[zoonotic]] reservoir. Despite its name, C. psittaci infection has been documented in 467 species from 30 bird orders, from psittaformes to ostriches to penguins have all been found to be associated with the development of psittacosis<ref name="BeeckmanVanrompay2009">{{cite journal|last1=Beeckman|first1=D.S.A.|last2=Vanrompay|first2=D.C.G.|title=Zoonotic Chlamydophila psittaci infections from a clinical perspective|journal=Clinical Microbiology and Infection|volume=15|issue=1|year=2009|pages=11–17|issn=1198743X|doi=10.1111/j.1469-0691.2008.02669.x}}</ref>. Bird handlers and those who keep birds as pets have a higher prevalence of the disease.  
* Birds are the major [[zoonotic]] reservoir. Despite its name, ''C. psittaci'' infection has been documented in 467 species from 30 bird [[Order (biology)|orders]], from psittaformes to ostriches to penguins have all been found to be associated with the development of [[psittacosis]].<ref name="BeeckmanVanrompay2009">{{cite journal|last1=Beeckman|first1=D.S.A.|last2=Vanrompay|first2=D.C.G.|title=Zoonotic Chlamydophila psittaci infections from a clinical perspective|journal=Clinical Microbiology and Infection|volume=15|issue=1|year=2009|pages=11–17|issn=1198743X|doi=10.1111/j.1469-0691.2008.02669.x}}</ref>
[[C. psittaci]] may be classified into eight [[serovars]] according to variation in the major outer membrane protein (MOMP): serovar A to F, WC and M56.<ref name="pmid9765811">{{cite journal| author=Vanrompay D, Butaye P, Sayada C, Ducatelle R, Haesebrouck F| title=Characterization of avian Chlamydia psittaci strains using omp1 restriction mapping and serovar-specific monoclonal antibodies. | journal=Res Microbiol | year= 1997 | volume= 148 | issue= 4 | pages= 327-33 | pmid=9765811 | doi=10.1016/S0923-2508(97)81588-4 | pmc= | url=https://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=9765811  }} </ref>. With recent advances in molecular diagnostic techniques,
* Bird handlers and those who keep birds as pets have a higher [[prevalence]] of the [[disease]].
 
* [[C. psittaci|''C. psittaci'']] may be classified into eight [[serovars]] according to variation in the [[Major Basic Protein|major outer membrane protein]] (MOMP): [[serovar]] A to F, WC and M56.<ref name="pmid9765811">{{cite journal| author=Vanrompay D, Butaye P, Sayada C, Ducatelle R, Haesebrouck F| title=Characterization of avian Chlamydia psittaci strains using omp1 restriction mapping and serovar-specific monoclonal antibodies. | journal=Res Microbiol | year= 1997 | volume= 148 | issue= 4 | pages= 327-33 | pmid=9765811 | doi=10.1016/S0923-2508(97)81588-4 | pmc= | url=https://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=9765811  }} </ref>  
[[C. psittaci]] can be further classified into 20 [[Genotype|serovars]]. This  was proposed recently on the basis of both ompA sequence analysis and multiple loci variable number of tandem repeats analysis (MLVA),
'''Table 1: Classification of ''Chlamydophila psittaci into 8 serovars'''''<ref name="pmid1153750">{{cite journal| author=Balter S, Janower ML| title=The use of photochromic eyeglasses by radiologists. | journal=Radiology | year= 1975 | volume= 116 | issue= 02 | pages= 450 | pmid=1153750 | doi=10.1148/116.2.450 | pmc= | url=https://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=1153750  }} </ref>
 
'''Table 1: Classification of ''Chlamydophila psittaci into 8 serovars.'''''<ref name="pmid1153750">{{cite journal| author=Balter S, Janower ML| title=The use of photochromic eyeglasses by radiologists. | journal=Radiology | year= 1975 | volume= 116 | issue= 02 | pages= 450 | pmid=1153750 | doi=10.1148/116.2.450 | pmc= | url=https://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=1153750  }} </ref>
{| class="wikitable"
{| class="wikitable"
!Serovar
!Serovar
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|A
|A
|A
|A
|Psittaformes:
|Psittaformes
* Budgerigars
* Budgerigars
* Cockatiels
* Cockatiels
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|B
|B
|B
|B
|Columbiformes:
|Columbiformes
* Pigeons
* Pigeons
* Doves
* Doves
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|C
|C
|C
|C
|Anseriformes:
|Anseriformes  
* Ducks
* Ducks
* Geese
* Geese
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|D
|D
|D
|D
|Galliformes:
|Galliformes  
* Turkeys
* Turkeys
* Pheasants
* Pheasants
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|E
|E
|E
|E
|Struthioniformes:
|Struthioniformes  
* Ostriches
* Ostriches
* Pigeons
* Pigeons

Latest revision as of 14:32, 27 July 2017


For the WikiDoc page for this topic, click here

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor-In-Chief: Mohammed A. Sbeih, M.D. [2]Omodamola Aje B.Sc, M.D. [3]

Chlamydophila psittaci
Direct fluorescent antibody stain of a mouse brain impression smear showing C. psittaci.
Direct fluorescent antibody stain of a mouse brain impression smear showing C. psittaci.
Scientific classification
Kingdom: Bacteria
Phylum: Chlamydiae
Order: Chlamydiales
Family: Chlamydiaceae
Genus: Chlamydophila
Species: C. psittaci

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Overview

Psittacosis is caused by the organism Chlamydia psittaci. Chlamydia is understood to be a Gram-negative bacterium belonging to the genus Chlamydia or Chlamydophila in the family of Chlamydiaceae together with Parachlamydiaceae, Waddliaceae and Simkaniaceae in the order Chlamydiales, class and phylum Chlamydiae. Chlamydiales are obligate intracellular infectious agents in eukaryotic cells characterized by a unique developmental replication cycle.[1]

Causes

Table 1: Classification of Chlamydophila psittaci into 8 serovars[4]

Serovar Genotype Predominant host order Human infection documented
A A Psittaformes
  • Budgerigars
  • Cockatiels
  • Parakeets
Yes
B B Columbiformes
  • Pigeons
  • Doves
Yes
C C Anseriformes
  • Ducks
  • Geese
  • Swans
Yes
D D Galliformes
  • Turkeys
  • Pheasants
  • Chickens
Yes
E E Struthioniformes
  • Ostriches
  • Pigeons
  • Duck
Yes
F F Isolated from single parakeet and turkey only Yes
WC G Cattle No
M56 H Rodents No
E/B Ducks Yes

References

  1. de Rossi G, Focacci C (1979). "Early detection of craniosynostosis by 99mTc-pyrophosphate bone scanning". Radiol Diagn (Berl). 20 (3): 405–9. PMID 229510.
  2. Beeckman, D.S.A.; Vanrompay, D.C.G. (2009). "Zoonotic Chlamydophila psittaci infections from a clinical perspective". Clinical Microbiology and Infection. 15 (1): 11–17. doi:10.1111/j.1469-0691.2008.02669.x. ISSN 1198-743X.
  3. Vanrompay D, Butaye P, Sayada C, Ducatelle R, Haesebrouck F (1997). "Characterization of avian Chlamydia psittaci strains using omp1 restriction mapping and serovar-specific monoclonal antibodies". Res Microbiol. 148 (4): 327–33. doi:10.1016/S0923-2508(97)81588-4. PMID 9765811.
  4. Balter S, Janower ML (1975). "The use of photochromic eyeglasses by radiologists". Radiology. 116 (02): 450. doi:10.1148/116.2.450. PMID 1153750.


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