Crithidia: Difference between revisions
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| phylum = [[Euglenozoa]] |
| phylum = [[Euglenozoa]] |
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| classis = [[Kinetoplastida|Kinetoplastea]] |
| classis = [[Kinetoplastida|Kinetoplastea]] |
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| ordo = [[Trypanosomatid |
| ordo = [[Trypanosomatid]]a |
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| genus = '''''Crithidia''''' |
| genus = '''''Crithidia''''' |
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'''''Crithidia''''' are members of the [[Trypanosomatid|trypanosome]] [[protozoa]]. They are [[parasitism|parasites]] that exclusively parasitise [[arthropod]]s, mainly insects. They pass from host to host as cysts in infective [[faeces]] and typically, the parasites develop in the digestive tracts of insects and interact with the intestinal [[epithelium]] using their [[flagellum]]. They display very low host-specificity and a single parasite can infect a large range of invertebrate hosts.<ref>{{cite journal | author = Boulanger | year = 2001 | title = Immune response of Drosophila melanogaster to infection of the flagellate parasite Crithidia spp. | journal = Insect Biochemistry and Molecular Biology | volume = 31 | issue = 2 | pages = 129–37 | pmid = 11164335 | doi = 10.1016/S0965-1748(00)00096-5|display-authors=etal}}</ref> At different points in its life-cycle, it passes through [[amastigote]], [[promastigote]], and epimastigote phases; the last is particularly characteristic, and similar stages in other trypanosomes are often called crithidial. |
'''''Crithidia''''' are members of the [[Trypanosomatid|trypanosome]] [[protozoa]]. They are [[parasitism|parasites]] that exclusively parasitise [[arthropod]]s, mainly insects. They pass from host to host as cysts in infective [[faeces]] and typically, the parasites develop in the digestive tracts of insects and interact with the intestinal [[epithelium]] using their [[flagellum]]. They display very low host-specificity and a single parasite can infect a large range of invertebrate hosts.<ref>{{cite journal | author = Boulanger | year = 2001 | title = Immune response of Drosophila melanogaster to infection of the flagellate parasite Crithidia spp. | journal = Insect Biochemistry and Molecular Biology | volume = 31 | issue = 2 | pages = 129–37 | pmid = 11164335 | doi = 10.1016/S0965-1748(00)00096-5|display-authors=etal}}</ref> At different points in its life-cycle, it passes through [[amastigote]], [[promastigote]], and epimastigote phases; the last is particularly characteristic, and similar stages in other trypanosomes are often called crithidial. |
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''[[Crithidia bombi]]'' is perhaps the most well documented species and is the most prevalent parasite of [[bumblebee]]s, including common species like ''[[Bombus terrestris]]'', [[Bombus muscorum |
''[[Crithidia bombi]]'' is perhaps the most well documented species and is the most prevalent parasite of [[bumblebee]]s, including common species like ''[[Bombus terrestris]]'', ''[[Bombus muscorum]]'', and ''[[Bombus hortorum]]''.<ref>{{Cite journal|title = A Draft Genome of the Honey Bee Trypanosomatid Parasite Crithidia mellificae|url = http://dx.doi.org/10.1371/journal.pone.0095057|journal = PLoS ONE|date = 2014-04-17|pmc = 3990616|pmid = 24743507|pages = e95057|volume = 9|issue = 4|doi = 10.1371/journal.pone.0095057|first = Charles|last = Runckel|first2 = Joseph|last2 = DeRisi|first3 = Michelle L.|last3 = Flenniken}}</ref><ref name="Baer">{{cite journal | author = Baer, B. and P. Schmid-Hempel | year = 2001 | title = Unexpected consequences of polyandry for parasitism and fitness in the bumblebee, ''Bombus terrestris'' | journal = Evolution | volume = 55 | issue = 8 | pages = 1639–1643 }}</ref> The parasites negatively impact reproductive fitness of ''Bombus'' queens, as they affect their ovarian development as well as early colony establishment after the queens emerge from hibernation.<ref>{{Cite journal|title = Sex, horizontal transmission, and multiple hosts prevent local adaptation of Crithidia bombi, a parasite of bumblebees (Bombus spp.)|url = http://onlinelibrary.wiley.com/doi/10.1002/ece3.250/abstract|journal = Ecology and Evolution|date = 2012-05-01|issn = 2045-7758|pmc = 3399159|pmid = 22837838|pages = 930–940|volume = 2|issue = 5|doi = 10.1002/ece3.250|first = Silvio|last = Erler|first2 = Mario|last2 = Popp|first3 = Stephan|last3 = Wolf|first4 = H. Michael G.|last4 = Lattorff}}</ref> ''[[Crithidia mellificae]]'', is a parasite of the [[bee]]. Other species include ''[[Crithidia fasciculata|C. fasciculata]]'', ''[[Angomonas deanei|C. deanei]]'', ''[[Crithidia desouzai|C. desouzai]]'', ''[[Crithidia oncopemti|C. oncopelti]]'', ''[[Crithidia guilhermei|C. guilhermei]]'' and ''[[Crithidia luciliae|C. luciliae]]. C. deanei'' is atypical of the Crithidia genus, and it has been argued not a member of the Crithidia at all. It is not typical of trypanosomatids because of its unusual shape and it harbours [[endosymbiotic]] bacteria.<ref>{{cite journal | author = Camargo | year = 1992 | title = Ribosomal DNA restriction analysis and synthetic oligonucleotide probing in the identification of genera of lower trypanosomatids | journal = The Journal of Parasitology | volume = 78 | issue = 1 | pages = 40–8 | pmid = 1310733 | doi=10.2307/3283683|display-authors=etal}}</ref> ''C. luciliae'' is the substrate for the [[antinuclear antibody]] test used to diagnose lupus and other autoimmune disorders |
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These parasites may be at least partially responsible for declining wild bee populations. They cause the bees to lose their ability to distinguish between flowers that contain [[nectar]] and those that don't. They make many mistakes by visiting nectar scarce flowers and in so doing, slowly starve to death. Commercially bred bees are used in greenhouses to pollinate plants, for example tomatoes, and these bees typically harbor the parasite, while wild bees do not. It is believed that the commercial bees transmitted the parasite to wild populations in some cases. They escape from the greenhouses through vents; a simple mesh could help prevent this {{Citation |
These parasites may be at least partially responsible for declining wild bee populations. They cause the bees to lose their ability to distinguish between flowers that contain [[nectar]] and those that don't. They make many mistakes by visiting nectar scarce flowers and in so doing, slowly starve to death. Commercially bred bees are used in greenhouses to pollinate plants, for example tomatoes, and these bees typically harbor the parasite, while wild bees do not. It is believed that the commercial bees transmitted the parasite to wild populations in some cases. They escape from the greenhouses through vents; a simple mesh could help prevent this {{Citation needed|date=December 2014}}. |
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== Bibliography == |
== Bibliography == |
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{{reflist}} |
{{reflist}} |
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== Further |
== Further reading == |
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{{cite journal|last1=E Riddell|first1=Carolyn|last2=D Lobaton Garces|first2=Juan|last3=Adams|first3=Sally|title=Differential gene expression and alternative splicing in insect immune specificity|journal=BMC Genomics|date=27 November 2014|volume=15|doi=10.1186/1471-2164-15-1031|url=http://www.biomedcentral.com/1471-2164/15/1031|accessdate=11 February 2015}} {{open access}} |
{{cite journal|last1=E Riddell|first1=Carolyn|last2=D Lobaton Garces|first2=Juan|last3=Adams|first3=Sally|title=Differential gene expression and alternative splicing in insect immune specificity|journal=BMC Genomics|date=27 November 2014|volume=15|doi=10.1186/1471-2164-15-1031|url=http://www.biomedcentral.com/1471-2164/15/1031|accessdate=11 February 2015}} {{open access}} |
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{{cite journal|last1=Otterstatter|first1=Michael C.|last2=Thomson|first2=James D.|title=Does Pathogen Spillover from Commercially Reared Bumble Bees Threaten Wild Pollinators?|journal=PLoS ONE|date=23 July 2008|doi=10.1371/journal.pone.0002771|url=http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0002771|accessdate=13 February 2015}} {{open access}} |
{{cite journal|last1=Otterstatter|first1=Michael C.|last2=Thomson|first2=James D.|title=Does Pathogen Spillover from Commercially Reared Bumble Bees Threaten Wild Pollinators?|journal=PLoS ONE|date=23 July 2008|doi=10.1371/journal.pone.0002771|url=http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0002771|accessdate=13 February 2015}} {{open access}} |
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{{cite journal|last1=Daniel|first1=Cariveau|last2=Elijah|first2=Powell|last3=Hauke|first3=Koch|title=Variation in gut microbial communities and its association with pathogen infection in wild bumble bees (Bombus)|journal=The ISME journal|date=April 2014|volume=8|issue=12 |
{{cite journal|last1=Daniel|first1=Cariveau|last2=Elijah|first2=Powell|last3=Hauke|first3=Koch|title=Variation in gut microbial communities and its association with pathogen infection in wild bumble bees (Bombus)|journal=The ISME journal|date=April 2014|volume=8|issue=12|pages=2369–2379|accessdate=13 February 2015}} |
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== External links == |
== External links == |
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{{Commons category|Crithidia}} |
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{{eol|2910547}} |
{{eol|2910547}} |
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[[Category:Kinetoplastid]] |
[[Category:Kinetoplastid]] |
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Revision as of 07:13, 6 November 2015
| Crithidia | |
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| Scientific classification | |
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| Genus: | Crithidia
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Crithidia are members of the trypanosome protozoa. They are parasites that exclusively parasitise arthropods, mainly insects. They pass from host to host as cysts in infective faeces and typically, the parasites develop in the digestive tracts of insects and interact with the intestinal epithelium using their flagellum. They display very low host-specificity and a single parasite can infect a large range of invertebrate hosts.[1] At different points in its life-cycle, it passes through amastigote, promastigote, and epimastigote phases; the last is particularly characteristic, and similar stages in other trypanosomes are often called crithidial.
Crithidia bombi is perhaps the most well documented species and is the most prevalent parasite of bumblebees, including common species like Bombus terrestris, Bombus muscorum, and Bombus hortorum.[2][3] The parasites negatively impact reproductive fitness of Bombus queens, as they affect their ovarian development as well as early colony establishment after the queens emerge from hibernation.[4] Crithidia mellificae, is a parasite of the bee. Other species include C. fasciculata, C. deanei, C. desouzai, C. oncopelti, C. guilhermei and C. luciliae. C. deanei is atypical of the Crithidia genus, and it has been argued not a member of the Crithidia at all. It is not typical of trypanosomatids because of its unusual shape and it harbours endosymbiotic bacteria.[5] C. luciliae is the substrate for the antinuclear antibody test used to diagnose lupus and other autoimmune disorders
These parasites may be at least partially responsible for declining wild bee populations. They cause the bees to lose their ability to distinguish between flowers that contain nectar and those that don't. They make many mistakes by visiting nectar scarce flowers and in so doing, slowly starve to death. Commercially bred bees are used in greenhouses to pollinate plants, for example tomatoes, and these bees typically harbor the parasite, while wild bees do not. It is believed that the commercial bees transmitted the parasite to wild populations in some cases. They escape from the greenhouses through vents; a simple mesh could help prevent this [citation needed].
Bibliography
- ^ Boulanger; et al. (2001). "Immune response of Drosophila melanogaster to infection of the flagellate parasite Crithidia spp". Insect Biochemistry and Molecular Biology. 31 (2): 129–37. doi:10.1016/S0965-1748(00)00096-5. PMID 11164335.
- ^ Runckel, Charles; DeRisi, Joseph; Flenniken, Michelle L. (2014-04-17). "A Draft Genome of the Honey Bee Trypanosomatid Parasite Crithidia mellificae". PLoS ONE. 9 (4): e95057. doi:10.1371/journal.pone.0095057. PMC 3990616. PMID 24743507.
{{cite journal}}: CS1 maint: unflagged free DOI (link) - ^ Baer, B. and P. Schmid-Hempel (2001). "Unexpected consequences of polyandry for parasitism and fitness in the bumblebee, Bombus terrestris". Evolution. 55 (8): 1639–1643.
- ^ Erler, Silvio; Popp, Mario; Wolf, Stephan; Lattorff, H. Michael G. (2012-05-01). "Sex, horizontal transmission, and multiple hosts prevent local adaptation of Crithidia bombi, a parasite of bumblebees (Bombus spp.)". Ecology and Evolution. 2 (5): 930–940. doi:10.1002/ece3.250. ISSN 2045-7758. PMC 3399159. PMID 22837838.
- ^ Camargo; et al. (1992). "Ribosomal DNA restriction analysis and synthetic oligonucleotide probing in the identification of genera of lower trypanosomatids". The Journal of Parasitology. 78 (1): 40–8. doi:10.2307/3283683. PMID 1310733.
Further reading
E Riddell, Carolyn; D Lobaton Garces, Juan; Adams, Sally (27 November 2014). "Differential gene expression and alternative splicing in insect immune specificity". BMC Genomics. 15. doi:10.1186/1471-2164-15-1031. Retrieved 11 February 2015.{{cite journal}}: CS1 maint: unflagged free DOI (link) 
Otterstatter, Michael C.; Thomson, James D. (23 July 2008). "Does Pathogen Spillover from Commercially Reared Bumble Bees Threaten Wild Pollinators?". PLoS ONE. doi:10.1371/journal.pone.0002771. Retrieved 13 February 2015.{{cite journal}}: CS1 maint: unflagged free DOI (link)
Daniel, Cariveau; Elijah, Powell; Hauke, Koch (April 2014). "Variation in gut microbial communities and its association with pathogen infection in wild bumble bees (Bombus)". The ISME journal. 8 (12): 2369–2379. {{cite journal}}: |access-date= requires |url= (help)
External links
Wikimedia Commons has media related to Crithidia.