From Wikipedia, the free encyclopedia
Order of parasites in phylum Apicomplexa, vertebrate hosts, tick and leech vectors
Piroplasmida phylogeny (mtDNA)
[2]
Piroplasmida is an
order of
parasites in the
phylum
Apicomplexa .
[3]
[4] They divide by
binary fission and as
sporozoan parasites they possess
sexual and
asexual phases (sexual reproduction occurs in the tick gut
[5] ). They include the
tick parasites
Babesia and
Theileria .
[6]
[7]
Description
They are minute rounded or
pyriform parasites found within erythrocytes, or other circulating or endothelial cells of vertebrates, where they reproduce by
merogony . The
trophozoite stage is separated from erythrocyte by a single membrane. This distinguishes them from other blood parasites that usually have at least two membranes.
An
apical complex with a polar ring and rhopteries occurs, but without a
conoid and usually without associated pellicular microtubules. They lack
flagella and do not form either
oocysts or spores.
The known vectors are
ticks or
leeches in which they undergo
sporogony ; sexual reproduction probably occurs in the vector.
See also
References
^ Manwell RD (1964). "The Genus Dactylosoma". The Journal of Protozoology . 11 (4): 526–530.
doi :
10.1111/j.1550-7408.1964.tb01792.x .
PMID
14231179 .
^ Schreeg, ME; Marr, HS; Tarigo, JL; Cohn, LA; Bird, DM; Scholl, EH; Levy, MG; Wiegmann, BM; Birkenheuer, AJ (2016).
"Mitochondrial Genome Sequences and Structures Aid in the Resolution of Piroplasmida phylogeny" . PLOS ONE . 11 (11): e0165702.
Bibcode :
2016PLoSO..1165702S .
doi :
10.1371/journal.pone.0165702 .
PMC
5104439 .
PMID
27832128 .
^
"Definition: piroplasmida from Online Medical Dictionary" . ncl.ac.uk . Retrieved 1 January 2019 .
^
"PIROPLASMIDA; Page 1 of the families of the order; Piroplasmida" . British Towns and Villages . Retrieved 1 January 2019 .
^ Rudzinska MA, Spielman A, Lewengrub S, Trager W, Piesman J (May 1983).
"Sexuality in piroplasms as revealed by electron microscopy in Babesia microti " . Proc. Natl. Acad. Sci. U.S.A . 80 (10): 2966–70.
Bibcode :
1983PNAS...80.2966R .
doi :
10.1073/pnas.80.10.2966 .
PMC
393954 .
PMID
6574467 .
^
"Definition: Theileriidae from Online Medical Dictionary" . ncl.ac.uk . Retrieved 1 January 2019 .
^
"Theleriosis: The causal organism and life cycle" . animaldiseases.org . Archived from
the original on 18 November 2007. Retrieved 1 January 2019 .
Archigregarinorida
Eugregarinorida
Aseptatorina
Blastogregarinorina
Septatorina
Fusionicae (
Fusionidae )
Gregarinicae (
Cephaloidophoridae ,
Cephalolobidae ,
Didymophoridae ,
Gregarinidae ,
Hirmocystidae ,
Metameridae ,
Uradiophoridae )
Porosporicae (
Porosporidae )
Stenophoricae (
Acutidae ,
Amphiplatysporidae ,
Brustiophoridae ,
Cnemidosporidae ,
Dactylophoridae ,
Leidyanidae ,
Monoductidae ,
Monoicidae ,
Sphaerocystidae ,
Stenophoridae ,
Trichorhynchidae )
Stylocephaloidea (
Actinocephalidae ,
Stylocephalidae )
Blabericolidae
Neogregarinorida