Cryptosporidium is more closely related to the gregarines than to coccidiaas shown by phylogenetic analysis of apicomplexan parasites inferred usingsmall-subunit ribosomal RNA gene sequences

Citation
Ra. Carreno et al., Cryptosporidium is more closely related to the gregarines than to coccidiaas shown by phylogenetic analysis of apicomplexan parasites inferred usingsmall-subunit ribosomal RNA gene sequences, PARASIT RES, 85(11), 1999, pp. 899-904
Citations number
44
Categorie Soggetti
Microbiology
Journal title
PARASITOLOGY RESEARCH
ISSN journal
09320113 → ACNP
Volume
85
Issue
11
Year of publication
1999
Pages
899 - 904
Database
ISI
SICI code
0932-0113(199911)85:11<899:CIMCRT>2.0.ZU;2-T
Abstract
The phylogenetic placement of gregarine parasites (Apicomplexa: Gregarinasi na) within the Apicomplexa was derived by comparison of small-subunit ribos omal RNA gene sequences. Gregarine sequences were obtained from Gregarina n iphandrodes Clopton, Percival, and Janovy, 1991, and Monocystis agilis Stei n, 1848 (Eugregarinorida Leger 1900), as well as from Ophriocystis elektros cirrha McLaughlin and Myers, 1970 (Neogregarinorida Grasse 1953). The seque nces were aligned with several other gregarine and apicomplexan sequences f rom GenBank and the resulting data matrix analyzed by parsimony and maximum -likelihood methods. The gregarines form a monophyletic clade that is a sis ter group to Cryptosporidium spp. The gregarine/ Cryptosporidium clade is s eparate from the other major apicomplexan clade containing the coccidia, ad eleids, piroplasms, and haemosporinids. The trees indicate that the genus C ryptosporidium has a closer phylogenetic affinity with the gregarines than with the coccidia. These results do not support the present classification of the Cryptosporidiidae in the suborder Eimerioirina Leger, 1911.