2000
DOI: 10.1007/pl00008550
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Taxonomic position of the human intestinal protozoan parasite Isospora belli as based on ribosomal RNA sequences

Abstract: The taxonomic positions of Isospora belli and other members of the genus Isospora are controversial. We determined the small-subunit ribosomal RNA of I. belli and used this sequence in combination with other coccidian RNA sequences for analysis of the taxonomic position of I. belli. The phylogenetic trees we obtained provide molecular evidence for three clades within a monophyletic group that represents the suborder Eimeriina. The clade containing I. belli consists of tissue-cyst-forming coccidia (Toxoplasma a… Show more

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Cited by 37 publications
(27 citation statements)
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“…These results are distinct from those reported in the literature who demonstrated no significant intraspecific variations in SSU rDNA-encoding regions of the 38 C. belli isolates (Jongwutiwes et al 2007), and between strain CI1 present in GenBank and the isolate from a patient with chronic cystoisosporosis (Franzen et al 2000). These divergences might be related to differences in the distribution of C. belli genotypes between geographically distinct regions.…”
Section: Discussioncontrasting
confidence: 57%
“…These results are distinct from those reported in the literature who demonstrated no significant intraspecific variations in SSU rDNA-encoding regions of the 38 C. belli isolates (Jongwutiwes et al 2007), and between strain CI1 present in GenBank and the isolate from a patient with chronic cystoisosporosis (Franzen et al 2000). These divergences might be related to differences in the distribution of C. belli genotypes between geographically distinct regions.…”
Section: Discussioncontrasting
confidence: 57%
“…Analysis of 132 ST3 and ST4 isolates from humans and nonhuman primates recently revealed dramatic differences in intrasubtype diversity. No fewer than 58 sequence types (SQTs) were detected among 81 ST3 samples, while only 5 SQTs were found among 50 ST4 samples belonging to the common genotype (215). ST4 samples obtained from Denmark, England, and Nigeria shared the same SQT.…”
Section: Blastocystismentioning
confidence: 99%
“…The SSU rRNA gene and ITS1 sequences are used to determine the taxonomic status of Cystoisospora isolates (210,(214)(215)(216).…”
Section: Cystoisosporamentioning
confidence: 99%
“…10 Species-specific regions of the adjacent 18S rRNA gene have been used as a specific molecular target for C. belli, 8 and were used to reclassify Cystoisospora into the family Sarcocystidae rather than Eimeriidae. 11 In contrast, GenBank currently contains only four 28S rRNA sequences for Cystoisospora; thus, the diagnosis using 28S rRNA primers is less definitive.…”
Section: Discussionmentioning
confidence: 99%