The current status of the small subunit rRNA phylogeny of the coccidia (Sporozoa)

Morrison, David A.; Bornstein, S.; Thebo, P.; Wernery, Ulrich; Kinne, Jörg; Mattsson, Jens G.

doi:10.1016/j.ijpara.2003.11.006

Cited by 110 publications

(104 citation statements)

References 66 publications

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“…The evolutionary history of Sarcocystidae have been extensively study using 18S rRNA and 28S rRNA (ELLIS et al, 1999;MUGRIDGE et al, 1999MUGRIDGE et al, , 2000MORRISON et al, 2004). However, few nucleotide differences among species of the Toxoplasma-Neospora-Hammondia at these loci make difficult to resolve consistently their phylogenetic relationships.…”

Section: Resultsmentioning

confidence: 99%

“…However, few nucleotide differences among species of the Toxoplasma-Neospora-Hammondia at these loci make difficult to resolve consistently their phylogenetic relationships. In fact, in order to be comparable to the rest of the coccidia ToxoplasmaNeospora-Hammondia would be separate species of a single genus based only on 18S rRNA (MORRISON et al, 2004). rRNA sequences cannot always be unambiguously aligned and details of the alignment are known to greatly affect the results of phylogenetic analyses involving these sequences (MUGRIDGE et al, 2000;MORRISON et al, 2004).…”

Section: Resultsmentioning

confidence: 99%

“…In fact, in order to be comparable to the rest of the coccidia ToxoplasmaNeospora-Hammondia would be separate species of a single genus based only on 18S rRNA (MORRISON et al, 2004). rRNA sequences cannot always be unambiguously aligned and details of the alignment are known to greatly affect the results of phylogenetic analyses involving these sequences (MUGRIDGE et al, 2000;MORRISON et al, 2004). Thus, other universal markers are required to resolve phylogenies especially those that codes for proteins, which allow for robust alignments (MONTEIRO et al, 2007).…”

Section: Resultsmentioning

confidence: 99%

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Molecular phylogeny of Toxoplasmatinae: comparison between inferences based on mitochondrial and apicoplast genetic sequences

Sercundes

Valadas

Keid

et al. 2016

Rev. Bras. Parasitol. Vet.

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Phylogenies within Toxoplasmatinae have been widely investigated with different molecular markers. Here, we studied molecular phylogenies of the Toxoplasmatinae subfamily based on apicoplast and mitochondrial genes. Partial sequences of apicoplast genes coding for caseinolytic protease (clpC) and beta subunit of RNA polymerase (rpoB), and mitochondrial gene coding for cytochrome B (cytB) were analyzed. Laboratory-adapted strains of the closely related parasites Sarcocystis falcatula and Sarcocystis neurona were investigated, along with Neospora caninum, Neospora hughesi, Toxoplasma gondii (strains RH, CTG and PTG), Besnoitia akodoni, Hammondia hammondi and two genetically divergent lineages of Hammondia heydorni. The molecular analysis based on organellar genes did not clearly differentiate between N. caninum and N. hughesi, but the two lineages of H. heydorni were confirmed. Slight differences between the strains of S. falcatula and S. neurona were encountered in all markers. In conclusion, congruent phylogenies were inferred from the three different genes and they might be used for screening undescribed sarcocystid parasites in order to ascertain their phylogenetic relationships with organisms of the family Sarcocystidae. The evolutionary studies based on organelar genes confirm that the genus Hammondia is paraphyletic. The primers used for amplification of clpC and rpoB were able to amplify genetic sequences of organisms of the genus Sarcocystis and organisms of the subfamily Toxoplasmatinae as well.Keywords: Sarcocystidae, molecular characterization, phylogeny, Toxoplasmatinae, apicoplast gene, mitochondrial gene. ResumoA filogenia da subfamília Toxoplasmatinae tem sido amplamente investigada com diversos marcadores moleculares. Neste estudo, a filogenia molecular da subfamília Toxoplasmatinae foi analisada através de genes de apicoplasto e mitocondriais. Foram analisadas sequências parciais de genes de apicoplasto codificadores da protease caseinolítica (clpC), e da subunidade beta da RNA polimerase (rpoB) e de gene mitocondrial codificador de citocromo B (cytB). Foram investigadas cepas adaptadas em laboratório de Sarcocystis neurona e Sarcocystis falcatula, parasitos estreitamente relacionados, além de Neospora caninum, Neospora hughesi, Toxoplasma gondii (cepas RH, CTG e PTG), Besnoitia akodoni, Hammondia hammondi e duas linhagens geneticamente divergentes de Hammondia heydorni. A análise molecular, baseada em genes de organelas, não diferenciou claramente N. caninum de N. hughesi, porém foi possível confirmar as duas linhagens de H. heydorni. Foram encontradas pequenas diferenças entre as cepas adaptadas em laboratório de

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Molecular phylogeny of Toxoplasmatinae: comparison between inferences based on mitochondrial and apicoplast genetic sequences

Sercundes

Valadas

Keid

et al. 2016

Rev. Bras. Parasitol. Vet.

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“…Babesia, Eimeria, Plasmodium) or polyphyletic (e.g. Isospora) (Ellis et al, 1998;Perkins & Schall, 2002;Morrison et al, 2004). Clearly, there will be some major re-definition of taxonomic groups throughout the Apicomplexa.…”

Section: Taxon Samplingmentioning

confidence: 99%

“…For tree building, compositional biases are a recurring problem. Within the Apicomplexa, this is particularly troublesome for Plasmodium, which has a severely ATrich genome compared to most other taxa (Morrison et al, 2004;Morrison, 2006a), and for Aggregata, which has a very low C content (Kope cná et al, 2006). Also, juxtaposed long and short branches are now known to be problematic.…”

Section: Phylogenetic Analysesmentioning

confidence: 99%

Prospects for elucidating the phylogeny of the Apicomplexa

2008

Parasite

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Summary :The Apicomplexa is traditionally considered to contain four clearly defined groups, but the phylogenetic relationships among these groups, and their subsequent taxonomic arrangement, are currently unclear. Here, I consider five of the important criteria that need to be met before radical taxonomic changes are made, in relation to phylogenetic analyses. Unfortunately, at least four of these criteria indicate that the prospects for elucidating the phylogeny and taxonomy of the Apicomplexa are not good in the short term. A lot more pertinent data need to be collected, both in terms of taxa sampled and genes sequenced, before any concordance among phylogenies is likely to emerge; and someone (e.g. a consortium) needs to co-ordinate the active collection and analysis of these data if any worthwhile progress is to be made.

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Molecular characterization of crane Coccidia, Eimeria gruis and E. reichenowi, found in feces of migratory cranes

Matsubayashi

Takami²,

Abe

et al. 2005

Parasitol Res

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Eimeria gruis and E. reichenowi have lethal pathogenicity to a number of species of cranes. These parasites develop at multiple organs or tissues in infected cranes, thus lacking the specificity of infection sites shown by other Eimeria spp. in spite of morphologic similarity. To date, there have been many reports of crane Eimeria infections, however, genetic examinations of these parasites have never been published. In the present study, we isolated oocysts of E. gruis and E. reichenowi from crane feces at a wintering area in Japan. By phylogenic analysis, we first demonstrated that partial sequences of the isolates formed their own cluster, located separately from other Eimeria spp.

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The current status of the small subunit rRNA phylogeny of the coccidia (Sporozoa)

Cited by 110 publications

References 66 publications

Molecular phylogeny of Toxoplasmatinae: comparison between inferences based on mitochondrial and apicoplast genetic sequences

Molecular phylogeny of Toxoplasmatinae: comparison between inferences based on mitochondrial and apicoplast genetic sequences

Prospects for elucidating the phylogeny of the Apicomplexa

Molecular characterization of crane Coccidia, Eimeria gruis and E. reichenowi, found in feces of migratory cranes

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