Flagellate Parasites of Fish

Becker, C.D.

doi:10.1016/b978-0-12-426001-6.50016-5

Cited by 63 publications

(46 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The differences in morphology and life cycles between the genera Cryptobia and Trypanoplasma have been embraced as sufficient by several authors (e.g. Lom, 1976 ;Becker, 1977 ;Brugerolle et al, 1979), while deemed insufficient by others (e.g. Bower & Margolis, 1983 ;Woo, 1994).…”

Section: International Journal Of Systematic and Evolutionary Microbimentioning

confidence: 99%

Phylogeny of the bodonid flagellates (Kinetoplastida) based on small-subunit rRNA gene sequences.

Doležel¹,

Jirků²,

Maslov³

et al. 2000

International Journal of Systematic and Evolutionary Microbiology

View full text Add to dashboard Cite

The phylogeny of kinetoplastid flagellates was investigated by determining the sequences of the small-subunit (18S) rRNA from Bodo designis, Bodo saltans K, Bodo saltans P, Bodo sorokini, Bodo sp. (cf. uncinatus), Cruzella marina, Cryptobia helicis, Dimastigella mimosa and Parabodo nitrophilus and analysing these data together with several previously obtained sequences. The root of the kinetoplastid tree was tentatively determined to be attached to the branch of B. designis and/or Cruzella marina. Within this topology, the suborder Trypanosomatina appears as a late-emerging monophyletic group, while the suborder Bodonina is paraphyletic. Within the bodonid subtree, the branches of parasitic organisms were intermingled with free-living ones, implying multiple transitions to parasitism. The tree indicates that the genera Cryptobia and Bodo are artificial taxa. In addition, the separation of the fish cryptobias and Trypanoplasma borreli as different genera was not supported.Keywords : Kinetoplastida, Bodonina, Bodo, Cryptobia, phylogeny INTRODUCTIONStudies of protozoa from the order Kinetoplastida (phylum Euglenozoa) has yielded a large number of unexpected findings, probably more than for any other comparable group of protists ( Vickerman, 1994 ; Donelson et al., 1999). The order has been defined by the presence of a unique organelle, the kinetoplast, which represents a DNA-containing compartment of the single mitochondrion of a cell.These studies have revealed organization of the mitochondrial (kinetoplast) DNA in the form of giant networks, an unusual uridylate insertion\deletion type of RNA editing, intriguingly small kinetoplast rRNAs, Abbreviations : kDNA, kinetoplastid DNA ; LSU large-subunit ; SSU, smallsubunit ; T-PTP, topology-dependent cladistic permutation tail probability.The GenBank accession numbers of the determined SSU rRNA sequences are : AF209856 (B. designis), AF208878 (C. marina), AF208880 (C. helicis), AF208882 (D. mimosa), AF208884 [Bodo sp. (cf. uncinatus)], AF208886 (P. nitrophilus), AF208887 (B. saltans P), AF208888 (B. sorokini ), AF208889 (B. saltans K) ; and of the determined partial LSU rRNA sequences are :importation of all mitochondrial tRNAs from the cytosol, trans-splicing of cytosolic mRNAs, trypanosome surface antigen variation and a novel nucleotide in DNA referred to as base J (reviewed by Donelson et al., 1999) with this list likely to be continued in the future. Due to the early separation of Euglenozoa (Sogin et al., 1986), some of these features could have been directly inherited from the early eukaryotes, while others can represent more recent adaptations, having evolved, for example, as an adaptation to facultative anaerobiosis (Cavalier-Smith, 1997) or even at later stages, as adaptations to parasitism.Based on morphology, Kinetoplastida is traditionally divided into two suborders -Bodonina and Trypanosomatina ( Vickerman, 1976( Vickerman, , 1978Lom, 1979 ;Kivic & Walne, 1984). Members of Trypanosomatina are characterized as obligatory parasitic species with a single ...

show abstract

Section: International Journal Of Systematic and Evolutionary Microbimentioning

confidence: 99%

Phylogeny of the bodonid flagellates (Kinetoplastida) based on small-subunit rRNA gene sequences.

Doležel¹,

Jirků²,

Maslov³

et al. 2000

International Journal of Systematic and Evolutionary Microbiology

View full text Add to dashboard Cite

show abstract

“…Fish become infected with trypanosomes during blood feeding by the invertebrate host. There is no evidence of fish infection from the ingestion of infected leeches (BECKER, 1977;LOM, 1979).…”

Section: Introductionmentioning

confidence: 99%

“…The parasites live in relative equilibrium with their hosts, which present with low levels of parasitemia. However, changes in the hematological parameters have been observed (BECKER, 1977;EIRAS et al, 1990;EIRAS et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Trypanosomatids (Protozoa: Kinetoplastida) in three species of Armored Catfish from Mogi-Guaçu river, Pirassununga, São Paulo, Brazil

Molina

Madi

Solferini

et al. 2016

Rev. Bras. Parasitol. Vet.

View full text Add to dashboard Cite

Trypanosome infections have been reported in several species of fish, in majority of cases described on the basis of morphological characteristics. Trypanosomes in fish are heteroxenous and transmitted by hirudineans. This study aims to evaluate the prevalence and density of infections by Trypanosoma sp. in blood from three species of catfish, Hypostomus regani, H. strigaticeps, H. albopunctatus, from the Mogi Guaçu River, Pirassununga, São Paulo, Brazil. Further, this study intends to characterize the Trypanosoma specimens found in the blood of these fish by morphological and molecular techniques. The trypanosomes overall prevalence observed was 47.6% with a general average density of 0.75 parasites/µl of blood. Hypostomus regani and Hypostomus strigaticeps showed a significant difference in prevalence. The average densities of parasites were not significantly different among the three fish species. Similar findings were observed for the monthly variations in densities. The parasites found in the three species of catfish studied showed similar morphological characteristics. The morphological data and the statistical analyses used in this study didn't show the formation of groups. The analyses provided evidence of the presence of pleomorphisms in the trypanosomes found in the three studied fish.Keywords: Trypanosoma, fish, Hypostomus, catfish, protozoa. ResumoInfecções por tripanossomas foram descritas em diversas espécies de peixes, sendo a maioria das descrições baseada nas características morfológicas. Tripanossomas de peixes são heteroxenos e transmitidos por hirudíneos. Este estudo tem como objetivo a avaliação da prevalência e densidade da infecção por Trypanosoma sp. no sangue de três espécies de cascudos, Hypostomus regani, H.strigaticeps, H.albopunctatus, do Rio Mogi-Guaçu, Pirassununga, São Paulo, Brasil. Além disso, pretende-se a caracterização das espécies de Trypanosoma encontradas no sangue desses peixes, por meio da utilização de técnicas morfólogicas e moleculares. A prevalência total de tripanossomas foi de 47,6%, e a densidade média foi de 0,75 parasitas/ µl de sangue. Hypostomus regani e Hypostomus strigaticeps apresentaram diferenças significativas em prevalência. As médias das densidades dos parasitas não apresentaram diferenças significativas entre as três espécies de peixes estudadas. O mesmo foi observado com a variação mensal das densidades. Os parasitas encontrados nas três espécies de cascudo possuíam características morfológicas semelhantes. As análises morfológicas e estatísticas obtidas neste estudo não mostraram a formação de grupos. As análises evidenciaram a presença de pleomorfismo dos tripanossomas encontrados nas três espécies de peixes estudados.

show abstract

“…Another discrepancy is that the subdivision of the suborder Bodonina onto two families, Bodonidae and Cryptobiidae (Vickerman 1976(Vickerman , 1978, as both members mingle with each other on the tree. A separation of the fish parasites onto the genera Cryptobia and Trypanoplasma, supported by some researchers (Lom 1976, Becker 1977, Brugerolle et al 1979, and challenged by the others (Bower & Margolis 1983, Woo 1994, is also not supported.…”

mentioning

confidence: 95%

Phylogeny of the kinetoplastida: taxonomic problems and insights into the evolution of parasitism

Maslov¹,

Podlipaev

Lukeš

2001

Mem. Inst. Oswaldo Cruz

View full text Add to dashboard Cite

Flagellate Parasites of Fish

Cited by 63 publications

References 40 publications

Phylogeny of the bodonid flagellates (Kinetoplastida) based on small-subunit rRNA gene sequences.

Phylogeny of the bodonid flagellates (Kinetoplastida) based on small-subunit rRNA gene sequences.

Trypanosomatids (Protozoa: Kinetoplastida) in three species of Armored Catfish from Mogi-Guaçu river, Pirassununga, São Paulo, Brazil

Phylogeny of the kinetoplastida: taxonomic problems and insights into the evolution of parasitism

Contact Info

Product

Resources

About