Diversity of insect trypanosomatids assessed from the spliced leader RNA and 5S rRNA genes and intergenic regions

Podlipaev Sergei A., Sturm Nancy R., Fiala Ivan, Fernandes Octavio, Westenberger Scott J., Dollet Michel, Campbell David A., Lukes Julius. 2004. Diversity of insect trypanosomatids assessed from the spliced leader RNA and 5S rRNA genes and intergenic regions. Journal of Eukaryotic Microbiology, 51 (3) : 283-290.

Autre titre : Diversité des trypanosomes d'insectes évaluée à travers les gènes du Splice Leader RNA et de l'ARNr 5S et leur région intergénique

Résumé : We have determined the sequences of 5S rRNA and spliced leader (SL) RNA genes, and adjacent intergenic regions for representatives of all known trypanosomatid genera parasitizing insects. The genetic loci have been analyzed separately as well as by a combined approach. Several isolates, assigned by morphology to different genera (#Leptomonas# spp., #Blastocrithidia# spp.), seem to belong to a single species with an unexpectedly wide host and geographical range. An unnamed trypanosomatid isolated from rats in Egypt was found to belong to the genus #Herpetomonas#, so far associated with insect hosts only. It is closely related to #Herpetomonas ztiplika#, a parasite of a blood-sucking biting midge. Apparently several different trypanosomatid species can infect one insect species, as exemplified by #Leptomonas# sp. PL and #Wallaceina# sp. Wsd, which were isolated from different specimens of #Salda littoralis# on the same locality and day. However, since the same species of #Leptomonas# was obtained from insect hosts belonging to different genera, some insect trypanosomatids may have low host specificity. Our data revealed additional discrepancies between molecular phylogenetic data and cell morphology, rendering current trypanosomatid taxonomy unreliable.

Mots-clés Agrovoc : Mastigophora, parasite, Insecta, arn, biodiversité, phylogénie

Mots-clés complémentaires : Trypanosomatidae

Classification Agris : L60 - Taxonomie et géographie animales
H10 - Ravageurs des plantes

Auteurs et affiliations

• Podlipaev Sergei A., ASCR (CZE)
• Sturm Nancy R., UCLA (USA)
• Fiala Ivan, ASCR (CZE)
• Fernandes Octavio, Instituto Oswaldo Cruz (BRA)
• Westenberger Scott J., UCLA (USA)
• Dollet Michel, CIRAD-EMVT-SANTE ANIMALE (FRA)
• Campbell David A., UCLA (USA)
• Lukes Julius, ASCR (CZE)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/523137/)

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