Kinetoplastids include species economically important in agriculture, livestock, and human health. We evaluated the richness of kinetoplastids that infect small mammals in patches of unflooded forests in the Pantanal biome, an area where we hypothesize that its diversity is higher than currently recognized. Hemocultures (HC) and Next Generation Sequencing (NGS) targeting the 18S rDNA gene were employed for the detection of kinetoplastids. We grouped the positive samples into pools for each small mammal species (, , , , , and ). Eight parasite species were identified: , ; (HC + NGS), , , (HC + NGS), sp. DID, and sp. The use of a tool as sensitive as NGS has increased our awareness of the diversity of kinetoplastids, as well as their host range, with emphasis on the species (seven kinetoplastid species, excepting in a pool of nine individuals) and (four kinetoplastid species in a single individual). Furthermore, and infections were described in small mammals from this region for the first time. These findings make it mandatory to revisit the kinetoplastids/host associations proposed so far.
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http://dx.doi.org/10.3390/pathogens11101205 | DOI Listing |
Nat Commun
January 2025
EMBL Grenoble, 71 Avenue des Martyrs, Grenoble, France.
Kinetoplastids are a clade of eukaryotic protozoans that include human parasitic pathogens like trypanosomes and Leishmania species. In these organisms, protein-coding genes are transcribed as polycistronic pre-mRNAs, which need to be processed by the coupled action of trans-splicing and polyadenylation to yield monogenic mature mRNAs. During trans-splicing, a universal RNA sequence, the spliced leader RNA (SL RNA) mini-exon, is added to the 5'-end of each mRNA.
View Article and Find Full Text PDFPathogens
December 2024
Centro de Medicina Tropical, División de Investigación, Facultad de Medicina, Universidad Nacional Autónoma de México, Mexico City 04510, Mexico.
The Trypanosomatidae family encompasses around 24 genera of unicellular protozoans, many of which are transmitted by various hematophagous arthropods, particularly members of the Orders Diptera and Hemiptera. Fleas and ticks-an understudied group of ectoparasites-have been shown to be hosts of a wide and crescent variety of trypanosomatid species. Further, fleas and ticks of companion animals have been particularly neglected in trypanosomatid surveillance despite the proximity to human populations and the anthropophagous habits of many of these arthropods, which can potentially act as vectors of zoonotic trypanosomatids.
View Article and Find Full Text PDFBMC Biol
December 2024
Life Science Research Centre, Faculty of Science, University of Ostrava, Ostrava, 710 00, Czech Republic.
Background: In trypanosomatids, a group of unicellular eukaryotes that includes numerous important human parasites, cis-splicing has been previously reported for only two genes: a poly(A) polymerase and an RNA helicase. Conversely, trans-splicing, which involves the attachment of a spliced leader sequence, is observed for nearly every protein-coding transcript. So far, our understanding of splicing in this protistan group has stemmed from the analysis of only a few medically relevant species.
View Article and Find Full Text PDFmBio
December 2024
Institute of Parasitology, Biology Centre, Czech Academy of Sciences, České Budějovice (Budweis), Czechia.
Unlabelled: Transmission of genetic material from one generation to the next is a fundamental feature of all living cells. In eukaryotes, a macromolecular complex called the kinetochore plays crucial roles during chromosome segregation by linking chromosomes to spindle microtubules. Little is known about this process in evolutionarily diverse protists.
View Article and Find Full Text PDFChemMedChem
January 2025
Centre of Excellence for Pharmaceutical Sciences (Pharmacen), Faculty of Health Sciences, North-West University, 11 Hoffmann Street, Potchefstroom, 2520, South Africa.
Neglected tropical diseases are a group of infectious diseases with a high endemicity in developing countries of Africa, Asia, and the Americas. Treatment for these diseases depends solely on chemotherapy, which is associated with severe side effects, toxicity, and the development of parasitic resistance. This highlights a critical need to develop new and effective drugs to curb these diseases.
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