Publications by authors named "Ariel da Costa Canena"

Article Synopsis
  • Borrelia theileri is a tick-borne spirochete that causes health issues like fever and reduced food intake in cattle, and this study explores its presence in wild tapirs in South America.* -
  • Researchers collected blood samples from 99 tapirs across the Pantanal and Cerrado biomes, using a qPCR assay to detect B. theileri DNA, finding a low positive rate of 2% in tapirs from the Pantanal.* -
  • The study found sequences of B. theileri in tapirs closely related to previously detected sequences in cattle and various tick species from different regions, expanding knowledge on the potential hosts of this pathogen.*
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Article Synopsis
  • The maned sloth is an endangered species in Brazil, with limited research on its biology and anesthesia needs.
  • A study involved anesthetizing 12 free-range maned sloths using ketamine and medetomidine, monitoring their physiological parameters during the procedure.
  • The anesthesia resulted in quick induction but longer recovery times compared to other species, and overall, the anesthetic combination proved to be safe and effective for maned sloths.
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The genus Bartonella (Hyphomicrobiales: Bartonellaceae) encompasses facultative intracellular α-proteobacteria that parasite erythrocytes and endothelial cells from a wide range of vertebrate hosts and can cause disease in animals and humans. Considering the large diversity of vertebrate species that may act as reservoirs and arthropod species that may be associated with Bartonella transmission, the exposure of animals and humans to these microorganisms is likely underestimated. The present study aimed to investigate the occurrence of Bartonella sp.

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The low-land tapir () is the largest wild terrestrial mammal found in Brazil. Although has been already reported as a host of hemoparasites, the occurrence and genetic identity of Piroplasmida agents in this species is still cloudy. Although it is reported that , an endemic equid-infective agent in Brazil, is occurring in lowland tapirs, these reports are probably misconceived diagnoses since they are solely based on small fragments of 18S rRNA that may not achieve accurate topologies on phylogenetic analyses.

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The lowland tapir () is the largest land mammal in Brazil and classified as a vulnerable species, according to the assessment of the risk of extinction. The present study aimed at investigating the occurrence and genetic diversity of hemoplasmas in free-ranging from the Brazilian Pantanal and Cerrado biomes. Blood samples were collected from 94 living and eight road-killed tapirs, totalizing 125 samples Conventional PCR targeting four different genes (16S rRNA, 23S rRNA, , and ) were performed, and the obtained sequences were submitted for phylogenetic, genotype diversity, and distance analyses.

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Free-ranging yellow armadillos (Euphractus sexcinctus) from the Brazilian Pantanal were captured for surgical implantation of intra-abdominal radio transmitters. During March 2014, 11 animals were chemically immobilized with a combination of intramuscular ketamine hydrochloride, xylazine hydrochloride, midazolam maleate, and atropine sulfate. The mean induction time and initial heart rate in males was higher than in females.

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