Detection of Rickettsia spp. in ticks parasitizing toads (Rhinella marina) in the northern Brazilian Amazon

Experimental & Applied Acarology
Hermes R LuzMarcelo B Labruna

Abstract

This study evaluated rickettsial infection in ticks collected on toads from the northern Brazilian Amazon (Amapá state), where to our knowledge there are neither records of ticks from amphibians nor rickettsial infections in ticks. During 2016-2017, a total of 22 free-living toads were captured and identified as Rhinella marina. Overall, 12 (54.5%) toads were parasitized by a total of 97 ticks (6 males, 39 females, 31 nymphs, 21 larvae), giving a mean intensity of 8.1 ticks per infested toad. Two tick species were morphologically identified: Amblyomma rotundatum Koch (31 females, 14 nymphs), and Amblyomma dissimile Koch (6 males, 8 females, 17 nymphs). The 21 larvae were morphologically denoted as Amblyomma sp. Five toads were co-infested by A. rotundatum and A. dissimile. Morphological identifications were confirmed by nucleotide sequencing of fragments of the mitochondrial genes 16S rDNA, 12S rDNA and/or COX1. A total of 54 ticks were analyzed for the presence of rickettsial DNA. Eleven (9 females and 2 nymphs) out of 14 A. rotundatum ticks contained Rickettsia bellii. None of the 25 specimens of A. dissimile (6 males, 6 females, 13 nymphs) contained amplifiable rickettsial DNA. From 15 Amblyomma sp. larvae, a pool of 10 indi...Continue Reading

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Citations

Oct 3, 2019·Revista brasileira de parasitologia veterinária = Brazilian journal of veterinary parasitology : Órgão Oficial do Colégio Brasileiro de Parasitologia Veterinária·Fernando de Castro JacinaviciusDarci Moraes Barros-Battesti
Jan 17, 2020·The Journal of Animal Ecology·Jayna L DeVoreSimon Ducatez
Aug 9, 2018·Experimental & Applied Acarology·Allana Cavalcante TorresSolange Maria Gennari
Jul 16, 2020·Revista brasileira de parasitologia veterinária = Brazilian journal of veterinary parasitology : Órgão Oficial do Colégio Brasileiro de Parasitologia Veterinária·João Luiz Horacio FacciniMarcelo Bahia Labruna
Nov 26, 2020·Revista brasileira de parasitologia veterinária = Brazilian journal of veterinary parasitology : Órgão Oficial do Colégio Brasileiro de Parasitologia Veterinária·Tatiana Evelyn Hayama UenoMarcelo Bahia Labruna
Nov 3, 2020·Veterinary World·Jorge MirandaVerónica Contreras
Apr 16, 2021·Ticks and Tick-borne Diseases·Sergio BermúdezAlexander A Martínez
Dec 17, 2021·Experimental & Applied Acarology·Filipe Dantas-TorresFelipe Arley Costa Pessoa

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Datasets Mentioned

BETA
MG023141
KU720168
CP00087
MH236879
MH105048
MH236878
MH105049
MG965928

Methods Mentioned

BETA
PCR

Software Mentioned

BLAST
Geneious R9

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