Ticks on reptiles and amphibians in Central Amazonia,with notes on rickettsial infections |
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Authors: | Dantas-Torres Filipe Picelli Amanda Maria Sales Kamila Gaudêncio da Silva Sousa-Paula Lucas Christian de Mejia Paulo Kaefer Igor Luis Viana Lucio André Pessoa Felipe Arley Costa |
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Institution: | 1.Laboratório de Imunoparasitologia, Instituto Aggeu Magalh?es, Funda??o Oswaldo Cruz, Recife, PE, Brazil ;2.Funda??o Oswaldo Cruz – Fiocruz Rond?nia, Porto Velho, RO, Brazil ;3.Programa de Pós-Gradua??o em Biologia Experimental, Funda??o Universidade Federal de Rond?nia, Porto Velho, RO, Brazil ;4.Programa de Pós-Gradua??o em Biodiversidade Tropical, Universidade Federal do Amapá, Macapá, AP, Brazil ;5.Instituto de Ciências Biológicas, Universidade Federal do Amazonas, Manaus, AM, Brazil ;6.Laboratório de Estudos Morfofisiológicos e Parasitários, Departamento de Ciências Biológicas e da Saúde, Universidade Federal do Amapá, Macapá, AP, Brazil ;7.Laboratório de Ecologia de Doen?as Transmissíveis na Amaz?nia, Instituto Le?nidas e Maria Deane, Funda??o Oswaldo Cruz, Manaus, AM, Brazil ; |
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Abstract: | Reptiles and amphibians are exceptional hosts for different ectoparasites, including mites and ticks. In this study, we investigated tick infestations on reptiles and amphibians trapped in Central Amazonia, and also assessed the presence of rickettsial infections in the collected ticks. From September 2016 to September 2019, 385 reptiles (350 lizards, 20 snakes, 12 tortoises, and three caimans) and 120 amphibians (119 anurans and one caecilian) were captured and examined for ectoparasites. Overall, 35 (10%) lizards, three (25%) tortoises and one (0.8%) toad were parasitized by ticks (124 larvae, 32 nymphs, and 22 adults). In lizards, tick infestation varied significantly according to landscape category and age group. Based on combined morphological and molecular analyses, these ticks were identified as Amblyomma humerale (14 larvae, 12 nymphs, 19 males, and one female), Amblyomma nodosum (three larvae, one nymph, and one female), and Amblyomma rotundatum (four larvae, three nymphs, and one female), and Amblyomma spp. (103 larvae and 16 nymphs). Our study presents the first records of A. nodosum in the Amazonas state and suggests that teiid lizards are important hosts for larvae and nymphs of A. humerale in Central Amazonia. Moreover, a nymph of A. humerale collected from a common tegu (Tupinambis teguixin) was found positive for Rickettsia amblyommatis, which agrees with previous reports, suggesting that the A. humerale-R. amblyommatis relationship may be more common than currently recognized. |
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