ArticleExperimental & applied acarology2018
Detection of Rickettsia spp. in ticks parasitizing toads (Rhinella marina) in the northern Brazilian Amazon.
Article in Experimental & applied acarology, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.
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16 citing papers in PubMed, 46 citations in OpenAlex.
- Assessment of the Pathogenicity ofPathogens (Basel, Switzerland) · 2026Article
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- Molecular detection ofInternational journal for parasitology. Parasites and wildlife · 2025Article
- Detection of Rickettsia spp. in questing ticks (Acari: Ixodidae) from forest fragments adjacent to agricultural and livestock farms in Casanare, Colombia.Parasitology research · 2025Article
- Spatially limited pathogen pollution in an invasive tick and host system.Biological invasions · 2024Article
- Molecular characterization ofJournal of parasitic diseases : official organ of the Indian Society for Parasitology · 2023Article
- Diversity of rickettsiae in ticks (Acari: Ixodidae) collected from wild vertebrates in part of the Amazon, Cerrado, and Pantanal biomes in Brazil.Revista brasileira de parasitologia veterinaria = Brazilian journal of veterinary parasitology : Orgao Oficial do Colegio Brasileiro de Parasitologia Veterinaria · 2023Article
- Ticks on reptiles and amphibians in Central Amazonia, with notes on rickettsial infections.Experimental & applied acarology · 2022Article
- Molecular screening of ticks of the genusInternational journal for parasitology. Parasites and wildlife · 2021Article
- Diversity of ticks and detection of Rickettsia amblyommatis infecting ticks on wild birds in anthropogenic landscapes in Bahia state, northeast Brazil.Experimental & applied acarology · 2021Article
- Distribution modeling of Amblyomma rotundatum and Amblyomma dissimile in Brazil: estimates of environmental suitability.Parasitology research · 2021Article
- Article
- Detection of "Candidatus Rickettsia wissemanii" in ticks parasitizing bats (Mammalia: Chiroptera) in the northern Brazilian Amazon.Parasitology research · 2019Article
- Genome Sequence of "Microbiology resource announcements · 2019Article
- Ticks, rickettsial and erlichial infection in small mammals from Atlantic forest remnants in northeastern Brazil.International journal for parasitology. Parasites and wildlife · 2018Article
- Amblyomma ticks infesting amphibians and Squamata reptiles from the lower Amazon region, Brazil.Experimental & applied acarology · 2018Article
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Authors and funding
9 authors at 3 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
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 individuals contained Rickettsia sp. strain Colombianensi. Sequencing of the 16S rDNA amplicon derived from the positive pool yielded a sequence of A. dissimile. We detected Rickettsia sp. strain Colombianensi for the first time in Brazil. Prior records of this agent were restricted to Colombia and Honduras. In addition, we report the presence of A. rotundatum for the first time in the state of Amapá, where the only other record of A. dissimile was registered over 20 years ago.
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