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Silva AF, Caetano RL, Carriço C, Amorim M, Gazeta GS, Pinto ZT. Rhizoglyphus echinopus (Acari: Acaridae) associated with Atta sexdens (Insecta: Formicidae). Arq Inst Biol 2020. [DOI: 10.1590/1808-1657000692019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
ABSTRACT Four deutonymphs of bulb mites (hypopus) from Rhizoglyphus echinopus (Fumouze & Robin) (Acari: Acaridae) were found attached to the head of Atta sexdens in Rio de Janeiro, Brazil. This mite species is commonly associated with ornamental plants and trees with bulbs, corms and tubers. The results of this study provided an insight into the phoretic relationship between mites and ants, indicating the role of the latter in the dispersion of the first. Despite the abundant and diverse mite fauna existing in ants, little is known about their diversity, biology, ecology and the nature of their associations.
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Affiliation(s)
| | - Rebecca Leal Caetano
- Universidade Estácio de Sá, Brazil; Instituto Oswaldo Cruz – Laboratório de Educação em Ambiente e Saúde, Brazil
| | - Cesar Carriço
- Instituto Brasileiro de Medicina de Reabilitação, Brazil; Instituto Oswaldo Cruz – Laboratório de Educação em Ambiente e Saúde, Brazil
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Bitencourth K, Amorim M, DE Oliveira SV, Caetano RL, Voloch CM, Gazêta GS. Amblyomma sculptum: genetic diversity and rickettsias in the Brazilian Cerrado biome. Med Vet Entomol 2017; 31:427-437. [PMID: 28752684 DOI: 10.1111/mve.12249] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2017] [Revised: 03/19/2017] [Accepted: 04/10/2017] [Indexed: 06/07/2023]
Abstract
Amblyomma sculptum (Ixodida: Ixodidae) Berlese, 1888 is the most important tick vector in Brazil, transmitting the bioagent of the most severe form of spotted fever (SF) in part of the Cerrado (in the states of Minas Gerais and São Paulo). In another part of the Cerrado (Central-West region of Brazil), a milder form of SF has been recorded. However, neither the rickettsia nor the vector involved have been characterized. The aim of the current study was to analyse genetic variation and the presence of rickettsia in A. sculptum in Cerrado, from silent areas and with the milder form of SF. Samples were subjected to DNA extraction, amplification and sequencing of 12S rDNA, cytochrome oxidase subunit II and D-loop mitochondrial genes (for tick population analyses), and gltA, htrA, ompA and gene D (sca4) genes for rickettsia researches. Exclusive haplotypes with low frequencies, high haplotype diversity and low nucleotide diversity, star-shaped networks and significant results in neutrality tests indicate A. sculptum population expansions in some areas. Rickettsia amblyommatis, Candidatus Rickettsia andeanae and Rickettsia felis were detected. The A. sculptum diversity is not geographically, or biome delimited, pointing to a different potential in vector capacity, possibly associated with differing tick genetic profiles.
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Affiliation(s)
- K Bitencourth
- Laboratório de Referência Nacional em Vetores das Riquetsioses, Fundação Oswaldo Cruz, Rio de Janeiro, Brazil
- Programa de Pós-Graduação em Biodiversidade e Saúde, Fundação Oswaldo Cruz, Rio de Janeiro, Brazil
| | - M Amorim
- Laboratório de Referência Nacional em Vetores das Riquetsioses, Fundação Oswaldo Cruz, Rio de Janeiro, Brazil
| | - S V DE Oliveira
- Secretaria de Vigilância em Saúde, Ministério da Saúde, Unidade Técnica de Vigilância de Zoonoses, Brasília, Brazil
| | - R L Caetano
- Laboratório de Referência Nacional em Vetores das Riquetsioses, Fundação Oswaldo Cruz, Rio de Janeiro, Brazil
| | - C M Voloch
- Laboratório de Biologia Evolutiva Teórica e Aplicada, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - G S Gazêta
- Laboratório de Referência Nacional em Vetores das Riquetsioses, Fundação Oswaldo Cruz, Rio de Janeiro, Brazil
- Programa de Pós-Graduação em Biodiversidade e Saúde, Fundação Oswaldo Cruz, Rio de Janeiro, Brazil
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Caetano RL, Vizzoni VF, Bitencourth K, Carriço C, Sato TP, Pinto ZT, De Oliveira SV, Amorim M, Voloch CM, Gazeta GS. Ultrastructural Morphology and Molecular Analyses of Tropical and Temperate "Species" of Rhipicephalus sanguineus sensu lato (Acari: Ixodidae) in Brazil. J Med Entomol 2017; 54:1201-1212. [PMID: 28399274 PMCID: PMC5850649 DOI: 10.1093/jme/tjx066] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/22/2016] [Indexed: 06/07/2023]
Abstract
The Rhipicephalus sanguineus (Latreille) complex (Acari:Ixodidae) is composed of species with intra- and interspecific morphological variation that make their diagnosis difficult. In the present study, male specimens of the R. sanguineus complex were collected from dogs in six districts of three regions of Brazil and submitted to molecular and scanning electron microscopy (SEM) analyses. Analysis of COX1 gene, 12S rDNA, and D-loop rDNA shows that ticks classified as R. sanguineus form two different clades. Morphological comparisons using SEM found adult males to exhibit morphological differences in Haller's organ, festoons, and adanal, spiracular, and genital plates, with the last having potential usefulness in distinguishing male specimens of the complex.
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Affiliation(s)
- Rebecca Leal Caetano
- Instituto Oswaldo Cruz/Fundação Oswaldo Cruz (IOC/FIOCRUZ), Laboratório de Referência Nacional em Vetores das Riquetsioses, Avenida Brasil, 4365, CEP 21040-900, Rio de Janeiro, RJ, Brazil (; ; ; ; ; ; )
- Instituto Oswaldo Cruz/Fundação Oswaldo Cruz (IOC/FIOCRUZ), Programa de Pós-Graduação em Biodiversidade e Saúde, Avenida Brasil, 4365, CEP 21040-900, Rio de Janeiro, RJ, Brazil
- Universidade Estácio de Sá (UNESA), Rua Bingen, 50 – Bingen, CEP 25660-004, Petrópolis, RJ, Brazil
- Corresponding author, e-mail:
| | - Vinicius Figueiredo Vizzoni
- Instituto Oswaldo Cruz/Fundação Oswaldo Cruz (IOC/FIOCRUZ), Laboratório de Referência Nacional em Vetores das Riquetsioses, Avenida Brasil, 4365, CEP 21040-900, Rio de Janeiro, RJ, Brazil (; ; ; ; ; ; )
| | - Karla Bitencourth
- Instituto Oswaldo Cruz/Fundação Oswaldo Cruz (IOC/FIOCRUZ), Laboratório de Referência Nacional em Vetores das Riquetsioses, Avenida Brasil, 4365, CEP 21040-900, Rio de Janeiro, RJ, Brazil (; ; ; ; ; ; )
- Instituto Oswaldo Cruz/Fundação Oswaldo Cruz (IOC/FIOCRUZ), Programa de Pós-Graduação em Biodiversidade e Saúde, Avenida Brasil, 4365, CEP 21040-900, Rio de Janeiro, RJ, Brazil
| | - Cesar Carriço
- Instituto Oswaldo Cruz/Fundação Oswaldo Cruz (IOC/FIOCRUZ), Laboratório de Referência Nacional em Vetores das Riquetsioses, Avenida Brasil, 4365, CEP 21040-900, Rio de Janeiro, RJ, Brazil (; ; ; ; ; ; )
| | - Tayra Pereira Sato
- Instituto Oswaldo Cruz/Fundação Oswaldo Cruz (IOC/FIOCRUZ), Laboratório de Referência Nacional em Vetores das Riquetsioses, Avenida Brasil, 4365, CEP 21040-900, Rio de Janeiro, RJ, Brazil (; ; ; ; ; ; )
- Universidade Federal de Juiz de Fora (UFJF), Programa de Pós-Graduação em Comportamento e Biologia Animal, MG, Brazil
| | - Zeneida Teixeira Pinto
- Instituto Oswaldo Cruz/Fundação Oswaldo Cruz (IOC/FIOCRUZ), Laboratório de Educação em Ambiente e Saúde, Avenida Brasil, 4365, CEP 21040-900, Rio de Janeiro, RJ, Brazil ()
| | - Stefan Vilges De Oliveira
- Secretaria de Vigilância em Saúde/Ministério da Saúde (SVS/MS), Unidade técnica de vigilância de zoonoses, SCS - Quadra 04 Bloco “A” Edifício Principal - 3º Andar, CEP: 70.304-000, DF, Brazil ()
| | - Marinete Amorim
- Instituto Oswaldo Cruz/Fundação Oswaldo Cruz (IOC/FIOCRUZ), Laboratório de Referência Nacional em Vetores das Riquetsioses, Avenida Brasil, 4365, CEP 21040-900, Rio de Janeiro, RJ, Brazil (; ; ; ; ; ; )
| | - Carolina Moreira Voloch
- Laboratório de Biologia Evolutiva Teórica e Aplicada, Universidade Federal do Rio de Janeiro - UFRJ, Instituto de Biologia, Departamento de Genética, Av. Prof. Rodolpho Paulo Rocco s/n CCS, Bloco A, A2-097, Ilha do Fundão - Rio de Janeiro, RJ, CEP: 21941-901, Brazil ()
| | - Gilberto Salles Gazeta
- Instituto Oswaldo Cruz/Fundação Oswaldo Cruz (IOC/FIOCRUZ), Laboratório de Referência Nacional em Vetores das Riquetsioses, Avenida Brasil, 4365, CEP 21040-900, Rio de Janeiro, RJ, Brazil (; ; ; ; ; ; )
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Ratcliffe NA, Vieira CS, Mendonça PM, Caetano RL, Queiroz MMDC, Garcia ES, Mello CB, Azambuja P. Detection and preliminary physico-chemical properties of antimicrobial components in the native excretions/secretions of three species of Chrysomya (Diptera, Calliphoridae) in Brazil. Acta Trop 2015; 147:6-11. [PMID: 25817237 DOI: 10.1016/j.actatropica.2015.03.021] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2014] [Revised: 03/12/2015] [Accepted: 03/17/2015] [Indexed: 12/21/2022]
Abstract
Antibiotic-resistant bacteria in hospitals and communities increasingly threaten public health in Brazil and the rest of the World. There is an urgent need for additional antimicrobial drugs. Calliphorid blowfly larvae are a rich source of antimicrobial factors but the potential of Neotropical species has been neglected. This preliminary study evaluates the antimicrobial activity of the native excretions/secretions of larvae of three species of Brazilian calliphorids, Chrysomya megacephala, Chrysomya albiceps and Chrysomya putoria. Native excretions/secretions were collected from third instar larvae, sterile filtered and tested for antibacterial activity against Staphylococcus aureus 9518, Escherichia coli K12 4401 and Serratia marcescens 365. Turbidometric assays were made in micro-plates, using an ELISA reader, with readings taken up to 22 h. Bacterial suspensions at the start and end of each experiment were also serially diluted, spread on nutrient agar plates and then colony forming units counted. The physico-chemical characteristics of the native excretions/secretions were also tested by freezing/thawing, boiling, and protease digestion. The native excretions/secretions of larvae from these three Chrysomya species significantly inhibited bacterial growth. Therefore, Brazilian calliphorid flies could potentially provide new classes of antibiotics.
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