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Arroyo-Ramírez A, Lugo-Caballero C, Panti-May JA, Reyes-Novelo E, Rodríguez-Vivas RI, Noh-Pech H, Suárez-Galaz A, Osorio-Primo T, Puerto FI, Dzul-Rosado K, Torres-Castro M. An unusual identification of Rickettsia parkeri in synanthropic rodents and domiciliated dogs of a rural community from Yucatán, Mexico. Zoonoses Public Health 2023; 70:594-603. [PMID: 37391871 DOI: 10.1111/zph.13068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 05/19/2023] [Accepted: 06/16/2023] [Indexed: 07/02/2023]
Abstract
Rickettsia parkeri belongs to the spotted fever group (SFG) of the Rickettsia genus. This bacterium causes mild rickettsiosis in humans and is mainly transmitted by Amblyomma ticks. Its medical importance is emerging in the Americas, including Mexico. Synanthropic rodents and domiciled dogs participate as accidental hosts in epidemiological cycles of Rickettsia of the SFG. The aim is to report the presence of R. parkeri in synanthropic rodents and domiciled dogs from a rural community of Yucatán, Mexico. Rodents were captured, and plasma samples were taken from dogs in 48 households from Ucú, Yucatán, Mexico. A spleen sample (rodents) and plasma (dogs) were used in the propagation of Rickettsia on Vero cells. These infected cells were used in the extraction of genomic DNA. Rickettsia DNA was identified using a semi-nested PCR (snPCR); some products were sent for sequencing. The recovered sequences were analysed with bioinformatics programs, and a phylogenetic tree was built to determine the Rickettsia species. One hundred animals were sampled: 36 synanthropic rodents and 64 dogs. The snPCR evidenced the presence of Rickettsia DNA in 10 rodents (10/36, 27.8%) and 18 dogs (18/64, 28.1%), which represents a global frequency of 28% (28/100) in this study. The bioinformatics analysis yielded homology to R. parkeri and was demonstrated in the phylogenetic tree. The first evidence of the presence of R. parkeri in synanthropic rodents (Mus musculus) from Mexico is presented; likewise, the participation of domestic dogs in the transmission cycle of this bacterium with potential importance in public health is confirmed.
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Affiliation(s)
- Abigail Arroyo-Ramírez
- Laboratorio de Enfermedades Emergentes y Reemergentes, Centro de Investigaciones Regionales "Dr. Hideyo Noguchi", Universidad Autónoma de Yucatán, Mérida, Mexico
| | - César Lugo-Caballero
- Laboratorio de Enfermedades Emergentes y Reemergentes, Centro de Investigaciones Regionales "Dr. Hideyo Noguchi", Universidad Autónoma de Yucatán, Mérida, Mexico
| | - J Alonso Panti-May
- Laboratorio de Zoonosis y otras Enfermedades Transmitidas por Vector, Centro de Investigaciones Regionales "Dr. Hideyo Noguchi", Universidad Autónoma de Yucatán, Mérida, Mexico
| | - Enrique Reyes-Novelo
- Laboratorio de Zoonosis y otras Enfermedades Transmitidas por Vector, Centro de Investigaciones Regionales "Dr. Hideyo Noguchi", Universidad Autónoma de Yucatán, Mérida, Mexico
| | - Roger I Rodríguez-Vivas
- Laboratorio de Parasitología, Facultad de Medicina Veterinaria y Zootecnia, Universidad Autónoma de Yucatán, Mérida, Mexico
| | - Henry Noh-Pech
- Laboratorio de Enfermedades Emergentes y Reemergentes, Centro de Investigaciones Regionales "Dr. Hideyo Noguchi", Universidad Autónoma de Yucatán, Mérida, Mexico
| | - Alejandro Suárez-Galaz
- Laboratorio de Enfermedades Emergentes y Reemergentes, Centro de Investigaciones Regionales "Dr. Hideyo Noguchi", Universidad Autónoma de Yucatán, Mérida, Mexico
| | - Tana Osorio-Primo
- Laboratorio de Enfermedades Emergentes y Reemergentes, Centro de Investigaciones Regionales "Dr. Hideyo Noguchi", Universidad Autónoma de Yucatán, Mérida, Mexico
| | - Fernando I Puerto
- Laboratorio de Enfermedades Emergentes y Reemergentes, Centro de Investigaciones Regionales "Dr. Hideyo Noguchi", Universidad Autónoma de Yucatán, Mérida, Mexico
| | - Karla Dzul-Rosado
- Laboratorio de Enfermedades Emergentes y Reemergentes, Centro de Investigaciones Regionales "Dr. Hideyo Noguchi", Universidad Autónoma de Yucatán, Mérida, Mexico
| | - Marco Torres-Castro
- Laboratorio de Enfermedades Emergentes y Reemergentes, Centro de Investigaciones Regionales "Dr. Hideyo Noguchi", Universidad Autónoma de Yucatán, Mérida, Mexico
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Epidemiological Study of the Occurrence of Typhus Group Rickettsia Natural Infection in Domiciliated Dogs from a Rural Community in South-Eastern Mexico. Animals (Basel) 2022; 12:ani12202885. [PMID: 36290270 PMCID: PMC9598504 DOI: 10.3390/ani12202885] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Revised: 10/14/2022] [Accepted: 10/19/2022] [Indexed: 11/25/2022] Open
Abstract
Simple Summary Rickettsioses are relevant emergent and reemergent zoonoses in the Americas, including Mexico. Murine typhus caused by typhus group (TG) Rickettsia is prevalent in humans and their companion animals, such as dogs. This study found that 23.9% of the dogs (34/142) were infected by TG Rickettsia in Maxcanú, Yucatan (southeastern Mexico). Statistical analyses showed that reduced outdoor activities, age, sex and previous antiparasitic treatment are associated factors with less risk of TG Rickettsia infection in the sampled dogs. Monitoring and controlling these factors could help to restrict the enzootic transmission risk and prevent the potential zoonotic transmission. Abstract The aim is to describe the Typhus group (TG) Rickettsia infection in dogs and to identify factors associated with this infection. We collected blood samples and gathered exposure and clinical data of 142 dogs from a rural community of Yucatan. The Rickettsia group was determined by semi-nested PCR. Generalized linear models with binomial error distribution were used to model the associated factors from the dog sample for risk ratio (RR) estimation. Thirty-four dogs (23.9%) showed molecular evidence of TG Rickettsia DNA. The multivariate model showed that mixed-breed dogs (RR = 0.06) and dogs that had received antiparasitic treatment (RR = 0.049) had a lower risk of getting infected, taking as reference the purebred group and the non-treated dogs, respectively. Looking at variable interactions, adult dogs without outdoor activities had a lower infection risk than puppies (RR = 0.26). Among dogs with antiparasitic treatment, females had a higher infection risk than male dogs (RR = 26.2). The results showed enzootic TG Rickettsia circulation in dogs of a rural community. The factors outdoor activities, age and previous antiparasitic treatment, as well as the clinical variables signs of hemorrhages and epistaxis, were associated with a less chance of natural infection in the studied dogs. Prevention and control of the enzootic transmission risk of TG Rickettsia should help to reduce the potential zoonotic transmission of this pathogen.
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da Costa IN, de Abreu Rangel Aguirre A, de Paulo PFM, de Souza Rodrigues MM, da Silva Rodrigues V, Suzin A, Szabó MPJ, Andreotti R, Medeiros JF, Garcia MV. Diversity of free-living ticks and serological evidence of spotted fever group Rickettsia and ticks associated to dogs, Porto Velho, Western Amazon, Brazil. EXPERIMENTAL & APPLIED ACAROLOGY 2021; 83:555-573. [PMID: 33779896 DOI: 10.1007/s10493-021-00604-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Accepted: 03/01/2021] [Indexed: 06/12/2023]
Abstract
Rondônia is the only state in the North Region of Brazil to have registered confirmed cases of Brazilian Spotted Fever (BSF). The present study investigated the epidemiological cycle of Rickettsia spp. by surveying free-living ixodofauna and tick parasitism of dogs in the municipality of Porto Velho, Rondônia State. Ticks and dogs were tested for the presence of Rickettsia spp. DNA and dog serum was tested for reactivity to anti-Rickettsia spp. antibodies. Tick collection and dog blood sampling were performed in peri-urban and rural environments at 11 locations. Eight free-living Amblyomma species and one Haemaphysalis species were collected: A. scalpturatum, A. naponense, A. oblongoguttatum, A. coelebs, A. latepunctatum, A. pacae, A. ovale, Amblyomma sp., and H. juxtakochi. Three tick species were found parasitizing dogs: Rhipicephalus sanguineus sensu lato, A. oblongoguttatum and A. ovale. Molecular analysis did not identify the presence of the gltA gene fragment in any tick specimen. Results from an indirect immunofluorescent assay (IFA) showed that 20.8% of peri-urban and 15.4% of rural dog sera exhibited reactivity to Rickettsia rhipicephali, Rickettsia amblyommatis, Rickettsia bellii and Rickettsia parkeri antigens. Antibody prevalence in dogs was 16.4%. This study is the first to describe the prevalence of Rickettsia spp. infection in dogs from Porto Velho municipality. Our findings enhance current knowledge of Rickettsia spp. circulation in the Western Amazon.
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Affiliation(s)
- Ivaneide Nunes da Costa
- Laboratório de Entomologia, Fiocruz Rondônia, Fundação Oswaldo Cruz, Porto Velho, RO, Brazil
- Programa de Pós-Graduação em Biologia Experimental, Universidade Federal de Rondônia, Porto Velho, RO, Brazil
| | | | | | | | - Vinícius da Silva Rodrigues
- Programa de Pós-Graduação em Imunologia e Parasitologia Aplicadas-Universidade Federal de Uberlândia, Uberlândia, Minas Gerais, Brazil
| | - Adriane Suzin
- Programa de Pós-Graduação em Imunologia e Parasitologia Aplicadas-Universidade Federal de Uberlândia, Uberlândia, Minas Gerais, Brazil
| | - Matías Pablo Juan Szabó
- Programa de Pós-Graduação em Imunologia e Parasitologia Aplicadas-Universidade Federal de Uberlândia, Uberlândia, Minas Gerais, Brazil
| | - Renato Andreotti
- Laboratórios de Biologia e Biologia Molecular do Carrapato, Embrapa Gado de Corte, Campo Grande, Mato Grosso do Sul, Brazil
| | | | - Marcos Valério Garcia
- Bolsista Fundapam/Laboratório de Biologia do Carrapato, Embrapa Gado de Corte, Campo Grande, MS, Brazil
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Romer Y, Borrás P, Govedic F, Nava S, Carranza JI, Santini S, Armitano R, Lloveras S. Clinical and epidemiological comparison of Rickettsia parkeri rickettsiosis, related to Amblyomma triste and Amblyomma tigrinum, in Argentina. Ticks Tick Borne Dis 2020; 11:101436. [DOI: 10.1016/j.ttbdis.2020.101436] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Revised: 03/05/2020] [Accepted: 03/27/2020] [Indexed: 11/26/2022]
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Maggi RG, Krämer F. A review on the occurrence of companion vector-borne diseases in pet animals in Latin America. Parasit Vectors 2019; 12:145. [PMID: 30917860 PMCID: PMC6438007 DOI: 10.1186/s13071-019-3407-x] [Citation(s) in RCA: 64] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Accepted: 03/21/2019] [Indexed: 02/07/2023] Open
Abstract
Companion vector-borne diseases (CVBDs) are an important threat for pet life, but may also have an impact on human health, due to their often zoonotic character. The importance and awareness of CVBDs continuously increased during the last years. However, information on their occurrence is often limited in several parts of the world, which are often especially affected. Latin America (LATAM), a region with large biodiversity, is one of these regions, where information on CVBDs for pet owners, veterinarians, medical doctors and health workers is often obsolete, limited or non-existent. In the present review, a comprehensive literature search for CVBDs in companion animals (dogs and cats) was performed for several countries in Central America (Belize, Caribbean Islands, Costa Rica, Cuba, Dominican Republic, El Salvador, Guatemala, Honduras, Mexico, Nicaragua, Panama, Puerto Rico) as well as in South America (Argentina, Bolivia, Brazil, Chile, Colombia, Ecuador, French Guiana, Guyana (British Guyana), Paraguay, Peru, Suriname, Uruguay, Venezuela) regarding the occurrence of the following parasitic and bacterial diseases: babesiosis, heartworm disease, subcutaneous dirofilariosis, hepatozoonosis, leishmaniosis, trypanosomosis, anaplasmosis, bartonellosis, borreliosis, ehrlichiosis, mycoplasmosis and rickettsiosis. An overview on the specific diseases, followed by a short summary on their occurrence per country is given. Additionally, a tabular listing on positive or non-reported occurrence is presented. None of the countries is completely free from CVBDs. The data presented in the review confirm a wide distribution of the CVBDs in focus in LATAM. This wide occurrence and the fact that most of the CVBDs can have a quite severe clinical outcome and their diagnostic as well as therapeutic options in the region are often difficult to access and to afford, demands a strong call for the prevention of pathogen transmission by the use of ectoparasiticidal and anti-feeding products as well as by performing behavioural changes.
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Affiliation(s)
- Ricardo G. Maggi
- Department of Clinical Sciences and the Intracellular Pathogens Research Laboratory, College of Veterinary Medicine, North Carolina State University, Raleigh, NC USA
| | - Friederike Krämer
- Institute of Parasitology, Faculty of Veterinary Medicine, Leipzig University, Leipzig, Germany
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Lado P, Nava S, Mendoza-Uribe L, Caceres AG, Delgado-de la Mora J, Licona-Enriquez JD, Delgado-de la Mora D, Labruna MB, Durden LA, Allerdice MEJ, Paddock CD, Szabó MPJ, Venzal JM, Guglielmone AA, Beati L. The Amblyomma maculatum Koch, 1844 (Acari: Ixodidae) group of ticks: phenotypic plasticity or incipient speciation? Parasit Vectors 2018; 11:610. [PMID: 30497533 PMCID: PMC6267817 DOI: 10.1186/s13071-018-3186-9] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Accepted: 11/06/2018] [Indexed: 11/26/2022] Open
Abstract
BACKGROUND The goal of this study was to reassess the taxonomic status of A. maculatum, A. triste and A. tigrinum by phylogenetic analysis of five molecular markers [four mitochondrial: 12S rDNA, 16S rDNA, the control region (DL) and cytochrome c oxidase 1 (cox1), and one nuclear: ribosomal intergenic transcribed spacer 2 (ITS2)]. In addition, the phenotypic diversity of adult ticks identified as A. maculatum and A. triste from geographically distinct populations was thoroughly re-examined. RESULTS Microscopic examination identified four putative morphotypes distinguishable by disjunct geographical ranges, but very scant fixed characters. Analysis of the separated mitochondrial datasets mostly resulted in conflicting tree topologies. Nuclear gene sequences were almost identical throughout the geographical ranges of the two species, suggesting a very recent, almost explosive radiation of the terminal operational taxonomic units. Analysis of concatenated molecular datasets was more informative and indicated that, although genetically very close to the A. maculatum - A. triste lineage, A. tigrinum was a monophyletic separate entity. Within the A. maculatum - A. triste cluster, three main clades were supported. The two morphotypes, corresponding to the western North American and eastern North American populations, consistently grouped in a single monophyletic clade with many shared mitochondrial sequences among ticks of the two areas. Ticks from the two remaining morphotypes, south-eastern South America and Peruvian, corresponded to two distinct clades. CONCLUSIONS Given the paucity of morphological characters, the minimal genetic distance separating morphotypes, and more importantly the fact that two morphotypes are genetically indistinguishable, our data suggest that A. maculatum and A. triste should be synonymized and that morphological differences merely reflect very recent local adaptation to distinct environments in taxa that might be undergoing the first steps of speciation but have yet to complete lineage sorting. Nonetheless, future investigations using more sensitive nuclear markers and/or crossbreeding experiments might reveal the occurrence of very rapid speciation events in this group of taxa. Tentative node dating revealed that the A. tigrinum and A. maculatum - A. triste clades split about 2 Mya, while the A. maculatum - A.triste cluster radiated no earlier than 700,000 years ago.
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Affiliation(s)
- Paula Lado
- U. S. National Tick Collection, Institute for Coastal Plain Science, Georgia Southern University, Statesboro, GA 30460 USA
- Present address: Department of Evolution, Ecology, and Organismal Biology, The Ohio State University, Columbus, OH 43212 USA
| | - Santiago Nava
- Instituto Nacional de Tecnologia Agropecuaria, Estación Experimental Agropecuaria Rafaela, Santa Fe, Argentina
| | | | - Abraham G. Caceres
- Departamento Académico de Microbiologia Médica, Facultad de Medicina, Universidad Nacional Mayor de San Marcos, Lima, Peru
- Laboratorio de Entomología, Instituto Nacional de Salud, Lima, Peru
| | | | | | - David Delgado-de la Mora
- Department of Agronomic and Veterinary Sciences, Technologic Institute of Sonora, Ciudad Obregón, Sonora Mexico
| | - Marcelo B. Labruna
- Departamento de Medicina Veterinária Preventiva e Saúde Animal, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, São Paulo, Brazil
| | - Lance A. Durden
- Department of Biology, Georgia Southern University, Statesboro, GA 30460 USA
| | - Michelle E. J. Allerdice
- Rickettsial Zoonoses Branch, National Center for Emerging and Zoonotic Infectious Diseases, Centers for Disease Control and Prevention, Atlanta, GA USA
| | - Christopher D. Paddock
- Rickettsial Zoonoses Branch, National Center for Emerging and Zoonotic Infectious Diseases, Centers for Disease Control and Prevention, Atlanta, GA USA
| | - Matias P. J. Szabó
- Laboratório de Ixodologia, Faculdade de Medicina Veterinária, Universidade Federal de Uberlândia, Uberlândia, Minas Gerais Brazil
| | - José M. Venzal
- Departamento de Parasitología Veterinaria, Facultad de Veterinaria, Universidad de la República, Regional Norte - Salto, Rivera 1350, 50000 Salto, CP Uruguay
| | - Alberto A. Guglielmone
- Instituto Nacional de Tecnologia Agropecuaria, Estación Experimental Agropecuaria Rafaela, Santa Fe, Argentina
| | - Lorenza Beati
- U. S. National Tick Collection, Institute for Coastal Plain Science, Georgia Southern University, Statesboro, GA 30460 USA
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7
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Saito TB, Bechelli J, Smalley C, Karim S, Walker DH. Vector Tick Transmission Model of Spotted Fever Rickettsiosis. THE AMERICAN JOURNAL OF PATHOLOGY 2018; 189:115-123. [PMID: 30315767 DOI: 10.1016/j.ajpath.2018.09.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Revised: 09/06/2018] [Accepted: 09/10/2018] [Indexed: 12/13/2022]
Abstract
Many aspects of rickettsial infections have been characterized, including pathogenic and immune pathways and mechanisms of rickettsial survival within the vertebrate host and tick vector. However, very few studies are focused on the complex pathogen-vector-host interactions during tick feeding. Therefore, our objective was to develop a tick transmission model of the spotted fever group of rickettsial infections to study the initial events in disease development. The most appropriate strain of mouse was identified for evaluation as a transmission model, and the course of infection, bacterial levels, histopathologic changes, and antibody response during tick transmission in mice infested with Amblyomma maculatum ticks carrying the emerging pathogen, Rickettia parkeri, were studied. Results showed distinct clinical signs in C3H/HeN mice infected intravenously, leading to selection of this mouse strain for tick transmission studies. Active infection of animals was observed after tick vector transmission. The bacteria disseminated systemically and spread to several organs at 24 hours after tick attachment, with peak bacterial load at day 6 after tick attachment. Skin, lung, and liver showed the greatest pathologic changes, with inflammatory cellular infiltration and necrosis. These findings indicate the feasibility of using murine infection with R. parkeri by A. maculatum tick transmission as a model to study different aspects of the spotted fever group of rickettsial disease establishment.
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Affiliation(s)
- Tais B Saito
- Department of Pathology, University of Texas Medical Branch at Galveston, Galveston, Texas.
| | - Jeremy Bechelli
- Department of Pathology, University of Texas Medical Branch at Galveston, Galveston, Texas
| | - Claire Smalley
- Department of Pathology, University of Texas Medical Branch at Galveston, Galveston, Texas
| | - Shahid Karim
- Department of Biological Sciences, University of Southern Mississippi, Hattiesburg, Mississippi
| | - David H Walker
- Department of Pathology, University of Texas Medical Branch at Galveston, Galveston, Texas
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8
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Faccini-Martínez ÁA, Félix ML, Armua-Fernandez MT, Venzal JM. An autochthonous confirmed case of Rickettsia parkeri rickettsiosis in Uruguay. Ticks Tick Borne Dis 2018; 9:718-719. [PMID: 29483057 DOI: 10.1016/j.ttbdis.2018.02.015] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Revised: 02/14/2018] [Accepted: 02/14/2018] [Indexed: 11/15/2022]
Abstract
Rickettsia parkeri, a member of the spotted fever group (SFG) rickettsiae, was first confirmed as an etiological agent of human rickettsiosis in 2004. Nearly all cases are characterized by an inoculation eschar, and no fatalities have been reported. In Uruguay, probable human cases of R. parkeri infection (confused initially with R. conorii infection) have been described since 1990 using the clinical name "cutaneous-ganglionar" rickettsiosis. This is the only tick-borne rickettsiosis reported in the country. A single case of R. parkeri rickettsiosis has been confirmed by molecular and serological testing in a Spanish traveler returning from Uruguay. We report the first autochthonous human R. parkeri infection, confirmed by molecular testing in Uruguay.
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Affiliation(s)
- Álvaro A Faccini-Martínez
- Postgraduate Program in Infectious Diseases, Health Science Center, Universidade Federal do Espírito Santo, Vitória, ES, Brazil; Committee of Tropical Medicine, Zoonoses and Travel Medicine, Asociación Colombiana de Infectología, Bogotá, Colombia.
| | - María L Félix
- Laboratorio de Vectores y enfermedades transmitidas, CENUR Litoral Norte - Salto, Universidad de la República, Rivera 1350, Salto, CP 50000, Uruguay
| | - María T Armua-Fernandez
- Laboratorio de Vectores y enfermedades transmitidas, CENUR Litoral Norte - Salto, Universidad de la República, Rivera 1350, Salto, CP 50000, Uruguay
| | - José M Venzal
- Laboratorio de Vectores y enfermedades transmitidas, CENUR Litoral Norte - Salto, Universidad de la República, Rivera 1350, Salto, CP 50000, Uruguay
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Dall'Agnol B, Souza UA, Weck B, Trigo TC, Jardim MMA, Costa F, Labruna MB, Peters FB, Favarini MO, Mazim FD, Ferreira CAS, Reck J. Rickettsia parkeri
in free-ranging wild canids from Brazilian Pampa. Transbound Emerg Dis 2017; 65:e224-e230. [DOI: 10.1111/tbed.12743] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2017] [Indexed: 12/01/2022]
Affiliation(s)
- B. Dall'Agnol
- Instituto de Pesquisas Veterinárias Desidério Finamor (IPVDF); Eldorado do Sul RS Brazil
- Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS); Porto Alegre RS Brazil
| | - U. A. Souza
- Instituto de Pesquisas Veterinárias Desidério Finamor (IPVDF); Eldorado do Sul RS Brazil
| | - B. Weck
- Instituto de Pesquisas Veterinárias Desidério Finamor (IPVDF); Eldorado do Sul RS Brazil
| | - T. C. Trigo
- Fundação Zoobotânica do Rio Grande do Sul (FZB-RS); Porto Alegre RS Brazil
| | - M. M. A. Jardim
- Fundação Zoobotânica do Rio Grande do Sul (FZB-RS); Porto Alegre RS Brazil
| | - F. B. Costa
- Universidade de São Paulo (USP); São Paulo SP Brazil
| | - M. B. Labruna
- Universidade de São Paulo (USP); São Paulo SP Brazil
| | - F. B. Peters
- Área de Vida Assessoria e Consultoria em Biologia e Meio Ambiente; Canoas RS Brazil
| | - M. O. Favarini
- Área de Vida Assessoria e Consultoria em Biologia e Meio Ambiente; Canoas RS Brazil
| | - F. D. Mazim
- Ka'aguy Consultoria Ambiental; Pelotas RS Brazil
| | - C. A. S. Ferreira
- Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS); Porto Alegre RS Brazil
| | - J. Reck
- Instituto de Pesquisas Veterinárias Desidério Finamor (IPVDF); Eldorado do Sul RS Brazil
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Comparative analysis of germ cells and DNA of the genus Amblyomma: adding new data on Amblyomma maculatum and Amblyomma ovale species (Acari: Ixodidae). Parasitol Res 2017; 116:2883-2892. [PMID: 28821960 DOI: 10.1007/s00436-017-5592-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Accepted: 08/10/2017] [Indexed: 12/19/2022]
Abstract
Among tick species, members of the subfamily Amblyomminae have received special attention, since they serve as vectors for pathogens such as Rickettsia spp. and display cryptic species complexes that make their taxonomical classification challenging. Amblyomma ovale, Amblyomma maculatum, and other species of the genus Amblyomma have shown a long history of taxonomic controversies. Spermiotaxonomy has proved to be a valuable tool in the solution of systematic conflicts in Metazoa that can aid molecular and external morphological analyses in ticks and, overall, provide more robust analyses and results. With this in mind, this study included histological analyses of the reproductive system of the species A. ovale and A. maculatum, as well as the description of morphohistological characters of the male reproductive system of ticks of the genus Amblyomma, in order to evaluate these characters within the current clustering proposals. In addition, 16S rDNA and COI (mitochondrial) molecular markers were used to study the genetic relationships of the species. The results show that the tick male reproductive system and its germ cells contain useful candidate characters for taxonomical analyses of Ixodida.
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Herrick KL, Pena SA, Yaglom HD, Layton BJ, Moors A, Loftis AD, Condit ME, Singleton J, Kato CY, Denison AM, Ng D, Mertins JW, Paddock CD. Rickettsia parkeri Rickettsiosis, Arizona, USA. Emerg Infect Dis 2016; 22:780-5. [PMID: 27089251 PMCID: PMC4861524 DOI: 10.3201/eid2205.151824] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
In the United States, all previously reported cases of Rickettsia parkeri rickettsiosis have been linked to transmission by the Gulf Coast tick (Amblyomma maculatum). Here we describe 1 confirmed and 1 probable case of R. parkeri rickettsiosis acquired in a mountainous region of southern Arizona, well beyond the recognized geographic range of A. maculatum ticks. The likely vector for these 2 infections was identified as the Amblyomma triste tick, a Neotropical species only recently recognized in the United States. Identification of R. parkeri rickettsiosis in southern Arizona demonstrates a need for local ecologic and epidemiologic assessments to better understand geographic distribution and define public health risk. Education and outreach aimed at persons recreating or working in this region of southern Arizona would improve awareness and promote prevention of tickborne rickettsioses.
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12
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Moreira-Soto A, Carranza MV, Taylor L, Calderón-Arguedas O, Hun L, Troyo A. Exposure of dogs to spotted fever group rickettsiae in urban sites associated with human rickettsioses in Costa Rica. Ticks Tick Borne Dis 2016; 7:748-753. [DOI: 10.1016/j.ttbdis.2016.03.007] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2015] [Revised: 03/07/2016] [Accepted: 03/09/2016] [Indexed: 11/25/2022]
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