14
views
0
recommends
+1 Recommend
1 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: found
      Is Open Access

      Trombiculiasis in domestic goats and humans in the state of Maranhão, Brazil Translated title: Trombiculíase em caprinos domésticos e humanos no Estado do Maranhão, Brasil

      Read this article at

      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          Abstract Trombiculiasis is an infestation caused by larval mites (chiggers) of the family Trombiculidae. Here, we provide the first report on parasitism by the chigger species Eutrombicula alfreddugesi (Oudemans) and Eutrombicula batatas (Linnaeus) in goats and humans on farms in the state of Maranhão, northeastern Brazil. Severe itching and dermatitis caused by the chiggers' bites were seen. From a total of 779 examined goats, 214 of them showed clinical signs of infestation, as well as family members of three farms of the region. Most of the cases occurred during the rainy season, from March to September.

          Translated abstract

          Resumo Trombiculíase é uma infestação causada por larvas de ácaros da família Trombiculidae. Nós reportamos pela primeira vez parasitismo por ácaros das espécies Eutrombicula alfreddugesi (Oudemans) and Eutrombicula batatas (Linnaeus) em cabras e humanos em fazendas no estado do Maranhão, nordeste do Brasil. Foram observadas dermatite e coceiras severas causadas pelas picadas de trombiculídeos. De um total de 779 cabras examinadas, 214 delas apresentaram sinais clínicos de infestações, assim como membros de três famílias de fazendeiros da região. A maioria dos casos ocorreu durante a estação chuvosa, de março a setembro.

          Related collections

          Most cited references 38

          • Record: found
          • Abstract: found
          • Article: not found

          Neotrombicula autumnalis (Acari, Trombiculidae) as a vector for Borrelia burgdorferi S.L.?

          Larvae of the trombiculid mite Neotrombicula autumnalis were collected at 18 sites in and around Bonn, Germany, to be screened for infection with Borrelia burgdorferi s.l. by means of PCR. Questing larvae numbering 1380 were derived from the vegetation and 634 feeding ones were removed from 100 trapped micromammals including voles, mice, shrews and hedgehogs. In a laboratory infection experiment, a further 305 host-seeking larvae from the field were transferred onto Borrelia-positive mice and gerbils, and examined for spirochete infection at various intervals after repletion. In three cases borrelial DNA could be amplified from the mites: (1) from a larva feeding on a wild-caught greater white-toothed shrew (Crocidura russula), (2) from a pool of four larvae feeding on a B. garinii-positive laboratory mouse, and (3) from a nymph that had fed on a B. afzelii-positive laboratory gerbil as a larva. In the first case, borrelial species determination by DNA hybridization of the PCR product was only possible with a B. burgdorferi complex-specific probe but not with a species-specific one. In the second case, probing showed the same borrelial genospecies (B. garinii) as the laboratory host had been infected with. In the latter case, however, DNA hybridization demonstrated B. valaisiana while the laboratory host had been infected with B. afzelii. Subsequent DNA sequencing confirmed much higher similarity of the PCR product to B. valaisiana than to B. afzelii indicating an infection of the mite prior to feeding on the laboratory host. The negligible percentage of positive mites found in this study suggests that either the uptake of borrelial cells by feeding trombiculids is an extremely rare event or that ingested spirochetes are rapidly digested. On the other hand, the results imply a possible transstadial and transovarial transmission of borreliae once they are established in their trombiculid host. However, unless the transmission of borreliae to a given host is demonstrated, a final statement on the vector competence of trombiculid mites is not possible.
            Bookmark
            • Record: found
            • Abstract: found
            • Article: not found

            Molecular detection of Ehrlichia phagocytophila genogroup organisms in larvae of Neotrombicula autumnalis (Acari: Trombiculidae) captured in Spain.

            Twenty unfed larvae of Neotrombicula autumnalis (Acari: Trombiculidae) collected on vegetation in the north of Spain were examined by polymerase chain reaction for Borrelia burgdorferi (s.l.). rickettsiae, and the Ehrlichia phagocytophila genogroup. At least 10% of the larvae were found to contain granulocytic ehrlichiae. Because the larvae were unfed, they would necessarily have inherited the bacteria through a transovarian transmission pathway.
              Bookmark
              • Record: found
              • Abstract: not found
              • Article: not found

              The Penetration of the host tissue by the harvest mite, Trombicula Autumnalis shaw

               B Jones (1950)
                Bookmark

                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                rbpv
                Revista Brasileira de Parasitologia Veterinária
                Rev. Bras. Parasitol. Vet.
                Colégio Brasileiro de Parasitologia Veterinária (Jaboticabal, SP, Brazil )
                0103-846X
                1984-2961
                March 2017
                : 26
                : 1
                : 104-109
                Affiliations
                São Luís Maranhão orgnameUniversidade Estadual do Maranhão orgdiv1Unidade de Medicina Veterinária Brazil
                Recife Pernambuco orgnameUniversidade Federal Rural de Pernambuco orgdiv1Laboratório de Bacterioses dos Animais Domésticos Brazil
                São Paulo São Paulo orgnameInstituto Butantan orgdiv1Laboratório Especial de Coleções Zoológicas Brazil
                São Paulo São Paulo orgnameInstituto Butantan orgdiv1Laboratório de Parasitologia Brazil
                Seropédica Rio de Janeiro orgnameUniversidade Federal Rural do Rio de Janeiro orgdiv1Departamento de Parasitologia Animal Brazil
                Article
                S1984-29612017000100104
                10.1590/s1984-29612016088

                This work is licensed under a Creative Commons Attribution 4.0 International License.

                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 30, Pages: 6
                Product
                Product Information: website

                Comments

                Comment on this article