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Study on morphology, pathogenicity, and genetic variability of Beauveria bassiana isolates obtained from Boophilus microplus tick

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Abstract

Fifty isolates of Beauveria bassiana (Balsamo) Vuillemin, 1912 (Ascomycota: Clavicipitaceae) were analyzed by morphology, for their pathogenic potential to Boophilus microplus (Canestrini, 1887) (Acari: Ixodidae) larvae, and by Random Amplified Polymorphic DNA-Polymerase Chain Reaction technique. Morphological analysis demonstrated that isolates present characteristics compatible to those described for B. bassiana in the literature. Virulence test demonstrated that all isolates present lethal effect on larvae and that the lethal concentration varies among isolates. The most virulent isolate was the only one obtained from human infection, which was also the only isolate presenting synnemata. The study on genetic variability among the isolates allowed the identification of 23 electrophoretic profiles. The established groupings suggest that most of the isolates obtained from B. microplus of the same locality present low genetic variation. In this way, the data in the present study will contribute to a meticulous characterization of these B. bassiana isolates.

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Acknowledgements

This study was supported by grants from CAPES (Coordenação de Aperfeiçoamento de Pessoa de Nível Superior) and FAPERJ (Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro).

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Authors and Affiliations

  1. Department of Animal Parasitology, Veterinary Institute, Federal Rural University of Rio de Janeiro–UFFRJ, Seropédica–RJ, Brazil

    Everton Kort Kamp Fernandes & Vânia Rita Elias Pinheiro Bittencourt

  2. Department of Mycology, Oswaldo Cruz Institute—FIOCRUZ, Pav. Leônidas Deane, 6° andar-sala 606. Av. Brasil, 4365, 21045-900, Manguinhos-Rio de Janeiro-RJ, Brazil

    Gisela Lara Costa & Áurea Maria Lage Moraes

  3. Department of Biochemistry and Molecular Biology, Oswaldo Cruz Institute—FIOCRUZ, Rio de Janeiro-RJ, Brazil

    Viviane Zahner

Authors
  1. Everton Kort Kamp Fernandes
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  2. Gisela Lara Costa
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  3. Áurea Maria Lage Moraes
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  4. Viviane Zahner
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  5. Vânia Rita Elias Pinheiro Bittencourt
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Correspondence to Áurea Maria Lage Moraes.

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Fernandes, E.K.K., Costa, G.L., Moraes, Á.M.L. et al. Study on morphology, pathogenicity, and genetic variability of Beauveria bassiana isolates obtained from Boophilus microplus tick. Parasitol Res 98, 324–332 (2006). https://doi.org/10.1007/s00436-005-0058-y

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  • DOI: https://doi.org/10.1007/s00436-005-0058-y

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