Detection of Leishmania infantum in Rhipicephalus sanguineus ticks from Brazil and Italy (original) (raw)

Abstract

Canine leishmaniosis is a widespread disease caused by Leishmania parasites, which are transmitted by phlebotomine sand flies. However, in some areas where canine leishmaniosis is endemic, but the primary vectors have not been found, ticks have been suspected to play a role in transmitting the infection. Herewith, we report the detection of Leishmania infantum kinetoplast minicircle DNA (kDNA) in ticks collected from naturally infected dogs living in rural areas of Southern Italy (site A) and Northeastern Brazil (site B). Between March and October 2007, ticks were collected from 26 dogs positive to anti-Leishmania antibodies (one from site A and 25 from site B) and either placed directly into vials containing 70% ethanol or maintained alive for identification and subsequent dissection. All the 95 ticks collected were morphologically identified as Rhipicephalus sanguineus. After identification, their genomic DNA was extracted (either individually or in pools) and processed by polymerase chain reaction (PCR) for the detection of L. infantum kDNA. Two pools of salivary glands from ticks (one from five females and other from five males) found on a dog from site A and tested by a conventional PCR were positive. Amplicon sequencing confirmed the identity of the parasite. In addition, nine (12.3%) out of the 73 ticks found on dogs from site B and tested by a real-time PCR were positive, with a low parasite load (less than 1 parasite/ml). The retrieval of L. infantum kDNA in salivary glands of R. sanguineus ticks has been here reported for the first time. Therefore, further studies are needed to assess the competence of ticks as vectors of Leishmania parasites from dog to dog.

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Acknowledgments

The authors are grateful to the Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq; grant 410481/2006-8) and the Fundação de Amparo à Ciência e Tecnologia do Estado de Pernambuco (FACEPE; grant APq-00522.02/07) for financial support.

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Authors and Affiliations

  1. Dipartimento di Sanità Pubblica e Zootecnia, Università degli Studi di Bari, Valenzano, BA, Italy
    Filipe Dantas-Torres, Vincenzo Lorusso, Gabriella Testini, Luciana A. Figueredo & Domenico Otranto
  2. Departamento de Imunologia, Centro de Pesquisas Aggeu Magalhães, Fundação Oswaldo Cruz, Recife, PE, Brazil
    Milena de Paiva-Cavalcanti & Sinval P. Brandão-Filho
  3. Bayer Health Care AG, Animal Health Division, Leverkusen, Germany
    Dorothee Stanneck & Norbert Mencke
  4. Departamento de Medicina Veterinária, Universidade Federal Rural de Pernambuco, Recife, PE, Brazil
    Leucio C. Alves

Authors

  1. Filipe Dantas-Torres
  2. Vincenzo Lorusso
  3. Gabriella Testini
  4. Milena de Paiva-Cavalcanti
  5. Luciana A. Figueredo
  6. Dorothee Stanneck
  7. Norbert Mencke
  8. Sinval P. Brandão-Filho
  9. Leucio C. Alves
  10. Domenico Otranto

Corresponding author

Correspondence toFilipe Dantas-Torres.

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Dantas-Torres, F., Lorusso, V., Testini, G. et al. Detection of Leishmania infantum in Rhipicephalus sanguineus ticks from Brazil and Italy.Parasitol Res 106, 857–860 (2010). https://doi.org/10.1007/s00436-010-1722-4

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