Rhipicephalus (Boophilus) microplus (Acari: Ixodidae) resistance to fipronil in Uruguay evaluated by in vitro bioassays
Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
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Data(s) |
20/10/2012
20/10/2012
2010
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Resumo |
Rhipicephalus (Boophilus) microplus obtained from four local populations in Uruguay (2007-2008) were subjected to various bioassay techniques to determine the presence of fipronil resistance within the country. Resistance ratios (RRs) obtained by larval immersion test varied between 3.3 and 3635 for tick populations subjected to treatment with fipronil for the last 3-7 years. The highest RR was observed in the population which received fewer treatments. Using discriminating concentration (8 ppm) for larval immersion test, all field strains were correctly diagnosed as fipronil-resistant. This study presents the first diagnoses of cattle tick resistance to fipronil in Uruguay`s field populations. It also highlights the importance of the possible conflict between programs to control agricultural pests and cattle ticks. The findings provide valuable information for selection and adoption of new control alternatives to manage drug resistance exhibited by cattle ticks. (C) 2009 Elsevier BM. All rights reserved. MEC-PDT (Uruguay) MEC-PDT (Uruguay) INIA-FPTA[243] INIA-FPTA FAPESP (Brazil) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) |
Identificador |
VETERINARY PARASITOLOGY, v.169, n.1/Fev, p.172-177, 2010 0304-4017 http://producao.usp.br/handle/BDPI/31080 10.1016/j.vetpar.2009.12.017 |
Idioma(s) |
eng |
Publicador |
ELSEVIER SCIENCE BV |
Relação |
Veterinary Parasitology |
Direitos |
restrictedAccess Copyright ELSEVIER SCIENCE BV |
Palavras-Chave | #Rhipicephalus (Boophilus) microplus #Fipronil #Acaricide #Resistance tests #GATED CHLORIDE CHANNEL #PHENYLPYRAZOLE INSECTICIDES #BRAZIL #TESTS #Parasitology #Veterinary Sciences |
Tipo |
article original article publishedVersion |