Mechanism of resistance to synthetic pyrethroids in buffalo flies in south east Queensland

Rothwell, J. T., Morgan, J. A. T., James, P. J., Brown, G. W., Guerrero, F. D. and Jorgensen, W. K . (2009). Mechanism of resistance to synthetic pyrethroids in buffalo flies in south east Queensland. In: Proceedings of: 2009 ASP & ARC/NHMRC Research Network for Parasitology Annual Conference. 2009 ASP & ARC/NHMRC Research Network for Parasitology Annual Conference, Sydney, NSW, Australia, (92-92). 12-15 July 2009.


Author Rothwell, J. T.
Morgan, J. A. T.
James, P. J.
Brown, G. W.
Guerrero, F. D.
Jorgensen, W. K .
Title of paper Mechanism of resistance to synthetic pyrethroids in buffalo flies in south east Queensland
Conference name 2009 ASP & ARC/NHMRC Research Network for Parasitology Annual Conference
Conference location Sydney, NSW, Australia
Conference dates 12-15 July 2009
Proceedings title Proceedings of: 2009 ASP & ARC/NHMRC Research Network for Parasitology Annual Conference
Publication Year 2009
ISBN not found
Start page 92
End page 92
Total pages 1
Language eng
Formatted Abstract/Summary
Buffalo fly (Haematobia irritans exigua) and horn fly (Haematobia irritans irritans) cause irritation and production loss in much of the cattle producing area of the world. These two species are closely related and in Australia losses from buffalo fly were recently estimated at A$78m per year. Buffalo fly control is largely performed by using organophosphate(OP)/carbamate, synthetic pyrethroid(SP) and macrocyclic lactone insecticides formulated for topical use. In Australia buffalo fly resistance to SPs was first recorded in 1980. Resistant flies were 45 times less sensitive to the SP fenvalerate than susceptible flies and 29 x less susceptible to the SP cypermethrin. By the 1990s resistance to the SPs was widespread in populations from coastal northeastern Australia. Resistance in American horn flies was found to be associated with specific mutations in the gene coding for the sodium channel protein, the target of SP activity. Our study assessed resistance to SPs at the University of Queensland, Pinjarra Hills farm and investigated whether SP resistance-associated sodium channel gene mutations were present in buffalo fly. We used a PCR assay developed to detect the SP resistance-associated gene mutations in the horn fly to assay for these gene mutations in buffalo fly. The kdr sodium channel gene mutation was found in the buffalo fly, however, the super-kdr mutation was not detected in this buffalo fly population.
Subjects 1108 Medical Microbiology
0603 Evolutionary Biology
0707 Veterinary Sciences
Q-Index Code EX
Q-Index Status Provisional Code
Institutional Status UQ
Additional Notes Source not located.

 
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Created: Thu, 11 Nov 2010, 12:20:45 EST by Jon Swabey on behalf of Faculty Of Nat Resources, Agric & Veterinary Sc