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Applied and Environmental Microbiology, July 2009, p. 4627-4629, Vol. 75, No. 13
0099-2240/09/$08.00+0     doi:10.1128/AEM.00221-09
Copyright © 2009, American Society for Microbiology. All Rights Reserved.

PirAB Toxin from Photorhabdus asymbiotica as a Larvicide against Dengue Vectors{triangledown}

Arunee Ahantarig,1,2 Nantarat Chantawat,1,2 Nicholas R. Waterfield,3 Richard ffrench-Constant,4 and Pattamaporn Kittayapong1,2*

Center of Excellence for Vectors and Vector-Borne Diseases, Faculty of Science, Mahidol University at Salaya, Phutthamonthon 4 Road, Nakhon Pathom 73170, Thailand,1 Department of Biology, Faculty of Science, Mahidol University, Rama 6 Road, Bangkok 10400, Thailand,2 Department of Biology and Biochemistry, University of Bath, Bath BA2 7AY, United Kingdom,3 Centre for Ecology and Conservation, University of Exeter, Penryn, Cornwall TR10 9EZ, United Kingdom4

Received 30 January 2009/ Accepted 30 April 2009

We have evaluated Photorhabdus insect-related protein (Pir) from Photorhabdus asymbiotica against dengue vectors. PirAB shows larvicidal activity against both Aedes aegypti and Aedes albopictus larvae but did not affect the Mesocyclops thermocyclopoides predator. PirAB expressed the strongest toxicity compared to PirA, PirB, or the mixture of PirA plus PirB. Whether the presence of an enterobacterial repetitive intergenic consensus sequence in PirAB, but not in PirA, PirB, or the mixture of PirA plus PirB, has any impact on biological control efficacy needs further investigation.

* Corresponding author. Mailing address: Center of Excellence for Vectors and Vector-Borne Diseases, Faculty of Science, Mahidol University at Salaya, Phutthamonthon 4 Road, Nakhon Pathom 73170, Thailand. Phone: 662 201 5922. Fax: 662 201 5923. E-mail: grpkt{at}mahidol.ac.th

{triangledown} Published ahead of print on 8 May 2009.

Applied and Environmental Microbiology, July 2009, p. 4627-4629, Vol. 75, No. 13
0099-2240/09/$08.00+0     doi:10.1128/AEM.00221-09
Copyright © 2009, American Society for Microbiology. All Rights Reserved.





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