Susceptibility of dangerous scorpions of Hormozgan province to WHO recommended insecticides


Kourosh Azizi 1 , * , Abouzar Soltani 1 , Abbas Poudat 1 , Mehran Shahi 1

1 Infectious Diseases Research Center, Hormozgan University of Medical Sciences, Bandar Abbas, Iran.

How to Cite: Azizi K, Soltani A, Poudat A, Shahi M. Susceptibility of dangerous scorpions of Hormozgan province to WHO recommended insecticides, Hormozgan Med J. 2010 ; 14(1):e88530.


Hormozgan Medical Journal: 14 (1); e88530
Published Online: October 31, 2009
Article Type: Research Article
Received: May 24, 2009
Accepted: October 31, 2009


Introduction: Hormozgan province is the second most important foci of scorpion
stinging specially by Hemiscorpius lepturus. Currently chemical control is the most
efficient way and susceptibility level of important vectors should be chequed to find
their resistance to some chemicals. Our aim was to investigate on the susceptibility
or resistance of the most dangerous scorpions of Hormozgan province to the WHO
recommended insecticides.
Methods: In this cross-sectional study, 843 specimens of Scorpio were captured.
Susceptibility tests were achieved using the method of Cockroaches, susceptibility. Each
dose of insecticides was tested in two replicates and killing dose of each specimen was
Results: Killing dose of Cypermethrin (EC 2.5%) was 0.001 μl/cm2 for Mesobuthus
eupeus, H. lepturus and Odontobuthus doriae and was 0.009 μl/cm2 for Androctonus
crassicauda. That dose was calculated as 0.001 and 0.0003 μl/cm2 for M. eupeus and H.
lepturus, respectively, for Deltamethrin (EC 2.5 %). All species were killed at dose of
0.39 mg/cm2 for Carbaryl (WP 85%). None of Lindane doses (WP 25%) could make
100% mortality in all species. Mortal dose of Malathion (EC 57%) was 1.029 μl/cm2 for
A. crassicauda and H. lepturus and 0.284 μl/cm2, and 0.515 μl/cm2 for M. eupeus and O.
doriae, respectively.
Conclusion: The studied scorpion species were susceptible to the Pyrethroids. These
insecticides can be used in an “Integrated Vector Management” program to control
Malaria and scorpions. These species probably are resistance to Malathion and Lindane.



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