Monitoring of Insecticide Resistance of Anopheles arabiensis Patton to DDT 4%, Deltamethrin 0.05%, Permethrin 0.75% and Bendiocarb 0.1% In River Nile State, Sudan, 2015

The study purposed to determine insecticide susceptibility status of An. arabiensis in the three sites in River Nile Stateof Sudan to DDT 4%, Deltamethrin 0.05%, Permethrin 0.75% and Bendiocarb 0.1%. The insecticide susceptibilitytests were implemented using the WHO standard procedure under optimum conditions and by using impregnatedpapers with recommended diagnostic concentrations. The tests done with three days-old An. arabiensis non-blood fedfemales. One hundred twenty to one hundred fifty females were tested for each insecticide at the diagnostic concentrationwith 6 replicates of 20 - 25 mosquitoes per test. Control tests consisted of groups of 50 female mosquitoes exposedto papers impregnated with carrier oil without insecticide under the same conditions. The exposure time was onehour; then mosquitoes were transferred into holding tubes for a 24 hours' recovery period after that the mortalityrecorded. Results revealed that An. arabiensis was susceptible to Bendiocarb with 100% mortality rate in all threesites in River Nile state; Shendi, Alzidab and Al Bawga. Anophele sarabiensis was also susceptible to Deltamethrinin Al zidab (98.8%), Al bawga (98.7%) and resistant in Shendi (81.2%). Anopheles arabiensis showed resistance toPermethrin and DDT in all three sites with mortality rates ranged 31.4% - 80.1%. For Bendiocarb KDT50 rangedbetween 18.1 - 38.5 minutes, while KDT95 ranged between 30.6 –94.7 minutes. The fastest KDT50 and KDT95recorded were in Shendi area. Whereas for Deltamethrin KDT50 ranged between20.5 – 24.2 minutes, while KDT95ranged between 90.6 – 132.2 minutes. The fastest KDT50 and KDT95 recorded was in Albawga. These results shouldbe taken in consideration by the current vector control interventions in River Nile State.