Studies on Aedes AegyptI resistance to some insecticides in the Jazan district, Saudi Arabia

The present study provided information on the susceptibility status of the adult and larvae of Aedes aegypti mosquitoes in Jazan region of Saudi Arabia. Bioassay tests were performed on adults and larvae by using WHO recommended concentrations and test kits. Adults of Ae. aegypti mosquitoes were exposed to test papers impregnated with Lambda-cyhalothrin [0.05%], Cyfluthrin [0.15%], Deltamethrin [0.05%], Permethrin [0.75%], Fenitrothion [1%], Bendiocarb [0.1%] and DDT [4%] insecticides. Ae. aegypti mosquitoes were found to be susceptible only to Cyfluthrin; [mortality rate was 100%], whereas variable resistances were observed from the rest of the other insecticides tested [mortality rates ranged between 93.6 and 17%]. Larvae were subjected to different concentrations of Diflubenzuron, Methoprene [IGRs] and Temephos [Organophosphate]. Adult emergence inhibition [IE50 and IE95] values for the IGRs and the [LC[50] and LC[95]] for Temephos were determined by log-probit regression analysis. Ae. aegypti larvae were resistant to Temephos [LC[50] 61.8 - LC[95] 35600.1 mg/l] and showed high susceptibility to Methoprene than Diflubenzuron [IE[50] 0.49 - IE[95] 10.9 mg/l] and [IE[50] 0.86 and IE[95] 93.8 mg/l], respectively. Larvae were more susceptible to Methoprene than Diflubenzuron by 1.8 folds

Sarcosporidiosis among Egyptian buffaloes

A total of 4000 samples were collected from buffalo carcasses, each from the left ventricle of the heart, esophagus and the t and inous insertion of the diaphragmatic pillars. Samples were subjected to macro- and microscopical examinations. Sarcocysts were found in 773 out of 2000 [38.65%] male carcasses under 2 years, 2 out of 3 [66.66%] female carcasses under 2 years and 1839 out of 1997 [92.08%] female carcasses over 5 years. Macrocysts were not found in the heart samples, while 36% 84% of the diaphragmatic and esophageal samples were infected. Microcysts were found in 62%, 77% and 98% of heart, diaphragmatic and esophageal samples. The degree of infection among the examined samples were mentioned