الفهرس 
AetiologyOnly 14 pages are availabe for public view
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Abstract
The present study was carried out for the detection frequency of RVFV IgG in animals and man and to investigate the occurrence of RVFV in mosquitoes. A total of 460 animal blood samples were collected from sheep 172, goats 48, cattle 164 and buffaloes 76 from different animal farms, sheep flocks , private animals and abattoirs from El Menoufia, El Behera and Kafr El Sheikh Governorates. All animal blood samples were examined by ELISA test and it was found that Kafr El sheikh had the higher percentage than the two other Governorates 21.4 %. Also sheep and goat represented the most principle host to RVF by 21.4 and 18.7 % specially on the age group > 3- 5 years by 17.9% . It was found that females had the higher percentage than males by a percentage of 17.7 and 8.6%, respectively. from the study it was proved that RVF play an important role in abortions specially in sheep and goats. In human, a total of 369 human blood samples were collected from fever hospitals, private clinics and laboratories found in the three Governorates. It was found that males that contact with animals such as sheepherders, farmers and butchers constituted the higher percentage than females by a percentage of 12.8% specially in the age group 30-45 years by a percentage of 16.6% especially persons lived in rural areas. This study proved that animal had an important role in transmission of disease to man . Atotal of 872 mosquitoes were collected by using CDC light trap and identified into 32 mosquito pool according to genus (Culex, Aedes and Anopheles) and the culex constituted the higher percentages of 71.8%. All mosquito samples were did not any band at the expected size 342 bp by RT- PCR . This negative result did not mean that virus completely absent as might be present in a low level in the study area or might be present in other Governorates in Egypt.