Further studies on transmission of African horse-sickness disease in Egypt

8y using Indirect Fluorescent Antibody Technique,african horse-sickness virus was detected in both the salivary gland and haemolymphs of the experimen-tally infected females and males tick Hyalomma dromadarii but not detected in their faescesInvestigation of new arthropode samples collected fromdifferent animals in Aswan Province revealed that 29ticks (6.6~) merely proved to be a positive vector inharbouring the virus in their salivary gland and succe-ssful isolation of a new viral agent from camel tick Hyalomma dromadarii sample No.23, identified and typedas horse-sickness virus type 9 using complement fixation test, agar gel precipitation test passive haemagglutiontest and serum-neutralization test.The role of Hyalomma dromadarii of camel’s in trans-mission of african horse-sickness was studied in details.Results showed that ticks could play a vector role in transmitting the virus from horse to camel and from camelto horse.African horse-sickness virus was transmitted transstadien- ally through the different developmental stages of tick.