ABSTRACT
Laboratory diagnosis of CCHF by complement fixation test [CFT] was used in 441 human blood samples from 18 provinces of Iraq during the period of 36 months. 102 samples were taken from patients provisionally diagnosed as CCHF while the other number of samples were taken from the contact persons. 54 samples were positive[55%]and 365 animals blood samples were examined from different province the number of positive samples cases was 39 samples. [10.6%] Antamologic study revealed that hyalemma anatollucum, antolicum was the vector. The age incidence range from 15-40 year, no significant difference between male and female, the peak seasonal incidence was in June up to September, no pediatric cases were detected. No positive sample among the contacts [close contact to the patient]. This study disclosed the laboratory diagnosis using serological test, CFT may help in reaching the clinical diagnosis of CCHF of can be used as a good epidemiological tool and as screening test to detect the prevalence of antibodies among the clinical cases and the contact