RESUMEN
Swollen Head Syndrome [SHS] affects both broiler and broiler breaders and has become a problem in many countries. Clinical signs similar to those described in SHS conditions have been recorded in Egypt. The disease was recorded in difference ages and different breeds including native breed that showing respiratory manifestations, mortality and low, egg production. 375 serum samples from 15 farms that showing respiratory manifestations, mortality and low egg production were examined for the presence of antibodies against SHS virus using Enzyme linked Immunosorbent Assay [ELISA] based on two different types of antigen strain British and French antigens. Antibodies were detected in 14 farms but not in one farm. The results obtained from testing with two different types of ELISA kits showed no statistical significant difference