SEROLOGICAL STUDY OF AVIAN ENCEPHALOMYELITIS IN LAYING HENS AND ECONOMIC IMPACT OF VACCINATION IN ALGERIA

摘要

To determine if AE virus disease in laying hen farms in Algeria and to know the economic impact of vaccination, During the period from May 2014 to June 2015 ,sixteen farms with history of lowered egg productivity. 480 serums samples were tested for antibodies using commercial (Elisa) kits. For statistical analysis, Mann-Whitney test was for economic analysis, costs-benefits. Serological results revealed a percentage of 81.25% of positive seroconversion. At 5% degree of significance, economic analysis showed that vaccination against AE virus engenders economic benefits.