الملخص
Effect of nematode Ascaridia galli on chicken was studied in experiments involving 120 [60 Hypeco breed and 60 Fayoumi breed] to observe the impact of worm infection on productive and economic characters in the country. The chickens used in the experiment ranging from one to 90 days old. Each chick was experimentally infected with embryonated Ascaridia galli eggs at different ages. The blood of each chicken was weighted, also slaughtered chick, feathers, dressed carcass, eviscerated carcass, edible, non-edible parts, liver, head and shanks and net weight were calculated. The economic evaluation of local and foreign poultry breeds in meat production and feed consumption indicated that the losses due to Ascaridia galli infection in Hypeco and Fayoumi breeds were estimated to be about 215.24 and 75.21 thousand Egyptian pounds/year due to meat and food losses, respectively. The losses of meat and ration due to infection with Ascaridia galli were more in case of foreign breed [Hypeco] than those in case of Egyptian ones [Fayoumi] which call for special attention for broiler industry