Chicken anaemia virus outbreak in chickens in Saudi Arabia

In a poultry located in western province of Saudi Arabia, there was a complain of downgraded broiler carcasses at slaughter due to the presence of hemorrhages in the skeletal muscles of the birds. Accordingly, an investigation was conducted concerning the outbreak. Clinical and pathological finding consistent with chicken anemia virus [CAV] infection was revealed. The virus was demonstrated in the bone marrow of affected chicken. Further studies such as reproduction of the disease experimentally in chickens confirmed that the outbreak was due to CAV

Effect of low-level infection of Eimeria Tenella for a short duration on development of specific immunity in chicken

Two experiments were conducted to determine the effect of inoculation of low levels of Eimeria tenella sporulated oocysts for the first one or two weeks of life [trickle infection method] on the development of specific immunity in chickens. Chicken inoculated daily at 1 to 14 days of age with 40 sporulated oocysts of Eimeria tenella provided better immunity than in the case of chicken infected at 1 to 7 days only. This treatment was also preferable than those inoculated with 280 sporulated oocysts once at day 1 or day 7 or twice at days 1 and 7 of age. Better immunity was provided when chicken were infected starting at the age of 1 to 7 days than that observed at later age 7 to 13 days