The extraintestinal stages of @entity12917 and E. maxima in the XXXX .

@entity7849 @entity1573 @entity12917 @entity281
Donor @entity1573 given feed medicated with one or two levels of @entity7849 or given non-medicated feed were infected with oocysts of @entity12917 or E. maxima per os. Twelve hours after inoculation with oocysts liver, mid-intestine or ceca homogenates were fed to previously uninfected recipient @entity1573 . The results showed that continuous medication with @entity7849 was effective in preventing the transfer of sporozoites from the intestine to the liver. Oocysts were detected in the feces of all recipients of tissue from non-medicated donors, showing that some sporozoites of E. maxima and @entity12917 are normally transferred to liver. Young broiler @entity1573 were immunized by oral inoculation of E. maxima oocysts. The immune status of similar @entity1573 inoculated with sporozoites of the same species directly into the liver or spleen were assessed. During the experimental period half of the chicks were provided with non-medicated food and the remainder were given feed supplemented with @entity7849 ; @entity7849 was effective in arresting the development of the sporozoites. Two weeks after @entity281 the birds were challenged with oocysts of E. maxima per os. Injection of sporozoites into the spleen did not protect against challenge. Birds inoculated with sporozoites into the liver were unable to develop a significant level of immunity. When the drug pressure was removed from these birds, parasitism of the intestine occurred and immunity developed.
