Coccidiosis Vaccination Coccidia are common
protozoan parasites. They are present in almost all chicken
yards and can lay dormant for years until chickens are
introduced. Heavy infections of coccidia cause serious
disease and may kill many chickens.
Marek’s Vaccination Marek's is a
widespread disease affecting domestic chickens in all
sections of the world. It is characterized by lesions
affecting the nervous system, organs, and other tissues.
Young chickens under 16 weeks of age are most susceptible.
There is no treatment for Marek's once the birds are