Coccidiosis is a disease caused by Eimeria parasites commonly observed in mammals and birds' intestinal tract.
In chickens and turkeys, infection by this parasite is costly to both the producer (higher feed conversion ratios, depressed growth, and increased flock mortality) and the industry, causing billions of dollars in losses worldwide. While environmental management and anticoccidials (ionophores and chemicals added to the feed) have been the most common forms of prevention in the past, vaccination is quickly becoming a popular and successful option.
Newcastle disease is caused by a virus belonging to the family of Paramyxoviridae; it is an avian paramyxovirus of serotype 1 (APMV-1). It affects wild birds and domestic poultry and usually presents as a respiratory disease. Depression, nervous manifestations, or diarrhea may also be the predominant clinical symptoms and mortality.
Gumboro disease, also known as infectious bursal disease (IBD), is a highly contagious disease of young chickens. Today, the very virulent form is predominant in most countries, and variant strains of IBD are present in several countries, leading to sub-clinical forms of the disease.