Coccidia which is a common protozoan in domestic birds and other fowl is capable of developing resistance to antibiotics. Coccidiosis affects global food production causing economic losses that are globally estimated to be around 3 billion $ per year. This loss is caused by different coccidian species such as E. acervulina, E. maxima, and E. tenella., and depending on the species of the Eimeria involved, the infestation increases intestinal problems and causes immunosuppression in poultry flocks all around the world.
In cases of subclinical coccidiosis, production performance, water, and feed intake decreases, and animals will become more vulnerable to other diseases, especially to necrotic enteritis caused by Clostridium perfringens, or Salmonella infections. If not managed properly and necessary actions are not taken, subclinical coccidiosis may develop into clinical coccidiosis. A proper prevention programme against coccidiosis will also help to decrease the linked bacterial problems of the intestinal channel as well.