author(s)
ST Bino Sundar, TJ Harikrishnan, Bhaskaran Ravi Latha, G Sarath Chandra and TMA Senthil Kumar

abstract
Coccidiosis is one of the major disease of chicken caused by protozoan parasites of the genus Eimeria and anticoccidial drugs play a major role in combating this disease both therapeutically and prophyactically. Extensive use of anticoccidials has led to the development of anticoccidial drug resistance. This review article focuses on the evolution of anticoccidial drug resistance, types of resistance, factors favouring development of resistance, mechanisms of development of resistance, indices for detection of resistance and solutions and alternate approaches to overcome the problem of anticoccidial drug resistance.