Senthilvel, KTANUVAS2020-10-052020-10-052020-02https://krishikosh.egranth.ac.in/handle/1/5810152409TNV_TM_17-26-Feb-2020_162-166The incidence of parasitic diseases, which was once very high in free range birds, as they have access to contaminated soil and arthropod intermediate hosts, has now been recorded frequently in commercial birds also. Although losses due to parasitic infections have not been quantified, they cause great economic loss to the industry by way of morbidity and mortality. However, parasitic infections rarely cause mortality in birds unless the infection is severe, but they cause decreased growth rate, production and feed efficiency. Besides, the affected birds are more susceptible to dreadful diseases owing to impaired immunity resulting from parasitic infections. Prevention and control of parasites is one of the cheapest and most dependable methods of increasing production.EnglishVeterinary SciencePoultry Disease Diagnosis and Surveillance LaboratoryArticle