Effect of chronic Se administration in buffaloes was studied. Selenium
concentration in hair, blood and several other tissues was estimated.
Hair was a convenient material for analysis for diagnosis of chronic
selenosis. Even a fractional increase in hair Se would indicate initia
tion of chronic selenosis. Effort has been made to correlate hair and
blood Sc levels with the development of various symptoms. A high susce
ptibility of buffaloes to Se poisoning might be responsible for severe
symptoms of chronic selenosis in them which are quite similar to Deg
Nala disease.