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Zoonotic diseases of bacterial, viral, rickettsial, chlamydial, fungal and parasitic origins constitute an important global health problem. Out of a total of 1405 infectious diseases that infect human beings 58% (817) are zoonotic in nature and out of 177 infections that are emerging or reemerging 73 % (130) are zoonoses. Emerging and reemerging zoonoses are newly evolved or have occurred previously but have more recently shown an increase in incidence or expansion into a new geographic host or vector range. The emergence of zoonotic diseases is increasing in many countries in the world and represent a global threat to human and animal health. Zoonoses occur in sporadic as well as epidemic forms and affect both sexes and all age groups.
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