With the changing global scenario there is effect not only on the human survival but also on the prevalence of existing pathogens and appearance of new infectious agents among animal population. This paper emphasises the need for prevalence studies. A retrospective study for 6 years on prevalence of hemoprotozoans in dogs in Chennai showed Babesia gibsoni the predominant parasite of dogs. Details are discussed in this paper.
Keywords: Dogs; Hemoprotozoans; Prevalence.