• A. ARJUNA APPA RAO
• P. KRISHNA
• B.RAM PRASAD
• B.V SANDEEP

Theileria is a genus of parasitic protozoan that belongs to the phylum Apicomplexa and is closely related to Plasmodium. Two species, T.annulata and T.parva are important cattle parasites. T.annulata causes tropical theileriosis and T.parva causes East coast fever. It is transmitted by the zoonotic ticks like Hyalommadetritum and Hyalommaanatolicum.Tick-borne diseases (TBDs) hamper the growth of the livestock sector and impose serious constraints on the health and productivity of domesticated cattle in tropical and sub-tropical regions of the world (de Castro,1997). The TropicalTheileriosis, bovine babesiosis and anaplasmosis are among the economically most important diseases of cattle. The Theileriasiswas caused by an apicomplexan intra cellular parasite T.aannulata in cattle. This disease is characterized by leuko-proliferative and leuko - destructive phases with marked anemia (Tait and Hall, 1990). In India, the parasite mainly causes clinical disease in exotic and cross-bred cattle and young indigenous calves(Beniwal etal.,1997). So, It is very essential to have complete knowledge of this parasite prevalent in the area for developing an effective control programmes and mass vaccination strategy.

Theileriaannulata , Theileriosis, apicomplexan, Hyalommadetritum

"THE PREVALENCEOF TROPICALTHEILERIASISIN CATTLE OF VISAKHAPATNAM DISTRICT, ANDHRA PRADESH - INDIA.", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 6, page no.23-40, June-2019, Available :http://www.jetir.org/papers/JETIR1906735.pdf

"THE PREVALENCEOF TROPICALTHEILERIASISIN CATTLE OF VISAKHAPATNAM DISTRICT, ANDHRA PRADESH - INDIA.", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 6, page no. pp23-40, June-2019, Available at : http://www.jetir.org/papers/JETIR1906735.pdf