Published online by Cambridge University Press: 21 August 2009
INTRODUCTION
Babesiosis (also known as tick fever or cattle fever) is caused by intraerythrocytic protozoan parasites of the genus Babesia that infect a wide range of domestic and wild animals, and occasionally humans. The disease is tick-transmitted and distributed worldwide. Economically, tick fever is the most important arthropod-borne disease of cattle, with vast areas of Australia, Africa, South and Central America and the United States continuously under threat. Tick fever was the first disease for which transmission by an arthropod to a mammal was implicated at the turn of the twentieth century, and is the first disease to be eradicated from a continent (North America). This review describes the biology of Babesia spp. in the host and the tick, the scale of the problem to the cattle industry, the various components of control programmes, epidemiology, pathogenesis, immunity, vaccination and future research. The emphasis is on Babesia bovis and Babesia bigemina, the two most important species infecting cattle.
Babes (1888) investigated disease outbreaks causing haemoglobinuria in cattle in Romania in 1888 and was the first to describe piroplasms in the blood of cattle. He believed it to be a bacterium and named it Haematococcus bovis (Angus, 1996). Shortly afterwards investigations by Smith and Kilborne (1893) in the United States of America demonstrated the causative organism of ‘Texas Fever’ (babesiosis), which they called Pyrosoma bigeminum (= Babesia bigemina).
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