| Tick fever is a general name for a disease caused by both or either haemoparasites Babesia and Anaplasma. Cattle tick Boophilus microplus is the vector of the disease although anaplasmosis can also be transmitted by blood sucking insects. In most regions of Brazil, B. microplus can occur throughout the year because of suitable climate conditions. In the brazilian savannah region there are two or three cattle tick generations per year with a infestation peak in october. The increasing use of cultivated pastures and crosses with tick-susceptible european breeds has decreased resistance of zebu cattle in this region and control measures are suggested. Total control of B. microplus, howecer, can decrease cattle imunity and favours the occurence of tick fever.... |
