Changes

*Temporary reduction in the tick population decreasing the transmission rate (causing enzootic instability)

*Temporary reduction in the tick population decreasing the transmission rate (causing enzootic instability)

*Infected cattle are transported or stressed in other ways, e.g. parturition

*Infected cattle are transported or stressed in other ways, e.g. parturition

== Clinical Signs ==

== Clinical Signs ==

It can be of a very sudden onset and this disease can be fatal. Pregnant cows will normally abort if infected during pregnancy.

It can be of a very sudden onset and this disease can be fatal. Pregnant cows will normally abort if infected during pregnancy.

== Diagnosis ==

== Diagnosis ==

Blood samples should be taken if haemoglobinuria is not present and smears should be made from these.

Blood samples should be taken if haemoglobinuria is not present and smears should be made from these.

== Treatment and Control ==

== Treatment and Control ==