Free PCR testing for babesiosis in our Redwater in cattle project
Free PCR testing for babesiosis in our Redwater in cattle project
Tick distribution across the UK is increasing, bringing with it the threat of tick borne diseases. In the south-west of England the most commonly reported tick borne disease in cattle is bovine babesiosis, otherwise known as redwater. The region has a relatively high prevalence for this disease, the reasons for this are unknown.
APHA scientists have recently developed a new pan-piroplasm PCR test to detect Babesia divergens (the causative organism of babesiosis) in blood samples. This test is highly sensitive, and is able to additionally detect other tick borne diseases (Anaplasma phagocytophilum, Rickettsia spp., Theileria spp.) which may be present. These ‘coinfections’ can result in higher than normal morbidity levels and given the different pathogenesis of each disease, can have a major impact on case management. Starcross has diagnosed a number of ‘coinfection’ outbreaks in cattle in the last few years. Typical clinical signs of redwater include fever, anaemia, diarrhoea, and red urine. Abortion can also occur. The symptoms of other tick borne diseases in cattle can be less specific and may be underdiagnosed.
During this grazing season - until autumn 2021, we are offering free PCR testing for babesiosis on EDTA blood samples. These can be submitted from up to three cattle displaying clinical signs of babesiosis per farm. This project will focus solely on farms in the south-west of England, and both beef and dairy animals at grass can be sampled. Results will be reported out in the usual manner.
To take part in the study, we ask that you submit the collected blood samples to APHA Starcross, alongside a completed APHA cattle submission form, which can be found on vet gateway http://apha.defra.gov.uk/vet-gateway/surveillance/forms.htm. We also ask that the full animal ear tag number and the OS map reference/what3words address of the affected grazing field is included.
The information gathered will contribute valuable surveillance data on babesiosis and other tick borne pathogens in our region. We may also contact participating farmers to collect further epidemiological data. This will help us understand risk factors for redwater in cattle, and why the south-west experiences a higher prevalence of disease.
If you have any further questions about this project, please email harriet.mcfadzean@apha.gov.uk
Issued: 26 May 2021