First cryptosporidiosis vaccine approved for use
The vaccine course will need to be given during the third trimester.
The Veterinary Medicines Directorate has approved the first vaccine in Great Britain that protects cattle against the parasite which causes cryptosporidiosis.
Developed by MSD Animal Health, the Bovilis Cryptium vaccine can be used on pregnant heifers and cows to raise antibodies in colostrum against Gp40 of Cryptosporidium parvum.
The C. parvum parasite is one of the commonest causes of infectious scour in the UK. The disease can occur at any age, but it is most frequently seen in calves aged seven to 14 days.
The new vaccine is able to provide protection for calves from the start of colostrum feeding, which is when they are most vulnerable.
The primary vaccination course will be two doses, administered four to five weeks apart during the third trimester of pregnancy. It will need to be completed at least three weeks before calving. Cattle that have previously had the primary vaccination will only need a single booster dose during future pregnancies.
Kat Baxter-Smith, veterinary adviser with MSD Animal Health, said: “The protection of calves depends on adequate ingestion of colostrum and transition milk from vaccinated cows.
“It is recommended that all calves are fed colostrum and transition milk during the first five days of life. At least three litres of colostrum should be fed within the first six hours after birth.”
Philippe Houffschmitt, associate vice-president of the global ruminant business at MSD Animal Health, added: “MSD Animal Health is proud to offer this innovative vaccine – a new, science-driven way to combat the devastating parasite C. parvum, which impacts Europe and the rest of the world.”
“This novel vaccine offers preventive neonatal protection, which can help preserve cattle wellbeing from the earliest days of life, as well as help contribute to global food production and safety.”
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The BSAVA has opened submissions for the BSAVA Clinical Research Abstracts 2026.
