Upper Alimentary Ulcerative Syndrome (UAUS) Research Project - Update
In October of last year, Agriculture Victoria commenced a research project evaluating the prevalence of and risk factors for UAUS, with information packs and consumables forwarded to DEDJTR District Veterinary Officers around the state for distribution to private dairy practitioners in their districts.
To-date, there have been investigations submitted to AgriBio from 10 properties with weaned calves meeting the case definition (Figure 1).
Figure 1. Location of properties submitted for the UAUS project (by shire), where colour intensity indicates the number of properties investigated.
Study herds have ranged in size from 130 - 650 cows, including Friesian, Jersey and cross-bred calves. Samples have been submitted from a total of 103 animals, including clinical and non-clinical animals, with post-mortem sampling performed on 10 calves. The sampled calves ranged in age from 2-8 months with an average age of 4.5 months.
Diagnostic testing has included culture for Salmonella species and Yersinia, evidence of parasites, bovine viral diarrhoea virus (BVDV), parapox virus and bovine herpes virus. Calves from five herds were also tested for copper, vitamin B12 and selenium levels.
To date, only one of the ten herds has been identified with lesions suggestive of UAUS.
The table below summarizes the laboratory results collated thus far.
Table 1. Summary of laboratory results for the UAUS Research Project
Number of herds with test positive calves.
Bovine herpes virus
Feacal egg counts
* Yersinia was also cultured from non-clinical animals in a number of herds.
As, based on historical cases, the peak timing for UAUS in Victorian dairy calves appears to be between October and March, further new cases may present this month. Final results for this season of the project will be presented in the next edition of VetWatch. The research project will continue for a further two seasons and updates will be provided throughout that time.
More information about the case definition and what is involved in the project is available here: