UC Davis BRD vs Calf Health Scorer Usage & Stats
The California (CA) BRD scoring system was developed by researchers at the University of California (UC) Davis’s School of Veterinary Medicine, Department of Animal Science and UC Agriculture and Natural Resources. This calf-side system relies on the binary classification of significant predictors of BRD in preweaned dairy calves based on a statistical model of over 2000 preweaned dairy calves. The system was also validated using data from over 500 preweaned dairy calves in California.
The app can be used as an aid to the herd veterinarian and producer in the prevention and control of pneumonia in pre-weaned dairy calves under the Veterinary Client Patient Relationship. Calves can be scored to determine their CA BRD score status and results stored in a searchable database on the user’s mobile device.
Users can also estimate the prevalence of BRD in a herd of calves by scoring a random sample of calves that the app identifies upon providing the herd size and the required inputs for a sample size formula or accepting the defaults for a best guess prevalence estimate (25%) and how tight of a 95% confidence interval is desired (10% bound).
Similarly, the Spanish version is accessible once the device language is switched.
Under settings, users can switch between Celsius and Fahrenheit temperature input and elect to email questions and results to the Veterinary Medicine Teaching and Research Center, UC Davis if that option is selected.
The CA BRD scoring system for preweaned dairy calves is based on the following research and referenced methods:
1 – Agreement between bovine respiratory disease scoring systems for pre-weaned dairy calves. Aly SS, Love WJ, Williams DR, Lehenbauer TW, Van Eenennaam A, Drake C, Kass PH, Farver TB. Anim Health Res Rev. 2014; 15:148-50.
http://www.ncbi.nlm.nih.gov/pubmed/25424381
2 – Development of a novel clinical scoring system for on-farm diagnosis of bovine respiratory disease in pre-weaned dairy calves. Love WJ, Lehenbauer TW, Kass PH, Van Eenennaam AL, Aly SS. PeerJ. 2014; 2;2:e238.
http://www.ncbi.nlm.nih.gov/pubmed/24482759
3– Sensitivity and specificity of on-farm scoring systems and nasal culture to detect bovine respiratory disease complex in preweaned dairy calves. Love WJ, Lehenbauer TW, Van Eenennaam AL, Drake CM, Kass PH, Farver TB, Aly SS. J Vet Diagn Invest. 2016; 28:119-28.
http://www.ncbi.nlm.nih.gov/pubmed/26796957
4 - Scheaffer, R. L., W. Mendenhall, and R. L. Ott. 1995. Elementary Survey Sampling. 5th ed. Duxbury Press, Belmont, MA.
For more information contact us at: brd@vmtrc.ucdavis.edu
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The Calf Health Scorer App was developed at the University of Wisconsin School of
Veterinary Medicine. The app uses a graphical interface to evaluate calf health based on scoring selected clinical parameters developed and employed by Dr. Sheila McGuirk. The clinical parameters are nasal discharge, ocular discharge, ear position or head carriage, appetite, attitude, coughing, rectal temperature, fecal consistency, naval characteristics and appearance of the joints. Assigned scores range from 0 to 3 as the clinical sign progresses from normal to very abnormal.
Results from lung ultrasonography, as described by Dr. Terri Ollivett, can also be recorded. Lung ultrasound scores are 0 – 5. Scores of 0 – 1 are considered normal. A score of 2 indicates the presence of a lobular, or patchy, pneumonia. A score of 3 - 5 is indicative of a more severe lobar pneumonia. Specifically, a score of 3 means that only one lobe is entirely consolidated, whereas a score of 4 means that two lobes are entirely consolidated, and a score of 5 means that three or more lobes are entirely consolidated. Ultrasound scores of 3 and greater suggest the presence of bacterial pneumonia.
To screen calves, the user enters the calf id and birthdate, then scrolls through successive screens with pictures or word descriptions for scores 0, 1, 2 or 3 for each clinical parameter. After a score is selected, the screen is refreshed with the next clinical sign until all parameters have been recorded. The user saves the calf record with a button touch and is then ready to score a new calf. The data can be emailed to any interested party or shared with the specialists at the UW School of Veterinary Medicine.
Data lists generated include all calves scored, calves that may warrant treatment and calves that should be rechecked or monitored.
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UC Davis BRD VS. 
Calf Health ScorerDecember 26, 2024