Objective To describe the clinical signs, conservative treatment, and short‐ and long‐term outcomes of lateral radioulnar subluxation in cattle. Animals Three cattle with lateral radioulnar subluxation. Study design Case series. Methods One 3‐year‐old Red Holstein cow, one 2‐year‐old Red Holstein cow, and one 9‐month‐old Holstein heifer were presented with acute, grade greater than 3 of 5, mixed lameness in one forelimb. Clinical, radiographic, and ultrasonographic examination results revealed radioulnar subluxation with lateral displacement in all cases. Results The subluxations were manually reduced under general anesthesia by simultaneous maximum flexion of the elbow and carpal joints, medial rotation of the forearm, and application of strong pressure to the radial head and olecranon. The short‐term clinical outcome after stall rest was excellent in all three cases. Clinical and radiographic follow‐up examinations were performed at varying intervals, with a final on‐farm examination in all three cattle 12, 7, and 9 months after reduction. Osteoarthritic changes were visible in all three cases, mainly at the medial humeral trochlea, but lameness had completely resolved in all three animals. Conclusion Conservative management of lateral radioulnar subluxation had an excellent clinical outcome in all three cattle. Follow‐up radiographs revealed osseous proliferation mainly in the region of the medial trochlea of the humerus and subtle signs of osteoarthritic changes. Clinical significance Lateral radio‐ulnar subluxation is a rare but possibly underdiagnosed cause of lameness in cattle. It should be part of the differential diagnosis in cattle with elbow joint pain.

IntroductionDevelopment and validations of accurate mastitis diagnostics are crucial to make timely and evidence-based decisions on mastitis therapy in order to reduce its impact on productivity, animal welfare and practicing the prudent use of antimicrobials on dairy farms.MethodsThe objectives of this study were to assess the agreement between test results from reference laboratory and two point of care tests (Selma plus, Dipslide) and to estimate the test accuracies with Bayesian latent class models (BLCMs). In total of 509 single quarter milk samples from cows with mastitis were included in the study.ResultsAmong all analyzed mastitis pathogens, Streptococcus spp. was detected in up to one third of all analyzed samples and for Selma all Streptococcus samples were considered as Streptococcus uberis. The agreement (κ) when comparing two tests varied greatly depending on the bacteria, ranging from no agreement to good agreement (κ = negative to 0.86) depending on the prevalence of identified pathogens. Based on BLCMs to assess diagnostic test accuracies for the pathogen Streptococcus uberis, posterior sensitivities of 76, 71, and 64% for Selma plus, Dipslide and laboratory standard culture and specificities of 93%, 98% for Selma and Dipslide, respectively, were obtained.DiscussionThe two point of care rapid culture systems Dipslide and Selma plus plate can provide important preliminary pathogen identification for targeted mastitis therapy, especially when general information about growth and a rough classification of the bacteria into groups have an impact on treatment strategy. The two evaluated rapid culture systems, Dipslide and Selma plus plate, show good test accuracies for Streptococcus uberis at least at genus level. Therefore, using these tests may contribute to prudent use of antibiotics.