Feitoza Luis F B B, White Brad J, Larson Robert L, Jensen Makenna, Carpenter Laura, Plattner Brandon L, Finley Abigail, Spore Tyler J
Department of Clinical Sciences, Beef Cattle Institute, College of Veterinary Medicine, Kansas State University, Manhattan, KS.
Department of Diagnostic Medicine/Pathobiology, Kansas State Diagnostic Laboratory, College of Veterinary Medicine, Kansas State University, Manhattan, KS.
Am J Vet Res. 2024 Dec 17;86(2). doi: 10.2460/ajvr.24.08.0233. Print 2025 Feb 1.
To use a novel approach of targeted thoracic point-of-care ultrasound (TT-POCUS) of the caudodorsal right lung to determine potential associations between TT-POCUS measurements and the presence of interstitial pneumonia (IP) in feedyard cattle.
Cross-sectional study evaluated feedyard animals (n = 62; 358.4 ± 10.5 kg; heifer, n = 38; steer, n = 24) using TT-POCUS at time of respiratory disease treatment and microscopic assessment of lesions at subsequent mortality. Evaluations took place from July through December 2023. Pulmonary samples were collected at necropsy for histopathologic assessment, and lesions were used to diagnose IP or non-IP. Statistical models determined potential associations between IP, cattle demographic, and TT-POCUS measured variables.
Evaluations of animals enrolled (n = 62) displayed significant associations with IP, including ultrasound lung score (ULS), B-line count, A-line count, and days on feed at treatment. Cattle with a ULS of 5 had the lowest probability of IP (0.12 ± 0.16) compared to cattle with a ULS of 2, 3, or 4 (0.72 ± 0.18, 0.93 ± 0.06, and 0.85 ± 0.08, respectively). Cattle with B-line counts > 5 had a higher probability of IP (0.86 ± 0.11) compared to cattle with 3 to 5 B-lines (0.38 ± 0.14). The probability of IP was higher in cattle with A-line counts < 3 (0.83 ± 0.10) compared to cattle with ≥ 3 A-lines (0.51 ± 0.15).
Strategic targeted thoracic ultrasonography has potential a value of timely IP diagnosis in feedyard cattle, thereby offering important insights into therapeutic and management decisions.
Targeted thoracic ultrasonography can be utilized as a method for IP diagnosis in feedyard cattle.
采用一种针对右肺尾背侧的新型靶向胸部即时超声检查（TT-POCUS）方法，以确定TT-POCUS测量值与饲养场牛群间质性肺炎（IP）存在情况之间的潜在关联。
横断面研究在呼吸道疾病治疗时对饲养场动物（n = 62；体重358.4 ± 10.5千克；小母牛，n = 38；公牛，n = 24）使用TT-POCUS，并在后续死亡时对病变进行显微镜评估。评估于2023年7月至12月进行。在尸检时采集肺样本进行组织病理学评估，并用病变来诊断IP或非IP。统计模型确定了IP、牛群特征和TT-POCUS测量变量之间的潜在关联。
对纳入的动物（n = 62）进行评估显示，其与IP存在显著关联，包括超声肺评分（ULS）、B线计数、A线计数以及治疗时的饲养天数。与ULS为2、3或4的牛（分别为0.72 ± 0.18、0.93 ± 0.06和0.85 ± 0.08）相比，ULS为5的牛患IP的概率最低（0.12 ± 0.16）。与有3至5条B线的牛（0.38 ± 0.14）相比，B线计数> 5的牛患IP的概率更高（0.86 ± 0.11）。与A线计数≥ 3的牛（0.51 ± 0.15）相比，A线计数< 3的牛患IP的概率更高（0.83 ± 0.10）。
策略性靶向胸部超声检查在饲养场牛群中对IP进行及时诊断具有潜在价值，从而为治疗和管理决策提供重要见解。
靶向胸部超声检查可作为饲养场牛群IP诊断的一种方法。
