Eidgenössisches Examen Veterinärmedizin Practice Questions - Eidgenössisches Examen In Veterinärmedizin Examen Fédéral De Médecine Vétérinaire Exam

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A 5-year-old Swiss Fleckvieh dairy cow 3 weeks postpartum presents with a sudden drop in milk yield, ketonuria, selective anorexia (refusing concentrates but eating hay), and a hollowed left paralumbar fossa. Auscultation with simultaneous percussion over the left 9th to 12th rib intercostal spaces reveals a high-pitched, metallic resonant 'ping' sound. What is the definitive diagnosis and primary pathophysiology?

Primary ruminal lactic acidosis with massive left-sided gas cap accumulation Left-Displaced Abomasum (LDA / Linksseitige Labmagenverlagerung) caused by abomasal atony, gas accumulation, and displacement dorsally and to the left between the rumen and the left abdominal wall Cecal dilatation and torsion displaced into the left hypochondriac region Traumatic reticuloperitonitis with localized gas-forming abscess formation in the omental bursa

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Left-Displaced Abomasum (LDA / Linksseitige Labmagenverlagerung) caused by abomasal atony, gas accumulation, and displacement dorsally and to the left between the rumen and the left abdominal wall

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