v.16, n.2, p.148-151, 2023

Diagnostic Exercise from The Latin Comparative Pathology Group

An outbreak of bluetongue in sheep

Pérez E, Asín J & Uzal FA

Clinical History:

During a 2-week period between mid-October and November 2022, approximately 20 out of 470 Rambouillet sheep from a flock in southern California died; the flock had been moved into irrigated hay fields recently. Some of the affected animals were initially underweight and most had nasal discharge, labored breathing and frothy discharge from the mouth. Two adult sheep (1 and 2) were submitted to the San Bernardino laboratory of the California Animal Health and Food Safety laboratory system (CAHFS) for necropsy and diagnostic work up.

Follow-up questions:

1. Morphological diagnoses for figures 1-6.
2. Most likely cause based on clinical history and necropsy findings.
3. Name at least one other associated gross lesion you should expect in the hoof and other in the heart.
4. Name at least 1 associated microscopic lesion.
5. Name 5 important differential diagnoses for figures 3-5.

DOI: 10.24070/bjvp.1983-0246.v16i2p148-151