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Abstract:
Cytomegalic cells with intranuclear inclusions were identified in lung tissue from one of two weanling Western lambs with pneumonia and Mycoplasma ovipneumoniae infection. On the basis of light and electron microscopy, cytomegalovirus infection was diagnosed. Arrays of viral particles whose morphology was consistent with that of viruses of the herpes group were in the intranuclear inclusions of cytomegalic cells.
Insights
Cytomegalovirus infection was diagnosed in a lamb with pneumonia and Mycoplasma ovipneumoniae. Viral particles consistent with herpesviruses were found in the lung tissue of the affected lamb.
Area of Science:
- Veterinary Pathology
- Virology
- Sheep Medicine
Background:
- Pneumonia is a significant respiratory disease in weaned lambs.
- Mycoplasma ovipneumoniae is a common bacterial cause of pneumonia in sheep.
- Cytomegalic cells with intranuclear inclusions can indicate viral infections.
Observation:
- Cytomegalic cells featuring intranuclear inclusions were observed in the lung tissue of a lamb.
- The lamb also presented with pneumonia and Mycoplasma ovipneumoniae infection.
- Microscopic examination revealed viral particles within the inclusions.
Findings:
- Light and electron microscopy confirmed a cytomegalovirus infection.
- The morphology of the viral particles was consistent with herpesviruses.
- This suggests a co-infection or a secondary viral complication in the lamb.
Implications:
- This finding highlights the potential for cytomegalovirus to cause disease in sheep.
- It underscores the importance of considering viral etiologies in ovine pneumonia.
- Further research may elucidate the role of cytomegalovirus in Mycoplasma ovipneumoniae-associated respiratory disease in lambs.