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Suspected ciliary dysfunction in Chinese Shar Pei pups with pneumonia
C R Dhein1, D J Prieur, M W Riggs
1Department of Veterinary Clinical Medicine and Surgery, Washington State University, Pullman 99164.
American Journal of Veterinary Research
|March 1, 1990
Summary
Chronic pneumonia in young Chinese Shar Pei dogs is linked to abnormal cilia function, impairing mucociliary clearance and increasing pneumonia risk. This suggests a primary defect in ciliary structure affecting respiratory health.
Area of Science:
- Veterinary Pathology
- Immunology
- Respiratory Physiology
Background:
- Investigated chronic pneumonia in a litter of young Chinese Shar Pei dogs.
- Observed that 4 out of 6 dogs were affected by the condition.
Observation:
- Serum immunoglobulin (IgA, IgG, IgM) levels varied but were not consistently lower in affected dogs.
- Two deceased dogs exhibited hydrocephalus, lymphoid depletion, and severe broncho-pneumonia.
- Ultrastructural evaluation revealed abnormal cilia orientation and microtubular disorganization in affected dogs' respiratory tracts.
Findings:
- Tracheal mucociliary clearance was absent in one examined dog.
- Ciliary abnormalities were strongly suspected to cause inefficient mucociliary transport.
- This inefficiency predisposes affected dogs to developing pneumonia.
Implications:
- Suggests a potential primary defect in ciliary structure or function contributing to recurrent respiratory infections in this breed.
- Highlights the importance of evaluating ciliary function in cases of unexplained chronic pneumonia in dogs.
- Provides insights into the pathogenesis of respiratory disease in Chinese Shar Pei dogs.