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Published on: March 29, 2020
Chlamydia in canine or feline coronary arteriosclerotic lesions
Ivan C Sostaric-Zuckermann1, Nicole Borel, Carmen Kaiser
1Institute for Veterinary Pathology, University of Zurich, Vetsuisse Faculty, Winterthurerstrasse 268, CH-8057 Zurich, Switzerland. n.borel@access.uzh.ch.
Insights
This study found no clear link between Chlamydia infection and coronary arteriosclerosis in dogs or cats. Further research with more samples is needed to confirm these findings on Chlamydia and atherosclerosis.
Area of Science:
- Veterinary Pathology
- Infectious Diseases
- Cardiovascular Science
Background:
- Chlamydia infection is linked to human coronary atherosclerosis.
- Data on Chlamydia and atherosclerosis in dogs and cats is limited.
- This study investigates the correlation in canine and feline species.
Purpose of the Study:
- To examine the correlation between Chlamydia and spontaneous atherosclerosis/arteriosclerosis in dogs and cats.
- To investigate the presence of Chlamydiaceae in canine and feline heart tissues with arteriosclerotic lesions.
Main Methods:
- Histopathological examination of archived canine (n=16) and feline (n=13) heart tissues.
- Detection of Chlamydiaceae using real-time PCR, ArrayTube Microarray, and immunohistochemistry.
- Histological classification and grading of arteriosclerotic lesions.
Main Results:
- All canine cases (atherosclerotic and arteriosclerotic) were negative for Chlamydia.
- One feline arteriosclerotic case tested positive for Chlamydia abortus.
- Canine and feline arteriosclerotic lesions were similar, predominantly moderate and hyperplastic.
Conclusions:
- No obvious correlation found between canine/feline coronary arteriosclerosis and Chlamydia.
- Further studies with larger sample sizes are required to definitively conclude the Chlamydia-atherosclerosis link in dogs.
Background:
There are numerous reports linking Chlamydia infection to human coronary atherosclerosis. However, there is a lack of data regarding this correlation in dogs and cats, and there are no reports investigating coronary arteriosclerosis and Chlamydia in these species. The aim of the present study was to examine whether there is a correlation between canine and feline spontaneous atherosclerosis or arteriosclerosis and the presence of Chlamydia. Archived histopathological samples of dogs (n = 16) and cats (n = 13) with findings of atherosclerosis or arteriosclerosis in heart tissue were examined for the presence of Chlamydiaceae using real-time PCR, ArrayTube Microarray and immunohistochemistry. Additionally, arteriosclerotic lesions of all cases were histologically classified and graded.
Results:
Both canine atherosclerotic cases, and all 14 canine arteriosclerotic cases were negative for Chlamydia. Only one of the 13 arteriosclerotic feline cases was positive for Chlamydia by real-time PCR, revealing C. abortus by ArrayTube Microarray. To our knowledge, this is the first description of C. abortus in a cat. Overall, the type and grade of canine and feline arteriosclerotic lesions revealed similarities, and were predominantly moderate and hyperplastic.
Conclusions:
These findings suggest that there is no obvious correlation between canine and feline coronary arteriosclerosis and the presence of Chlamydia. In order to draw final conclusions about the correlation between Chlamydia and canine atherosclerosis, examination of more samples is required.
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