Related Experiment Videos
Experimental epididymitis and urethritis in grivet monkeys provoked by Chlamydia trachomatis
Abstract:
Recently Chlamydia trachomatis has been indicated as a common cause of acute epididymitis in young men. In the present study, the grivet monkey was established as an experimental model for such infection. A yolk sac suspension of C. trachomatis, immunotype K, was inoculated into the left spermatic cords of two monkeys. On days 7 and 14 postinoculation (pi), the left testis of each monkey was enlarged to twice its normal size. The epididymis and the spermatic cord on the same side were swollen and reddened. All layers of spermatic cord were infiltrated with lymphocytes and polymorphonuclear leukocytes, and the lumen, which was filled with an exudate, was reduced in diameter. The luminar epithelium was destroyed. The ducts of the left epididymis were filled with an inflammatory exudate. The epithelium was flattened, but there were no lesions. The seminiferous tubules of the left testis were normal, but edema and hyperemia were observed in the interstitial tissue. The right spermatic cord was inoculated with noninfected yolk sac suspension. On the right side, no inflammatory reactions were seen in the testis, the epididymis, or the spermatic cord. The monkeys had a yellowish discharge 7 to 14 days pi. Urethral smears revealed an preincubation values were found.
Insights
Grivet monkeys infected with Chlamydia trachomatis developed acute epididymitis, mirroring human infections. This study validates the grivet monkey as a reliable model for studying C. trachomatis epididymitis.
Area of Science:
- Reproductive Medicine
- Infectious Diseases
- Primate Models
Background:
- Chlamydia trachomatis is a frequent cause of acute epididymitis in young men.
- An effective experimental model is needed to study this condition.
Purpose of the Study:
- To establish and validate the grivet monkey as an experimental model for Chlamydia trachomatis-induced epididymitis.
Main Methods:
- Two grivet monkeys were inoculated with Chlamydia trachomatis (immunotype K) in the spermatic cord.
- Infection progression and pathological changes were monitored post-inoculation.
- Control inoculation with non-infected material was performed on the contralateral side.
Main Results:
- Infected monkeys showed testicular enlargement, swelling, and redness of the epididymis and spermatic cord.
- Histological analysis revealed inflammatory cell infiltration, epithelial destruction, and exudate in the spermatic cord and epididymis.
- No inflammatory reactions were observed in the control (uninfected) side.
Conclusions:
- The grivet monkey serves as a suitable experimental model for Chlamydia trachomatis epididymitis.
- The model accurately replicates the pathological features observed in human infections.
- Further research into Chlamydia trachomatis epididymitis can utilize this primate model.