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Fatal rectal perforation following boar-to-boar mounting
R Ulrich1, U Philipp, B C Buck
1Department of Pathology, University of Veterinary Medicine Hannover, Bünteweg 17, D-30559 Hannover, Germany. reiner.ulrich@tiho-hannover.de
Veterinary Pathology
|March 7, 2012
Summary
Abnormal sexual behavior in pigs can lead to fatal rectal perforations. Semen from pen mates was found in a deceased pig, highlighting risks associated with intact boars.
Area of Science:
- Veterinary Pathology
- Animal Behavior
- Reproductive Biology
Background:
- Abnormal sexual behaviors, such as boar-to-boar mounting with anal penetration, are known in pubescent pigs.
- Pathologic consequences of these behaviors are rarely documented.
Observation:
- A 7-month-old male minipig exhibited lethargy and reluctance to rise before death.
- Necropsy revealed two rectal tears causing fibrinous peritonitis.
- Spermatozoa were identified in the pelvic and peritoneal cavities.
Findings:
- DNA typing confirmed the intraperitoneal semen originated from at least two pen mates.
- The rectal tears were identified as the cause of death.
Implications:
- Prohibiting castration in fattening pigs, as seen in some European countries, may increase the risk of rectal perforation in co-housed animals.
- This case highlights a potential welfare and mortality concern in swine husbandry practices.
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