Which disease in pigs is associated with rectal stricture?

Which disease in pigs is associated with rectal stricture?

• A. Salmonella typhimurium
• B. Toxoplasma gondii
• C. Mycoplasma hyopneumoniae
• D. Erysipelothrix rhusiopathiae

Answer: (A)

Rectal stricture in pigs comes from chronic inflammation of the rectal mucosa that leads to scarring and narrowing of the lumen. In swine, infection with Salmonella Typhimurium can involve the distal gut and rectum, causing proctitis with mucosal irritation, ulceration, and subsequent fibrotic healing. That scar tissue can contract and form a stricture, which is why this disease is the one most typically linked to rectal narrowing. The other organisms cause different disease patterns—toxoplasmosis mainly affects reproduction, Mycoplasma hyopneumoniae causes enzootic pneumonia, and Erysipelothrix rhusiopathiae causes erysipelas with skin, joint, or heart involvement—not rectal strictures.

Rectal stricture in pigs comes from chronic inflammation of the rectal mucosa that leads to scarring and narrowing of the lumen. In swine, infection with Salmonella Typhimurium can involve the distal gut and rectum, causing proctitis with mucosal irritation, ulceration, and subsequent fibrotic healing. That scar tissue can contract and form a stricture, which is why this disease is the one most typically linked to rectal narrowing. The other organisms cause different disease patterns—toxoplasmosis mainly affects reproduction, Mycoplasma hyopneumoniae causes enzootic pneumonia, and Erysipelothrix rhusiopathiae causes erysipelas with skin, joint, or heart involvement—not rectal strictures.