In pyometra affecting a dog or cat, what is standard management and the key indication for performing surgery?

• A. Medical management with antibiotics only; no surgery
• B. Ovariohysterectomy is definitive; medical management is limited; signs of systemic illness or risk of rupture indicate surgery
• C. Spaying after 6 months; no immediate surgery
• D. Hysterectomy without removing ovaries

Answer: (B)

Pyometra is a life-threatening uterine infection in intact dogs and cats, driven by hormone-induced changes that make the uterus a reservoir for pus. The best treatment is removal of the uterus and ovaries (ovariohysterectomy), which cures the disease, eliminates the source of infection, and prevents recurrence. Medical management with antibiotics and supportive care can be attempted in some stable cases, especially for open pyometra, but it is not curative and carries a risk of deterioration. The surgical route becomes necessary when the patient shows signs of systemic illness or when there is a risk the uterus could rupture, such as worsening infection, dehydration, fever, or septic status. In short, the standard approach is definitive surgical removal; medical therapy is limited and reserved for select stable situations, and urgent surgery is indicated by systemic illness or rupture risk.