Which statement about canine uroliths is true?

Which statement about canine uroliths is true?

• A. Struvite is the least common urolith
• B. Calcium Oxalate is the most common
• C. Uric Acid is the most common
• D. Struvite is the most common

Answer: (D)

In dogs, the most common urolith type is struvite, which forms when urine becomes alkaline often due to infection with urease-producing bacteria. These bacteria split urea into ammonia, raising pH and promoting crystallization of magnesium ammonium phosphate. This link between urinary tract infections and alkaline urine helps explain why struvite stones are the leading type seen clinically. They are more frequently encountered in female dogs and are often amenable to medical management: treating the infection and using urine-acidifying strategies can dissolve the stones in many cases, avoiding surgery. Calcium oxalate stones, while still common, occur less frequently than struvite and typically aren’t dissolvable by dietary changes alone, and urate stones are relatively rare in dogs except in certain breeds or metabolic conditions. So, the statement that struvite is the most common urolith in dogs aligns with how infections and urine chemistry drive stone formation.

In dogs, the most common urolith type is struvite, which forms when urine becomes alkaline often due to infection with urease-producing bacteria. These bacteria split urea into ammonia, raising pH and promoting crystallization of magnesium ammonium phosphate. This link between urinary tract infections and alkaline urine helps explain why struvite stones are the leading type seen clinically. They are more frequently encountered in female dogs and are often amenable to medical management: treating the infection and using urine-acidifying strategies can dissolve the stones in many cases, avoiding surgery. Calcium oxalate stones, while still common, occur less frequently than struvite and typically aren’t dissolvable by dietary changes alone, and urate stones are relatively rare in dogs except in certain breeds or metabolic conditions. So, the statement that struvite is the most common urolith in dogs aligns with how infections and urine chemistry drive stone formation.