## Core Concept
Struvite stones, also known as magnesium ammonium phosphate stones or infection stones, are a type of kidney stone associated with urinary tract infections (UTIs). They are typically composed of magnesium ammonium phosphate and are often seen in patients with recurrent UTIs caused by urease-producing bacteria.

## Why the Correct Answer is Right
Struvite stones are indeed associated with infections, particularly those caused by bacteria that produce the enzyme urease. Urease splits urea into ammonia and carbon dioxide, increasing the pH of the urine and promoting the formation of struvite stones. This process is a key factor in the development of these stones.

## Why Each Wrong Option is Incorrect
- **Option A:** Typically, struvite stones are associated with alkaline urine pH due to the urease activity of bacteria, which increases the pH. So, stating they are associated with acidic urine would be incorrect.
- **Option B:** Struvite stones are indeed often seen in the context of urinary tract infections, particularly those caused by urease-producing bacteria like Proteus, Pseudomonas, and Klebsiella. This relationship is well established.
- **Option C:** The composition of struvite stones, primarily magnesium ammonium phosphate, is accurate and reflects their association with infections and urease activity.
- **Option D:** Given that struvite stones are associated with infections and often require treatment of the underlying infection to prevent recurrence, stating they are not associated with infection treatment would be misleading.

## Clinical Pearl / High-Yield Fact
A key clinical pearl is that struvite stones are often a sign of an underlying urinary tract infection with urease-producing bacteria. Treatment typically involves antibiotics and sometimes surgical intervention to remove the stone. Prevention of recurrence involves managing the infection and sometimes using antibiotic prophylaxis.

## Correct Answer: A. More common in acidic urine.