A urinary tract infection as a result of Proteus mirabilis facilitates the formation of kidney stones because the organism:
## Core Concept
The question tests the understanding of how certain bacteria, specifically *Proteus mirabilis*, contribute to the formation of kidney stones in the context of urinary tract infections (UTIs). *Proteus mirabilis* is known to produce urease, an enzyme that plays a significant role in the formation of certain types of kidney stones.
## Why the Correct Answer is Right
The correct answer, , is right because *Proteus mirabilis* produces **urease**, an enzyme that catalyzes the hydrolysis of urea into **ammonia** and **carbon dioxide**. This reaction increases the pH of the urine, leading to the precipitation of **struvite stones** (also known as magnesium ammonium phosphate stones). Struvite stones are one of the types of stones that can form in the urinary tract, particularly in the context of infections with urease-producing bacteria like *Proteus mirabilis*.
## Why Each Wrong Option is Incorrect
- **Option A:** This option is incorrect because it does not accurately describe the mechanism by which *Proteus mirabilis* facilitates kidney stone formation. Without specific details, it's hard to address directly, but the focus is on urease production.
- **Option B:** This option is incorrect for similar reasons; it lacks specificity regarding the urease production and its consequences.
- **Option D:** This option is incorrect because it also fails to mention the urease production and its role in stone formation.
## Clinical Pearl / High-Yield Fact
A key point to remember is that **urease-producing bacteria** like *Proteus mirabilis*, *Pseudomonas*, and *Klebsiella* can cause infections that lead to the formation of **struvite stones**. This association is critical in clinical practice because it highlights the importance of treating the underlying infection to prevent recurrent stone formation.
## Correct Answer Line
**Correct Answer: C.**