Final answer:
Urea-splitting bacteria like Proteus, Klebsiella, and Pseudomonas cause the formation of struvite kidney stones by increasing urine pH.
Step-by-step explanation:
The urea-splitting bacteria such as Proteus, Klebsiella, and Pseudomonas contribute to the formation of struvite kidney stones. These bacteria are capable of splitting urea into ammonia, which then decreases the acidity of the urine. This altered urinary pH creates a suitable environment for the formation of struvite stones, which consist of magnesium, ammonium, and phosphate. Struvite stones are commonly associated with urinary tract infections (UTIs).