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Why did this type of urolith increased in occurrence from 2003 to 2007?
“The sustained increase in occurrence of struvite uroliths from 2003 to 2007 may be associated with decreased use of diets designed to dissolve sterile struvite uroliths as a consequence of the significant increase in occurrence of calcium oxalate uroliths in the 1980s and 1990s. However, it is likely that most of the 5,432 sterile struvite uroliths obtained from cats and submitted to the urolith center in 2007 could have been readily dissolved in two to four weeks by feeding a diet designed to promote formation of urine that is undersaturated with struvite.”
-Carl A. Osborne, DVM, PhD, DACVIM
From Epidemiology of feline uroliths and urethral plugs