Feline Struvite

These smooth to moderately irregular stones are mild to moderately radiodense depending on size. In 40% of cats there is usually only one stone.

In almost all cats, struvite (magnesium ammonium phosphate hexahydrate) forms without a urinary tract infection (i.e. sterile struvite uroliths). Culture urine prior to antibiotic administration if you suspect infection (urease-producing bacteria) as the cause of struvite formation.

• Repeat urine cultures with possible infection-induced struvite (e.g. cat with perineal urethrostomy).

• Antibiotics are rarely indicated, but should be provided for cats with infection-induced struvite (e.g. cat with perineal urethrostomy).

• Low phosphorus/magnesium foods that promote acidic urine (e.g. c/d multicare diets, others)

Repeat urinalyses every 6 months and medical imaging annually. Culture urine every 3-6 months for infection-induced struvite uroliths.

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Feline Struvite