Struvite crystals from cat under the microscope

This cat presented with a urinary obstruction. The cat was treated at the Cuyahoga Falls Veterinary Clinic who have given me express permission to use their photos on condition I link to their site. We hear a lot about bladder stones in cats and feline lower urinary tract disease. It is the most common disorder affecting the ‘lower urinary tract’ in cats.

The anatomy comprises the urinary bladder, bladder sphincters and urethra. Bladder stones are called ‘uroliths’. The most common types are struvite (magnesium phosphate) and calcium oxalate. Two important factors in the creation of struvite crystals are (a) urine with a high pH (alkaline) of over 6.8 and (b) high concentrations of magnesium in the urine. Female cats in the age range 1-2 years have more chance of developing struvite uroliths. More than 85% of urethral plugs are caused by struvite crystals.

This is what they look like:

Struvite crystals in a cat
Struvite crystals in a cat. Photo: Cuyahoga Falls Veterinary Clinic on Flickr.

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1 thought on “Struvite crystals from cat under the microscope”

  1. The author of the best comment will receive an Amazon gift of their choice at Christmas! Please comment as they can add to the article and pass on your valuable experience.
  2. My opinion is that if cats are given D-Mannose powder mixed in their wet food, it can prevent urinary infections and blockage, which in males can be deadly if not caught in time.

    Being “caught in time” usually means several days of hospitalization and several thousand dollars.

    Most vets know nothing about this. I shared the information with one of my vets, and she had never heard of it.

    D-Mannose is also a preventive for humans with chronic UTI.

    Prevention is the intelligent way to care for our cats and ourselves!

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