URINE AND PARASITE TESTING
Urinalysis
An examination of urine concentration, chemistry and microscopic sediment that complements bloodwork and helps investigate urinary and systemic disease.
THE SHORT VERSION
Testing helps answer a clinical question.
A urinalysis evaluates the physical, chemical and microscopic characteristics of urine. It can provide important information about hydration, kidney concentration, inflammation, glucose, protein, blood and crystals.
What is this test?
A urinalysis evaluates the physical, chemical and microscopic characteristics of urine. It can provide important information about hydration, kidney concentration, inflammation, glucose, protein, blood and crystals.
Urine gives information that bloodwork alone cannot provide. Its concentration helps assess water handling, while chemistry and sediment examination can identify other clues. The collection method matters: material picked up from a surface can have different contamination concerns from a sample collected directly from the bladder. Tell the clinic when and how a home sample was obtained and stored. A culture may be recommended if infection is suspected. Crystals, blood, or an unusual color are findings to interpret in context, not stand-alone instructions for a diet change or antibiotic.
What information can it provide?
- Urine concentration helps determine whether the kidneys are appropriately concentrating or diluting urine.
- Protein, glucose and blood can identify patterns that deserve further veterinary investigation.
- Urine acidity, reported as pH, contributes context but does not diagnose a condition by itself.
- Microscopic sediment can reveal cells, crystals, casts, organisms or contamination.
- The collection method—free catch, catheterization or sterile bladder collection—affects interpretation.
Urinalysis combines several observations, including urine concentration, chemical findings, and microscopic examination of the sediment. Cells, crystals, and bacteria have to be interpreted with the collection method and how the sample was stored. A culture may be needed to establish whether bacteria are causing an infection. Crystals alone do not prove that a stone is present, and a single abnormal finding may need confirmation. Ask which result is changing the care plan and whether a repeat sample is needed.
Producing larger volumes of urine is different from trying repeatedly to pass a few drops. The first pattern can reflect changes in water balance or metabolism; the second can reflect pain or obstruction in the lower urinary tract. Owners can help by describing the amount passed on each attempt and any straining, blood, or discomfort. An animal can make repeated attempts without emptying the bladder safely. Suspected inability to urinate requires urgent assessment rather than waiting for a sample.
When might your veterinarian recommend it?
- Investigate increased thirst, increased urination, accidents, straining or urinary discomfort.
- Interpret kidney-related bloodwork, diabetes concerns or suspected infection.
- Monitor chronic kidney disease, urinary stones, protein loss or treatment response.
What can owners do before the visit?
- Ask whether the clinic wants a fresh home-collected sample or a sample collected at the appointment.
- Deliver samples promptly and follow clinic guidance about temporary refrigeration.
- Tell the veterinary team about medication, prior antibiotics and collection timing.
A useful specimen depends on the test, collection method, freshness, storage, and contamination. Ask the clinic what is needed before collecting urine, stool, water, tissue, or other material. Mark the collection time and relevant history, and follow transport instructions. A convenient home sample may answer one question while a differently collected sample is needed for another. Do not postpone care for an unstable animal while trying to obtain a perfect specimen; the team can arrange an appropriate collection when safe.
What can this test not tell you by itself?
- A home-collected sample can be contaminated and may not be appropriate for culture.
- Stress, diet, storage time and collection method can change the findings.
- Crystals, bacteria or protein need clinical interpretation rather than automatic conclusions.
The kidneys do more than remove waste. They help regulate water, salts, and other aspects of the body's internal balance. When kidney function changes, thirst, urine output, appetite, and overall strength may change as well. A blood result and a urine result answer different questions: waste concentrations provide one view, while urine concentration and other urine findings provide another. A diagnosis therefore depends on the pattern of results and the animal's condition, rather than one number in isolation.
Antibiotic selection depends on the suspected or confirmed bacteria, the site of infection, and the animal's safety needs. A culture identifies organisms that grow from a sample; susceptibility testing helps assess which medicines may work against them. The laboratory result is considered alongside tissue penetration, dosing feasibility, and the clinical response. Antibiotics do not treat viruses, and adding one without a clear reason can obscure the investigation or cause adverse effects. Follow the current prescription rather than using leftovers from a previous illness.
Do not change medication, interpret an abnormal number as a diagnosis or delay urgent treatment without direction from your veterinary team.
Useful questions for your appointment
- How was the urine collected, and does the collection method change the meaning?
- Should the sample be cultured or compared with bloodwork and blood pressure?
- What signs should make me call immediately?