Evidence-Based Supplement & Herb Guides

Urine Culture Contamination: Mixed Flora, Epithelial Cells, and Repeat Testing Meaning

Learn what urine culture contamination means, how mixed flora and squamous epithelial cells affect interpretation, when repeat testing is useful, and how to collect a cleaner specimen.

Urine culture contamination means organisms entered the specimen during collection, handling, or transport and may not represent bacteria causing an infection inside the urinary...

Urine Culture Test: Positive, Negative, Bacteria, Colony Count, and Meaning

Understand urine culture results, including positive and negative findings, bacteria, CFU colony counts, mixed flora, contamination, and antibiotic susceptibility.

A urine culture checks whether bacteria or yeast grow from a urine sample and, when growth is significant, identifies the organism causing it. It...

Urine Fungal Culture Test: Yeast, Candida, Fungal UTI, and Meaning

Learn what a urine fungal culture means, why Candida or yeast may appear in urine, how candiduria differs from fungal UTI, and when treatment or more testing may be needed.

A urine fungal culture looks for yeast or other fungi in urine, most often Candida species. A positive result does not automatically mean a...

Urine Gram Stain Test: Bacteria Type, Infection, and Preliminary Culture Clues

Learn how a urine Gram stain shows gram-negative or gram-positive bacteria, what a negative result means, and how preliminary findings compare with urine culture.

A urine Gram stain is a rapid microscopy test that can show bacteria, their broad Gram category, and sometimes the amount of inflammatory cells...

Urine Leukocyte Esterase Test for UTI: Positive Result, White Blood Cells, and Meaning

Learn what a positive urine leukocyte esterase test means, how it relates to white blood cells and UTI, why false results happen, and when culture is needed.

Leukocyte esterase is a rapid urine dipstick marker that suggests white blood cells are present in urine. A positive result can support a urinary...

Urine Nitrite Test for UTI: Positive Result, Bacteria, and Infection Meaning

Understand urine nitrite test results for UTI, including what a positive or negative result means, which bacteria make nitrite, false negatives, and when culture is needed.

A urine nitrite test is a rapid dipstick test that can support the diagnosis of a bacterial urinary tract infection (UTI). A positive result...

Urine PCR Test for UTI: Bacterial DNA, Resistance Genes, and Result Meaning

Learn how urine PCR testing detects UTI bacterial DNA and resistance genes, how it compares with urine culture, and what positive, negative, or multi-organism results mean.

A urine PCR test for UTI uses molecular methods to detect bacterial DNA, and some panels also look for selected antibiotic resistance genes. Compared...

UTI Test Panel: Urinalysis, Urine Culture, Sensitivity, and Infection Markers

Understand a UTI test panel, including urinalysis, leukocyte esterase, nitrite, WBCs, urine culture, CFU colony count, and antibiotic susceptibility results.

A UTI test panel is not one universal laboratory package. It usually means a combination of tests used to decide whether a urinary tract...

White Blood Cells in Urine Test: Pyuria, UTI, Inflammation, and Meaning

Understand white blood cells in urine, pyuria ranges, UTI and sterile-pyuria causes, how WBCs relate to leukocyte esterase and nitrite, and when follow-up is needed.

White blood cells in urine are a sign of inflammation somewhere in the urinary tract, but they do not automatically mean a bacterial urinary...

Acanthocytes in Urine: Glomerular Kidney Disease and Hematuria Meaning

Acanthocytes in urine suggest glomerular bleeding. Learn what they mean, how they differ from other dysmorphic RBCs, and when hematuria needs kidney follow-up.

Acanthocytes in urine are abnormally shaped red blood cells that strongly suggest bleeding from the kidney’s glomeruli, the tiny filters that clean the blood....

Amorphous Crystals in Urine: Urates, Phosphates, pH, and Meaning

Amorphous crystals in urine are usually urates in acidic urine or phosphates in alkaline urine. Learn what they mean, how pH affects them, and when follow-up is needed.

Amorphous crystals in urine are tiny mineral precipitates that look like fine, shapeless granules under the microscope. The two common types are amorphous urates,...

Bacteria in Urine Microscopy: UTI, Contamination, Colony Count, and Culture Follow-Up

Bacteria in urine microscopy may mean UTI, contamination, or asymptomatic bacteriuria. Learn how pyuria, colony count, culture, and symptoms guide follow-up.

Bacteria seen on urine microscopy can support a urinary tract infection, but the finding does not prove that an infection is present. Bacteria may...

Bilirubin Crystals in Urine: Liver Disease Marker and Abnormal Urine Sediment

Bilirubin crystals in urine can signal conjugated bilirubin excretion from liver or bile-duct disease. Learn how they look, what tests confirm the cause, and when follow-up is urgent.

Bilirubin crystals in urine are an uncommon abnormal sediment finding that usually appears when conjugated bilirubin is being excreted in substantial amounts. Under the...

Broad Casts in Urine: Advanced Kidney Disease and Low Urine Flow

Broad casts in urine can reflect dilated tubules, low urine flow, and advanced kidney damage. Learn how broad waxy casts differ from other casts and what follow-up tests mean.

Broad casts in urine are unusually wide cylindrical structures formed inside enlarged or damaged kidney tubules and collecting ducts. They are an abnormal microscopy...

Calcium Oxalate Crystals in Urine: Kidney Stones, Causes, and Meaning

Calcium oxalate crystals are common and may occur without stones. Learn their shapes, causes, stone-risk meaning, 24-hour urine follow-up, and warning signs.

Calcium oxalate crystals are common urine crystals and are the mineral found in most kidney stones, but seeing them on microscopy does not mean...

Calcium Phosphate Crystals in Urine: Kidney Stones, Alkaline Urine, and Meaning

Calcium phosphate crystals in urine often reflect alkaline urine and may signal kidney stone risk. Learn the causes, pH link, testing, and prevention steps.

Calcium phosphate crystals in urine usually mean that the urine environment favors precipitation of calcium and phosphate, especially when urine pH is high. A...