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Learn how antibiotic-resistant UTI testing identifies ESBL, CRE, resistance genes, and antibiotic susceptibility, and how culture results guide treatment and follow-up.

Antibiotic-Resistant UTI Test: ESBL, CRE, Resistance Markers, and Culture Meaning

Learn what asymptomatic bacteriuria means, how a positive urine culture without UTI symptoms is interpreted, and when screening, treatment, or follow-up matters.

Asymptomatic Bacteriuria Test: Positive Culture Without Symptoms and When It Matters

Learn how bacteria in urine are interpreted using urinalysis, culture, colony count, symptoms, and sample quality, including when contamination or follow-up testing matters.

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

Learn how a catheter urine culture helps diagnose catheter-associated UTI, how samples are collected, and what colony counts, pyuria, resistance, and positive results mean.

Catheter Urine Culture Test: Catheter-Associated UTI and Culture Meaning

Learn how a chlamydia and gonorrhea urine NAAT works, how to collect first-catch urine, what positive or negative results mean, and when follow-up testing is needed.

Chlamydia and Gonorrhea Urine NAAT Test: STI Screening, Positive Result, and Meaning

Learn how to collect a clean-catch urine culture, reduce contamination, handle the sample correctly, and understand mixed flora, colony counts, repeat testing, and accurate results.

Clean-Catch Urine Culture Test: Sample Collection, Contamination, and Accurate Results

Diagnostics

Home Diagnostics Page 37

Learn what the CA 15-3 blood test measures, common reference ranges, its role in metastatic breast cancer monitoring, recurrence limits, and benign causes of high results.

Cancer Antigen 15-3 (CA 15-3) Blood Test: Breast Cancer Monitoring, Recurrence,...

Learn what high CA 19-9 means, how pancreatic and bile duct cancers use this marker, why jaundice causes false elevations, and how Lewis status affects results.

Cancer Antigen 19-9 (CA 19-9) Blood Test: High Levels, Pancreatic Cancer,...

Learn what the CA 27.29 blood test measures, its common reference range, how it is used in breast cancer monitoring, recurrence limits, and reasons for high results.

Cancer Antigen 27.29 (CA 27.29) Blood Test: Breast Cancer Monitoring, Recurrence,...

Understand CA-125 blood test results, including normal ranges, high levels, benign causes, ovarian cancer monitoring, recurrence trends, and follow-up.

Cancer Antigen 125 (CA-125) Blood Test: High Levels, Ovarian Cancer Monitoring,...

Learn what a CEA blood test measures, typical reference ranges, benign causes of high CEA, and how serial CEA levels help monitor colorectal cancer and recurrence.

Carcinoembryonic Antigen (CEA) Blood Test: High Levels, Colon Cancer Monitoring, and...

Learn how the chromogranin A blood test is used for neuroendocrine tumors, why PPIs and benign conditions raise CgA, and how serial results are interpreted.

Chromogranin A Blood Test: Neuroendocrine Tumors, High Levels, Medication Effects, and...

Learn how circulating tumor cell blood tests detect tumor cells, what CTC counts mean, how they relate to prognosis and monitoring, and how CTCs differ from ctDNA.

Circulating Tumor Cell (CTC) Blood Test: Cancer Monitoring, Tumor Cells in...

Learn what complexed PSA measures, what high cPSA may mean, how it differs from total and free PSA, and how modern prostate-cancer risk assessment uses PSA results.

Complexed PSA Test: High Levels, Prostate Cancer Risk, and PSA Result...

Learn what CYFRA 21-1 measures, typical reference limits, causes of high levels, and how this lung cancer marker may help with NSCLC prognosis and monitoring.

CYFRA 21-1 Blood Test: Lung Cancer Marker, High Levels, and Disease...

Learn what the DCP/PIVKA-II blood test measures, why levels rise, how vitamin K affects results, and how DCP supports HCC risk assessment and treatment monitoring.

Des-Gamma-Carboxy Prothrombin (DCP) Test: Liver Cancer Marker, High Levels, and HCC...

Learn how the free PSA test and percent free PSA help refine prostate cancer risk, what common percentage ranges mean, what affects results, and when follow-up is needed.

Free PSA Test: Percent Free PSA, Prostate Cancer Risk, and PSA...

Understand what a gastrin blood test measures, why gastrin can be high, how gastrinoma and Zollinger-Ellison syndrome are diagnosed, and how PPIs affect results.

Gastrin Blood Test: Gastrinoma, Zollinger-Ellison Syndrome, High Levels, and Stomach Acid

Learn what an HE4 blood test measures, why HE4 can be high, how kidney function affects results, how ROMA combines HE4 and CA-125, and how the marker is monitored.

HE4 Blood Test: Ovarian Cancer Risk, High Levels, ROMA Score, and...

Learn how hCG is used as a tumor marker for germ cell tumors, what high levels can mean, how AFP and LDH fit into staging, and why serial hCG trends matter.

Human Chorionic Gonadotropin (hCG) Tumor Marker Test: Germ Cell Tumors, High...

Learn what an immunofixation blood test detects, how IgG, IgA, IgM, kappa, and lambda results are interpreted, and what a monoclonal protein may mean.

Immunofixation Blood Test: Monoclonal Protein, Immunoglobulin Type, Myeloma, and Meaning

Learn how the inhibin A tumor marker test is used for granulosa cell tumors, what high levels can mean, typical ranges, and how trends help with monitoring.

Inhibin A Tumor Marker Test: Granulosa Cell Tumors, High Levels, and...

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