Gonorrhea (Urine)

This test looks at your urine to find out whether you are infected with gonorrhea, a common sexually transmitted disease.

Gonorrhea (Swab)

This test looks for DNA of gonorrhea bacteria in a sample of bodily fluid. It can distinguish between an infection caused by gonorrhea and one caused by chlamydia.

Glucose (Urine)

This test is used to indirectly find out if your levels of blood sugar (glucose) are within a healthy range. It's used to monitor both type 1 and type 2 diabetes.

Two-Hour Postprandial Glucose

This blood test checks for diabetes. It is done after you eat a meal, so your healthcare provider can see how your body responds to the sugar and starch in the food.

Glucose Tolerance

This test is used to screen for prediabetes or diabetes. For the test, you drink a sweet beverage and then have your blood tested several times over the next few hours.

Glucose (Cerebrospinal Fluid)

This test measures the amount of glucose in the fluid that surrounds your brain and spinal cord. If you have a serious infection, your glucose level may be lower than normal.

Glucose (Blood)

A blood glucose test tells you whether your level of glucose is within a healthy range. Fasting plasma glucose is a common test for diagnosing diabetes.

Glomerular Filtration Rate

This test looks for changes in how well your kidneys are working. This is especially important if you have diabetes or high blood pressure.

Giardia Antigen (Stool)

This is a stool sample test to look for the parasite Giardia intestinalis. The parasite causes an infection of the small bowel.