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Galactosemia
This test looks for enzyme activity in the red blood cells in your child's blood. It can help diagnose galactosemia, a rare inherited disorder.
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Gamma-Glutamyl Transpeptidase
This test looks for an enzyme called gamma-glutamyl transpeptidase in your blood. The test can help find out whether you have liver damage.
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Gastrin
This test measures the amount of the hormone gastrin in your blood. You may need this test if you have recurrent peptic ulcers.
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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.
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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.
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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.
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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.
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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.
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Gonorrhea Culture (Discharge)
This test looks for the bacteria that cause gonorrhea, a sexually transmitted disease.
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