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CCP
This blood test checks for an amino acid called citrulline. It is present when you have rheumatoid arthritis.
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CD4-CD8 Ratio
This test looks at the ratio of 2 important types of white blood cells in your blood. If you have HIV, the results can help your health care provider know how strong your immune system is.
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Chlamydia Trachomatis (Swab)
This test looks for bacteria that cause chlamydia, the most common sexually transmitted infection in the U.S.
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Chlamydia Trachomatis (Urine)
This test looks for the bacteria that cause chlamydia, the most common sexually transmitted infection in the U.S.
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Chloride
This test will find out how much chloride is in your blood and help your health care provider find out if you have a kidney problem.
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Chloride (Urine)
This test measures the amount of chloride in your urine. Knowing your chloride level is useful if you have a condition called metabolic alkalosis.
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Complement C3 (Blood)
This test measures the amount of C3 proteins in your blood. C3 proteins are part of your immune system. This test can help diagnose lupus.
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Complement C4 (Blood)
This test measures the amount of a protein called C4 in your blood. You may need this test if your doctor suspects that you have an autoimmune disease.
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Complete Blood Count
This test looks at the number and size of various blood cells to help judge your overall health or to diagnose a range of illnesses, from anemia to infections.
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