Biological Markers / Agents

C-Peptide C-reactive protein Cadmium CALCIFEDIOL (25-hydroxy) Calciferol (Vitamin D2) Calcitonin (CT) Calcitriol (1, 25-dihydroxy) Calcium (Blood, Total) Calcium Oxalate Crystals (Urine) cAMP Candida Albicans Hyphae on Smear Carbon Dioxide Total Content (TCO2) Carbon Monoxide (CO) Carboxyhemoglobin(as HbCO) Carcinoembryonic antigen Carnosine (Urine) Carotenoids CD4 to CD8 CD4 to CD8 Ratio CD4(plus) T Cells Cephalin Cerebrospinal Fluid Immunoglobulin G (IgG) Cerebrospinal Fluid Lactate Dehydrogenase Cerebrospinal Fluid Leukocytes Cerebrospinal Fluid Lymphocyte Differential Cerebrospinal Fluid Monocyte Differential Cerebrospinal Fluid Neutrophil Differential Cerebrospinal Fluid Total Protein Ceruloplasmin cGMP Chlamydia trachomatis Chlamydial IgG Antibodies Chloride (Blood, Cl) Chloride (Stools, Cl) Chloride (Sweat, Cl) Cholecalciferol (Vitamin D3) Cholecystokinin (pancreozymin) Cholesterol (Total) Cholesterol Crystals (Urine) Choline ( total) Cholinesterase Chorionic gonadotropin Christmas factor Citric acid Citrulline Citrulline (Urine) Coagulation Bleeding Time Cobalamin (Vitamin B12) Cocarboxylase Complement Component C1q Complement Component C1r Complement Component C1s (C1 esterase) Complement Component C2 Complement Component C3( b1C-globulin) Complement Component C4 (b1E-globulin) Complement Component C4 binding protein Complement Component C5 (b1F-globulin) Complement Component C6 Complement Component C7 Complement Component C8 Complement Component C9 Complement Component factor B (C3 proactivator) Complete Platelet Aggregation in Response to Collagen, Thrombin, Ristocetin Compound S Condylomata Accuminata Typical Clinical Lesions Copper Coproporphyrin (Blood) Corticosteroids Corticosterone Cortisol Coxiella Burnetti Compliment Fixation (Complement Fixation for Q Fever) Coxsackie Virus A Serology (Specific Antibodies for Echovirus) Coxsackie Virus B Serology (Specific Antibodies for Coxsackie Virus B) Creatine (Blood) Creatine Kinase (CK) Creatine Kinase1 (CK-BB) Isoenzyme Creatine Kinase2 (CK-MB) Isoenzyme Creatine Kinase3 (CK-MM) Isoenzyme Creatinine (Blood) Creatinine (in Amniotic Fluid) Creatinine Clearance Rate Cryptococcus Neoformans on Smear Cryptosporidium Parvum (Cryptosporidiosis on Stool Smear) Cyanide Cysteine Cystine (Urine) Cystine Crystals (Urine) Cytomegalovirus Serology (Specific Antibodies for HHV5)