AlgorithmsSensitivity and SpecificityLimit of DetectionPolymerase Chain ReactionReproducibility of ResultsBacteriological TechniquesEvaluation Studies as TopicBiosensing TechniquesSignal Detection, PsychologicalReagent Kits, DiagnosticImmunoassayEnzyme-Linked Immunosorbent AssayMolecular Diagnostic TechniquesEarly Detection of CancerVirologyMolecular Sequence DataDNA PrimersNucleic Acid Amplification TechniquesDNA, BacterialFalse Positive ReactionsBase SequenceTime FactorsFecesDNA ProbesChromatography, High Pressure LiquidSequence Analysis, DNASubstance Abuse DetectionImmunoenzyme Techniques