B

Bacterial meningitis PCR (Streptococcus pneumoniae, Neisseria meningitidis, Haemophilus influenzae, Streptococcus agalactiae(Group B streptococcus), Listeria monocytogenes)

Barbiturates (U)

Barbiturates and Sedatives (B)

Bartonella group PCR (B. henselae, B. quintana, B. bacilliformis, B. clarridgeiae, B. elizabethae)

B cell receptor gene rearrangement (IgH)

B cell Subsets

Becker Muscular Dystrophy: DMD Deletion/Duplication Analysis

Becker Muscular Dystrophy: DMD Sequencing

Beckwith-Wiedemann Syndrome: CDKN1C Sequencing

Beckwith-Wiedemann Syndrome: Methylation and Copy Number Analysis

Beckwith-Wiedemann syndrome: UPD11 Analysis

Benzodiazepine Identification (U)

Benzodiazepines (U)

Benzodiazepine Screen, Serum or Plasma (B)

Beta-Galactosidase Enzyme Activity, Fibroblasts

Beta-Galactosidase Enzyme Activity, Leukocytes

Beta-Glucosidase Enzyme Activity, Fibroblasts

Beta-Glucosidase Enzyme Activity, Leukocytes

Beta-Glucuronidase Enzyme Activity, Fibroblasts

Beta-Glucuronidase Enzyme Activity, Leukocytes

Beta-Hexosaminidase Enzyme Activity, Total and % Hexosaminidase B, Fibroblasts

Beta-Hexosaminidase Enzyme Activity, Total and % Hexosaminidase B, Leukocytes

Beta-Hexosaminidase Enzyme Activity, Total and % Hexosaminidase B, Serum

Beta-Mannosidase Enzyme Activity, Fibroblasts

Beta-Mannosidase Enzyme Activity, Leukocytes

Biotinidase Enzyme Activity, Plasma/Serum

BK virus quantitative PCR

Bloom Syndrome: BLM Recurrent Mutations

Bloom Syndrome Testing

Bone Marrow Transplant Monitoring

Bordetella pertussis PCR

Branchio-Oto-Renal Syndrome: EYA1 Deletion/Duplication Analysis

Branchio-Oto-Renal Syndrome: EYA1 Sequencing

Breath Hydrogen

Broad Spectrum Drug Screen

Burkholderia cepacia complex genomovar PCR typing

Busulfan