Stanford School of Medicine
Clinical Microbiology In the Department of Pathology
 Pertussis PCR combined with PFGE Strain typing
 Stanford laboratory has developed a number of innovative and cutting-edge molecular assays.

Molecular Microbiology

Bordetella pertussis nucleic acid amplification: This test, a real-time PCR assay that detects a unique insertion sequence, developed at Stanford, is the most sensitive test for detection of pertussis or parapertussis.  It is usually performed three times per week.  A special collection kit, available from the laboratory, is recommended.

Pulsed field gel electrophoresis bacterial strain typing: Bacteria are pelleted, DNA is treated with endonuclease enzymes, the strands are separated, and the DNA strands are subjected to varying waves of electrical current in a polyacrylamide gel.  The resulting band patterns are used to define the relatedness among strains.  Stanford has experience with numerous species, and we are especially knowledgeable about methicillin-resistant Staphylococcus aureus.  To submit strains for testing, contact Micro Lab at 650-723-5294 and ask for “Strain Typing Technologist” 

MecA gene detection by PCR: Under special circumstances, staphylococci with inconsistent phenotypical results can be tested for the presence of the mecA gene by real-time PCR.  Call the laboratory for the turnaround time for this test.

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