Detection of Pneumocystis jirovecii (previously Pneumocystis carinii) DNA.
Pneumocystis jirovecii (formerly Pneumocystis carinii) is an opportunistic fungal pathogen which can cause pneumonia in patients with impaired immune systems, such as those with AIDS or who are receiving immunosuppressive drugs. It is important to accurately identify the presence of Pneumocystis in immunocompromised patients for the implementation of proper therapy. Conventional diagnosis is based on direct microscopic examination of respiratory specimens, but these methods can often be difficult to interpret. PCR allows for more definitive detection of Pneumocystis in clinical specimens.
The UWMC Molecular Diagnosis laboratory utilizes a real-time PCR protocol with fluorescent probes targeted to the Kex-1 gene to identify Pneumocystis jirovecii in clinical specimens. Pneumocystis PCR detects Pneumocystis jirovecii with higher sensitivity than the broad-range fungal PCR. The analytic sensitivity is 6 genomes per PCR reaction.
DNA extraction, nucleic acid purification, polymerase chain reaction (PCR), sequencing
Acceptable specimens are listed below. Please see Molecular Microbiology Specimen Submission for complete specimen collection and handling instructions.
Shipping/Handling
Acceptable Specimens
*Mycobacterium avium complex DNA Detection [MAVDNA] can be ordered on sputum
**Fungal PCR reflex NGS [FUNDNA] and Fungal DNA Detection by PCR (without reflex to NGS) [NRFDNA] may have interference due to some lots of eSwabs which have been found to contain Saccharomyces cerevisiae DNA, resulting in false positive detection. Clinical correlation and/or retesting with a different collection method is advised. The detection of S. cerevisiae from eSwab specimens can interfere with our ability to rule out other fungal DNA.
Unacceptable Specimens
Optimal Quantity:
Please note: We do not need a separate specimen aliquot for each test ordered. Only a single specimen aliquot or block of optimal quantity is necessary for performing multiple tests. If multiple aliquots or blocks of optimal quantity are sent, up to 2 will be pooled.
Please see Molecular Microbiology Specimen Submission for complete specimen collection and handling instructions.
UWMC/HMC: Store and send fresh tissue/fluid specimens refrigerated, if specimen storage and transport will exceed 8 hours, freeze at -20°C. Freeze all fresh tissue/fluid specimens at -20°C upon arrival in UW Molecular Microbiology.
UW-MT |
Microbiology, Molecular Diagnostics
206-520-4600 ---------------------------------------- Shipping Address Attn: Molecular Microbiology Performing Lab Address Clinical Microbiology Lab, NW177 |
Contact Information Please e-mail us with any questions or comments you may have. Your inquiry will be answered as soon as possible. email: molmicdx@uw.edu The Molecular Microbiology lab is open from Monday-Friday, 7am-4pm PDT. Billing inquiries and requests for faxed reports can be made to our Client Services Department at (206) 520-4600 or (800) 713-5198. For results or other inquiries, we can be reached by phone at the following numbers:
For assistance during weekends, holidays and after hours, please contact Lab Medicine Resident at (206) 598-6190 |
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