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Test Code MPRP Mycoplasma (Mycoplasmoides) pneumoniae with Macrolide Resistance Reflex, Molecular Detection, PCR, Varies

Useful For

Diagnosing infections due to Mycoplasma (Mycoplasmoides) pneumoniae

 

Assessing macrolide susceptibility

Reporting Name

M pneumoniae PCR + Macrolide Reflex

Specimen Type

Varies


Necessary Information


Specimen source is required.



Specimen Required


The high sensitivity of amplification by polymerase chain reaction requires the specimen to be processed in an environment in which contamination of the specimen by Mycoplasma (Mycoplasmoides) pneumoniae DNA is unlikely.

 

Submit only 1 of the following specimens:

 

Specimen Type: Swab

Supplies:

-Culturette (BBL Culture Swab) (T092)

-BD E-Swab (T853)

-Nasopharyngeal Swab (Nylon Mini-Tip Swab) (T861)

-Culture Swab-Liquid Stuarts/Single Swab (NP Swab) (T515)

-M4-RT (T605)

Sources: Throat, nasal, or nasopharyngeal

Container/Tube:

Preferred: Culture swab transport system (Dacron or rayon swab with aluminum or plastic shaft with either Stuart or Amies liquid medium)

Acceptable: Culture transport swab (Stuart's media) or place swab in M4, M4-RT, M5, M6, universal transport media, or ESwab

Specimen Volume: Swab

Collection Instructions:

1. Collect specimen by swabbing back and forth over mucosa surface to maximize recovery of cells.

2. Place swab back into swab cylinder.

 

Specimen Type: Fluid

Sources: Pleural, pericardial, cerebrospinal

Container/Tube: Sterile container

Specimen Volume: 0.5 mL

 

Specimen Type: Respiratory

Sources: Bronchial washing, bronchoalveolar lavage, tracheal secretions, sputum

Container/Tube: Sterile container

Specimen Volume: 1 mL


Specimen Minimum Volume

Respiratory specimen: 0.5 mL
Other specimen types: See Specimen Required

Specimen Stability Information

Specimen Type Temperature Time Special Container
Varies Refrigerated (preferred) 7 days
  Frozen  7 days

Reject Due To

Cotton or calcium alginate-tipped swab, wooden shaft swab, transport swab containing gel or charcoal
Port-a-Cul tube
Anaerobic fluid vials
Dry swab (no pledget or sponge)
Respiratory fluid specimens placed in VTM or placed on a swab and then into VTM (M4-RT, M4, or M5)
Body fluid specimens placed in VTM or placed on a swab and then in VTM (M4-RT, M4, or M5)		 Reject

Reference Values

Negative

Method Description

Throat swabs, nasopharyngeal swabs, sputum, bronchoalveolar lavage fluid, pericardial/pleural/chest fluid, and cerebrospinal fluid specimens are processed according to specimen type. Nucleic acid is extracted by the MagNA Pure 96 automated instrument (Roche Applied Science). A specific target sequence from Mycoplasma (Mycoplasmoides) pneumoniae is targeted by primers and fluorescence resonance energy transfer hybridization probes. The LightCycler 480 II instrument (Roche Applied Science) amplifies and monitors the development of target nucleic acid sequences after the annealing step during polymerase chain reaction (PCR) cycling. Detection of the M pneumoniae target is performed through melting curve analysis using the LightCycler software.(Schmitt BH, Sloan LM, Patel R. Real-time PCR detection of Mycoplasma pneumoniae in respiratory specimens. Diagn Microbiol Infect Dis. 2013 Nov;77[3]:202-205)

 

If M pneumoniae is detected, a reflexive PCR is performed to assess the 23S ribosomal RNA gene region of M pneumoniae and predict macrolide resistance based on the most common, high-level point mutations at positions 2064 and 2063 via melting curve analysis. While the wildtype genotype will display a stable melting temperature, the designed primer and probe combinations will be highly sensitive to single nucleotide mutations resulting in a cooler (left shift) melting temperature value.(Rothstein TE, Cunningham SA, Rieke RA, Mainella JM, Mutchler MM, Patel R. Macrolide resistance in Mycoplasma pneumoniae, Midwestern United States, 2014 to 2021. Antimicrob Agents Chemother. 2022 Apr 19;66[4]:e0243221)

Day(s) Performed

Monday through Sunday

Report Available

3 to 4 days

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Test Classification

This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. It has not been cleared or approved by the US Food and Drug Administration.

CPT Code Information

87581

LOINC Code Information

Test ID Test Order Name Order LOINC Value
MPRP M pneumoniae PCR + Macrolide Reflex 29257-3

 

Result ID Test Result Name Result LOINC Value
SRCMP Specimen source 31208-2
62394 M. pneumoniae PCR 29257-3

Method Name

Rapid Polymerase Chain Reaction (PCR) using Light Cycler and Fluorescent Resonance Energy Transfer (FRET)

Forms

If not ordering electronically, complete, print, and send a Microbiology Test Request (T244) with the specimen.

Reflex Tests

Test ID Reporting Name Available Separately Always Performed
RPMPM M. pneumoniae Macrolide Resist PCR Yes No

Testing Algorithm

If positive, Mycoplasma pneumoniae macrolide resistance will be performed at an additional charge.

Secondary ID

62394