Do, Duc Hoang
(2005)
DEVELOPMENT AND EVALUATION OF A MINOR GROOVE BINDER-TAQMAN RT-PCR ASSAY FOR THE DETECTION OF HUMAN RHINOVIRUS IN NASAL ASPIRATE SPECIMENS.
Master's Thesis, University of Pittsburgh.
(Unpublished)
Abstract
A one-step real-time reverse transcription PCR (RT-PCR) assay was developed for the detection of human rhinovirus (RV) in nasal aspirate (NA) specimens. A set of primers was designed to amplify a 120-base target in the 5' non-coding region of RV RNA. The amplicon was detected using TaqMan minor groove binder (MGB) probes and ABI Prism sequence detectors.Three probes were evaluated using stock suspensions of 15 RV strains representing serotypes 1A, 2, 3, 7, 17, 21, 29, 37, 39, 40, 58, 62, 66, 72, and 87. The initial probe that was designed, Pic-4, detected 11 of the RV strains. Probe Pic-6 was designed with a degeneracy at the first 5' nucleotide to accommodate a target-probe mismatch. Although Pic-6 improved the detection limit for some strains, detection of RVs containing multiple mismatches was unsatisfactory. Probe Pic-5 was designed with nucleotide degeneracies at three positions to account for multiple mismatches. Pic-5 detected 14 of the RVs at a lower limit of detection of 0.00001 to 0.01 50% tissue culture infectious dose (TCID50) equivalents/PCR reaction. RV-87, recently classified as an enterovirus (EV), was not detected with any of the probes.The assay with Pic-5 detected 30 plus or minus 50 copies of a plasmid containing an RV-2 target sequence. The assay yielded negative results when nucleic acids from human cells, EVs, and a panel of bacteria and viruses found in the human nasopharynx were tested. The assay with Pic-4 yielded a detection limit of 1.0 TCID50 equivalents/PCR reaction in both neat and supernatant NA specimens seeded with RV-2.A total of 48 NA samples obtained from children with cold-like symptoms were tested by the RT-PCR assay with probe Pic-5; 8 (16.7%) of the samples were positive.In conclusion, the real-time TaqMan MGB RT-PCR assay with Pic-5 is rapid, sensitive, and specific and has the capability of detecting at least 14 serotypes of RV. The public health significance of this study is that the RT-PCR assay with Pic-5 may lead to improvements in the diagnosis and surveillance of RV infections, and to a better understanding of the ability of RV to cause serious infection in immunocompromised patients.
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Details
| Item Type: |
University of Pittsburgh ETD
|
| Status: |
Unpublished |
| Creators/Authors: |
|
| ETD Committee: |
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| Date: |
13 September 2005 |
| Date Type: |
Completion |
| Defense Date: |
18 July 2005 |
| Approval Date: |
13 September 2005 |
| Submission Date: |
25 July 2005 |
| Access Restriction: |
No restriction; Release the ETD for access worldwide immediately. |
| Institution: |
University of Pittsburgh |
| Schools and Programs: |
School of Public Health > Infectious Diseases and Microbiology |
| Degree: |
MS - Master of Science |
| Thesis Type: |
Master's Thesis |
| Refereed: |
Yes |
| Uncontrolled Keywords: |
real-time RT-PCR; human rhinovirus; TaqMan MGB probes |
| Other ID: |
http://etd.library.pitt.edu/ETD/available/etd-07252005-130338/, etd-07252005-130338 |
| Date Deposited: |
10 Nov 2011 19:53 |
| Last Modified: |
15 Nov 2016 13:46 |
| URI: |
http://d-scholarship.pitt.edu/id/eprint/8581 |
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