Automated processing, extraction and detection of herpes simplex virus types 1 and 2: A comparative evaluation of three commercial platforms using clinical specimens.

Background: Recently, automated platforms have been developed that can perform processing, extraction and testing for herpes simplex virus (HSV) nucleic acid on a single instrument.

Objectives: In this study, we compared three commercially-available systems; Aptima/Panther (Hologic, San Diego, CA), ARIES (Luminex Corporation, Austin, TX), and cobas 4800 (Roche Molecular Systems Inc, Pleasanton, CA) for the qualitative detection of HSV-1/2 in clinical samples.

Study Design: Two-hundred seventy-seven specimens (genital [n=193], dermal [n=84]) were submitted for routine HSV-1/2 real-time PCR by a laboratory developed test.

Borrelia mayonii sp. nov., a member of the Borrelia burgdorferi sensu lato complex, detected in patients and ticks in the upper midwestern United States.

Lyme borreliosis (LB) is a multisystem disease caused by spirochetes in the Borrelia burgdorferisensu lato (Bbsl) genospecies complex. We previously described a novel Bbsl genospecies (type strain MN14-1420T) that causes LB among patients with exposures to ticks in the upper midwestern USA. Patients infected with the novel Bbsl genospecies demonstrated higher levels of spirochetemia and somewhat differing clinical symptoms as compared with those infected with other Bbsl genospecies.

Testing for Herpes Simplex Virus in Low-Volume Cerebrospinal Fluid Samples: Comparison of Three Protocols To Optimize Detection.

Detection of herpes simplex virus 1 and 2 (HSV-1 and HSV-2) in cerebrospinal fluid (CSF) is a medical emergency and requires rapid, sensitive testing. However, the volume of CSF received for microbiological studies may be limited, especially from young children. In this study, we compared three testing protocols to our routine real-time PCR method to determine the most sensitive approach for detecting HSV-1 and HSV-2 in low-volume (≤100 μl) CSF.

Direct Detection of Influenza A and B Viruses in Less Than 20 Minutes Using a Commercially Available Rapid PCR Assay.

We compared an FDA-cleared rapid (<20 min) PCR assay (Cobas Liat; Roche Diagnostics) to our routine influenza A and B real-time PCR assay (Simplexa Flu A/B & RSV Direct; Focus Diagnostics) using respiratory swabs (n = 197). The Cobas Liat influenza A and B assays demonstrated sensitivities of 99.2% (123/124) and 100% (23/23), respectively, while showing a specificity of 100% for each target.

Rapid and direct detection of herpes simplex virus in cerebrospinal fluid by use of a commercial real-time PCR assay.

Central nervous system infection due to herpes simplex virus (HSV) is a medical emergency and requires rapid diagnosis and initiation of therapy. In this study, we compared a routine real-time PCR assay for HSV types 1 (HSV-1) and 2 (HSV-2) to a recently FDA-approved direct PCR assay (Simplexa HSV-1/2 Direct; Focus Diagnostics, Cypress, CA) using cerebrospinal fluid samples (n = 100). The Simplexa HSV-1/2 assays demonstrated a combined sensitivity and specificity of 96.

Conversion to the COBAS AmpliPrep/COBAS TaqMan CMV Test for management of CMV disease in transplant recipients.

Testing of clinical plasma specimens by the COBAS AmpliPrep/COBAS TaqMan CMV Test (CAP/CTM CMV), COBAS AMPLICOR CMV MONITOR Test (CAM CMV), and a laboratory-developed assay using analyte-specific reagents (LC CMV) demonstrated substantial result bias for CAP/CTM CMV versus CAM CMV (r = 0.436) and CAP/CTM CMV versus LC CMV (r = 0.773).

Viral detection using a multiplex polymerase chain reaction-based assay in outpatients with upper respiratory infection.

We evaluated a commercial multiplex polymerase chain reaction (PCR) assay in a cross-sectional study among 81 adult and pediatric outpatients-40 cases with upper respiratory infection symptoms and 41 asymptomatic controls-from February to April 2008. Two specimens (throat swab and nasal swab) from each participant were tested using the EraGen MultiCode-PLx Respiratory Virus Panel that detects 17 viral targets. Throat swabs were also tested for Group A Streptococcus (GAS) by PCR.

Precision across the analytical measuring range of a quantitative real-time PCR assay for cytomegalovirus detection among three clinical laboratories.

This study measured the precision of a quantitative laboratory-developed real-time PCR test for cytomegalovirus performed at three different clinical laboratories that use the same methodology. The overall standard deviation (adjusted for analyte level) was 0.18 log(10) copies/ml, and there was no significant relationship between standard deviation and analytical measuring range.