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Articles tagged with: Diagnostic assays/markers/tests/test kits (See also Screening tests) –

Hemophilia diagnosis: how to test, what to know

March 2017—True, hemophilia is no longer commonly known as the “royal disease” (as it was when several generations of European rulers suffered from it). But in a January webinar, Dorothy M. Adcock, MD, gave some royally important suggestions regarding the laboratory diagnosis of hemophilia A and B.

HbA1c in CVD treatment: farewell to one size fits all

March 2017—Anchor. Central pillar. Cornerstone. It would be hard to find a weighty synonym for “linchpin” that hasn’t been used to describe HbA1c’s role in diabetes diagnosis and management since 2010, when the assay was recognized by key standard-setting organizations as the equal of fasting glucose and oral glucose tolerance testing in diabetes and prediabetes testing.

Latest TB testing guide set forth by ATS, CDC, IDSA

March 2017—Testing for latent Mycobacterium tuberculosis infection and active tuberculosis disease remained relatively unchanged for many years. Screening for latent infection depended on an initial positive tuberculin skin test, and evidence for active TB required a positive culture for M. tuberculosis complex. New tests altered this picture in the past five years. For diagnosis of latent infection, interferon-gamma release assays have taken a major role. And nucleic acid amplification testing is becoming a mainstay for establishing a diagnosis of TB.

One bug or prix fixe? Respiratory pathogen testers weigh in

February 2017—With the number of rapid, accurate molecular assays for respiratory pathogens growing, microbiology laboratories have more options than ever. They include, among others, Meridian Bioscience’s Illumigene assays for group A Streptococcus and pertussis and its newest assay, Mycoplasma Direct, as well as Alere’s assays for influenza A/B, respiratory syncytial virus, and Streptococcus on its i molecular platform. No longer are laboratories limited to inaccurate rapid antigen tests, weeks-long culture, or multi-pathogen panels.

Buzz, prospects build for heparin-induced thrombocytopenia test

January 2017—U.S. physicians and laboratories are anticipating the early 2017 launch of the HemosIL HIT-Ab(PF4-H) assay, which detects antibodies associated with heparin-induced thrombocytopenia. The new test from Instrumentation Laboratory, Bedford, Mass., is the first fully automated, on-demand assay for HIT.

With metagenomic sequencing, no pathogen can hide

January 2017—Detecting pathogenic organisms with PCR has become a staple of the clinical microbiology laboratory, so much so that it seems like it has always been there. A more advanced molecular technique—unbiased metagenomic next-generation sequencing—will increasingly become a part of infectious disease diagnosis because it has several advantages over PCR. While it will be demanding to perform at first, it, too, may become a standard method in the clinical microbiology laboratory.

Procalcitonin passes automation hurdle

December 2016—Matt Damon in Interstellar. Julia Roberts in The Player. Gene Hackman in Young Frankenstein. When movie stars appear in uncredited parts, it’s usually for a cameo, not a leading role. But in diagnostics, an uncredited or off-label use of an assay might be its main use—possibly even its most clinically important use.

Up next for MALDI-TOF mass spec: AFB, molds

November 2016—Behold the humble API strip, made of plastic, with multiple miniature test chambers, interpreted with the aid of a color chart, and long a mainstay of microbiology laboratories.

Epi proColon fires up hopes of capturing screening dodgers

November 2016—When a Hollywood producer forecasts box office receipts, or a public health official contemplates action against a deadly but preventable cancer, there’s one hypothetical that might make both shudder: What if you held a screening and nobody came?

Sequencing goes deep to find rubella in uveitis patient

November 2016—Metagenomic deep sequencing, or MDS, has scored another coup in the diagnosis of an unexplained disease in a patient who had already had extensive workup with all other available tools. MDS had been used in 2014 to detect unsuspected leptospirosis in a critically ill encephalitis patient, enabling appropriate treatment and full recovery. Now some of the same clinical scientists at the University of California San Francisco Medical Center who helped diagnose that patient have identified rubella virus infection in the eyes of a patient with bilateral chronic intraocular uveitis that had been misdiagnosed as idiopathic inflammation for 16 years.

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