FEB 13, 2018 5:12 AM PST

Blood Test for Candida Yeast Rapidly Improves Diagnosis Time

WRITTEN BY: Kara Marker

Diagnosing a dangerous infection by a fungal yeast that often devastates hospital patients is now faster and more efficient. The new blood test has the potential to improve patient outcomes, as the mortality rate for those with fungal yeast infections of the blood is 40 percent.

Micrograph showing candida. Credit: Wikimedia user Nephron

From the University of Pittsburgh, researchers introduce the T2Candida Panel, the first diagnostic test for candidemia, an infection of the bloodstream by a species of yeast called Candida.

There are 17 unique types of Candida, and candidemia is one of the four most common bloodstream infections in U.S. hospitals. A Candida infection in the blood is particularly dangerous because the yeast can spread to other parts of the body, like the eyes, liver, or brain. Signs and symptoms of such an infection include fever, chills, rash, low blood pressure, muscle aches, vision changes, headaches, and abdominal pain.

The new blood test has already been cleared by the FDA, after being tested in a clinical trial called DIRECT2. It works like this: blood is taken from a patient suspected to have candidemia and placed into a machine that uses magnetic resonance to scan the blood for the five most common Candida species. Results are available in five hours.

This is in comparison to the previous methods used to diagnose candidemia, where doctors collected a blood sample and cultured it in the lab to see if any yeast grew. However, this technique fails to detect Candida in nearly half of all infections, and it takes at least two days to receive positive results. An additional day or two is then needed to identify the specific strain of Candida.

Why is it beneficial for hospital patients (or anyone) to know if they have candidemia as soon as possible? Most importantly, an expedited diagnosis allows infected patients to receive the right medication quickly. This both treats the infection and cuts down on drug resistance because they aren’t given the wrong drug.

“For candidemia, we know that the shorter the time to administering an active antifungal medication to a patient, the higher the survival rate,” explained lead author Cornelius J. Clancy.

In the DIRECT2 trial, researchers evaluated 152 patients diagnosed with candidemia via blood culture test. The T2Candida test accurately diagnosed 89 percent of the patients, and it proved to be significantly more likely to be positive than blood cultures in patients with recent candidemia.

Future trials might include a study of whether T2Candida decreases the amount of time it takes for infected patients to receive antifungal treatment and if the new diagnostic test improves patient outcomes.

“The next steps should be evaluating it in direct clinical practice and determining if its use truly speeds up antifungal treatment, cuts unnecessary drug prescribing, results in better patient outcomes and is cost-effective, and identifies large numbers of candidemia cases that are currently not detected by blood cultures,” Clancy said.

The present study was published in the journal Clinical Infectious Diseases.

Sources: American Thoracic Society, University of Pittsburgh Schools of the Health Sciences

About the Author
  • I am a scientific journalist and enthusiast, especially in the realm of biomedicine. I am passionate about conveying the truth in scientific phenomena and subsequently improving health and public awareness. Sometimes scientific research needs a translator to effectively communicate the scientific jargon present in significant findings. I plan to be that translating communicator, and I hope to decrease the spread of misrepresented scientific phenomena! Check out my science blog: ScienceKara.com.
You May Also Like
APR 01, 2020
Microbiology
How Two Types of Tests for COVID-19 Work
APR 01, 2020
How Two Types of Tests for COVID-19 Work
There are a couple of different kinds of tests that researchers will be developing and clinicians will be using to disru ...
APR 04, 2020
Clinical & Molecular DX
AI Finds New Predictive Markers of Covid-19 Severity
APR 04, 2020
AI Finds New Predictive Markers of Covid-19 Severity
Researchers and healthcare organizations are putting their heads together to consider how technology could ease the ever ...
APR 21, 2020
Clinical & Molecular DX
Skin Deep: Handheld Device Sees the Earliest Signs of Cancer
APR 21, 2020
Skin Deep: Handheld Device Sees the Earliest Signs of Cancer
Researchers have developed a handheld device that can image structures under the skin at resolutions 100 times greater t ...
APR 22, 2020
Drug Discovery & Development
Only 3% of COVID-19 Antibody Tests Approved by FDA
APR 22, 2020
Only 3% of COVID-19 Antibody Tests Approved by FDA
So far, only 3% of at least 90 COVID-19 antibody tests in the US have been approved by the Food and Drug Administration ...
JUN 09, 2020
Clinical & Molecular DX
The Key to Unlocking Next Generation Wearable Biosensors Is Under the Sea
JUN 09, 2020
The Key to Unlocking Next Generation Wearable Biosensors Is Under the Sea
Wearable biosensors are the latest trend in health and diagnostic technologies — keeping track of everything from ...
JUN 26, 2020
Cardiology
Drug for Osteoporosis Linked to Increased Risk of Adverse Cardiovascular Events
JUN 26, 2020
Drug for Osteoporosis Linked to Increased Risk of Adverse Cardiovascular Events
In a recent study done by Jonas Bovijn, MBChB, MSc, DLSHTM, of the Big Data Institute at the University of Oxford’ ...
Loading Comments...