Ebola Test Gives False Negatives

Why It’s Important to Do Multiple Tests On Suspected Ebola Victims Before Releasing Them

Newsweek notes:

On July 15, Omeonga’s boss walked into his office at St. Joseph Catholic Hospital in Monrovia, Liberia full of worry. The hospital director told Omeonga he had shaken hands with a man who was later diagnosed with Ebola, and now he was feeling ill—the director had been vomiting, had a headache, and was running a high fever. But two days later, when the diagnostic test came back negative, that worry was banished, and Omeonga and his colleagues began caring for the director as they would a typhoid or malaria patient. “We wore gloves, but we were not very strict at all.”

A week later, the director’s symptoms got worse, and he was tested again. This time, it came back positive for Ebola—the first test was a false negative [i.e. the test erroneously showed that the person did not have Ebola, when he did].  Suddenly, everyone who had cared for him was a possible Ebola case. The hospital became a quarantine zone. The director died on August 2, the same day Omeonga began to feel sick. Of the 20 health workers who had been in contact with him during that week, 15 came down with Ebola a short while later, including Omeonga. Nine of Omeonga’s colleagues died. He and five others survived.

It’s not just tests done in Africa which may be problematic …

According to American authorities, the PCR test is the “gold standard”.  As Emory University notes:

The gold standard of testing for the Ebola virus in the United States is the Centers for Disease Control and Prevention (CDC) RT-PCR assay, which was used by Emory physicians in deciding when to discharge two patients from Emory University Hospital.

CDC Director Tom Friedan said last week:

Testing for Ebola is highly accurate.  It’s a PCR test of blood.

But the Journal of Clinical Microbiology noted in 2002 that the PCR test can yield false negatives for viral hemorrhagic fevers such as Ebola:

A confirmation by PCR would have been missed if we had not tested a duplicate sample.

And the U.S. Department of Defense noted in August (on page 2):

The possibility of a false negative result should especially be considered if the patient’s recent exposures or clinical presentation indicate that Ebola Zaire virus infection is likely, and diagnostic tests for other causes of hemorrhagic illness are negative.

It is essential that Ebola tests be run more than once before any suspected Ebola victims are released.

See this for more life-saving tips for healthcare authorities, administrators and doctors.

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  • jadan

    Asymptomatic vectors and false positives! The picture just gets darker….

    • Chris Sky

      wayyyyyy too many convenient “coincidences” surrounding this outbreak. Almost like somebody is DIRECTING it….

  • Bananas999

    An ounce of prevention is worth a pound of cure.

    There is no cure for Ebola.

    The best cure available now is to keep Ebola out of the U.S.

    Sign this common-sense petition to:

    “Have the FAA ban all incoming and outgoing flights to
    ebola-stricken countries until the ebola outbreak is contained”


  • Rishat

    Thanks to Allah I have immunity against many infectious diseases e-mail: riszhat@gmail.com treatment for Ebola using me to develop a vaccine against Ebola Russia, Republic of Tatarstan, Almetyevsk

  • Dwelk

    Unless a person has millions upon millions of Ebola virus in his body there is no reason to consider him sick. Or, that he’ll become sick. Can the PCR test allow doctors to say how much virus is in the person’s body? Maybe Kary Mullis can answer that question. He’s the man who invented the PCR test. He has stated that, “Quantitative PCR is an oxymoron.” That means it can’t tell a doctor how much Ebola is ii a person’s body. It can’t tell you if the person is sick or if he’ll become sick.

  • Norbert

    If the head of the CDC were to discover that he was infected with Ebola, would his story change?

    If the test to see if a person has Ebola isn’t foolproof,
    And if there is no cure,
    Then prevention of infection is the only safe bet …

    And if transmission requires contact with bodily fluids of an infected person …

    Then keep infected persons away from me.

    Does not the Constitution of the United States place the burden of securing the borders on the Federal Government?

    How did these people get into office? We elected them.

  • Margaret Sharp

    The infected nurse’s dog is in quarantine but don’t they know that animals do not get the virus BUT that they can be CARRIERS!!! He is probably carrying. Anyone coming in contact with him may be at risk because he was in close contact with the nurse.

  • SteveDK

    The 2002 study was on Yellow Fever Virus not Ebola Virus.