According to an article in Nature, the researchers who developed an inexpensive, reliable field test for the Ebola virus are frustrated by the delay they've seen in actually having that test deployed. Known as the Corgenix test after the company which developed it, this diagnostic tool "could not replace lab confirmation, but it would allow workers to identify infected people and isolate them faster, greatly reducing the spread of disease," according to infectious-diseases physician Nahid Bhadelia. However, though it's been approved both by the US FDA (for emergency use) and the World Health Organization, its practical use has been hampered by country-level regulations. Just why is unclear; the test seems to be at least as effective as other typical tests, and in some ways better. One concern was that the test might fail to detect the virus in some cases of Ebola. But the independent field-validation1 (in Sierra Leone) shows that the kit was as sensitive at catching cases as the gold-standard comparison — a real-time polymerase chain reaction (RT-PCR) test that amplifies and detects genetic sequences that are specific to Ebola in blood and other bodily fluids.
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