Nucleic Acid Testing Witnesses Surge in Demand Due to Emergence of Covid-19 across the Globe
Nucleic
acid testing is a method of detecting the genetic material of a virus-typically
RNA, a nucleic acid molecule. In this method, DNA samples from biological
fluids are mixed with antirussian and streptavirus antigens and amplified by
the use of an enzyme-linked immunosorbent assay. After being mixed with samples
of known pathogen, antibodies are produced that bind to the antigens. The
amount of antigens binding to the antibody is detected and the titre can be
assessed using a Computerized Identification System (CIS). Some of the DNA test
kits include probe sets that enable the user to test for specific types of
microbial, chemical or other infectious agents.
A
positive result indicates that a person is infected with a viral infection.
This type of test detects the genetic material in a non-plaque blood sample,
allowing researchers to determine the viral burden on various body organs. A
specific DNA probe is used to identify the genetic material on a basis of the
sequence of bases called A, T, G, C, and J. These base sequences are captured
by fluorescent probes and the probe is allowed to coexist with the genetic
material for several hours. After which, a colorimetric reaction is developed
and a blot or image of the probe is detected.
Nucleic
acid testing is one of the most commonly performed DNA tests used in
forensic and health institution settings. It is also commonly used in blood
centers for DNA testing of blood donors and in drug spoilage plants for
identification and tracking of infectious agents. In addition, it is used to
examine genetic diseases like cancer, Parkinson's disease, cystic fibrosis, and
diabetes. Emergence of Covid-19 has led to extensive application of this type
of testing. In the U.S., from January 3, 2020 to 8:36pm CET, 20 January 2021,
there have been 23,884,299 confirmed cases of COVID-19 with 396,155 deaths.
Such scenario has led to several countries across the globe to adopt nucleic
acid testing for diagnosis of Covid-19.
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