What is Rapid antigen card test??
It detects by rad system
SAES COV 2 VIRAL Protein
It is a bed side test & therefore often
used at hospitals & N homes particularly as “on Admission tests” for Covid
19 antigen (viral proteins) . Covid-19 Rapid Antigen Card - It detects SARS COV
2 Viral Proteins by Immunochromatograpy
Card for rapid detection of antigens from samples collected from samples collected
from nasopharynx and nose. The test card
contains antibodies against SARS COV 2
Viral Proteins. It detects viral RNA
with fair degree of accuracy by card test at bedside by 30 minutes. No need of
costly machines like RT PCR test machine . There will be two bands like UPT
card if she/he carries virus. The said test card is impregnated at factory
with contains antibodies against SARS
COV 2 Viral Proteins . Appearance of two
bands implies antigen positivity in
nasopharynx / nasal cavity of the subject.
But limitation is this
tets can’t detect disease Free State. When one is being discharged from Hospital
after an attack of Covid-19 then we have to confirm her/his diseases-free state
by RT PCR which is 100% sensitive.
Indications of Rapid Antigen Test ( RAT) : A) All women/men preoperatively B) All Gynae /Obstet new admissions C) Mass
screening in a locality at low cost . But when someone is test card +ve he/she
should be sent to either quarantine (if asymtomatic) or Covid hospital (if symptomatic) . Those who were in contact with her/him they
also should be tested by Rapid card test. Till date few companies are
manufacturing this test card in our countries and we have to import from other courtiers.
Admittedly it is low cost test very useful for mass screening.
What is PCR tets? PCR test is the best method and near 100% sensitive as opposed to 80-85%
sensitive in card test as described above. There are of three kinds like :-1) Open RT PCR=Many companies do it by kit.
2) CB NAAT 3) TRUE NAT.
It takes 24-48 hours to
detect the antigen (Viral antigen) .
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