What types of diagnostic tests are there currently for the detection of Covid 19?
The PCR test is a test that detects the presence of genetic material from Covid 19. This test replicates the virus genome through Polymerase Chain Reaction (PCR). This test makes it possible to detect a fragment of the genetic material of a pathogen. The processing and interpretation of the samples in a microbiology laboratory is necessary and, due to its sensitivity, it is the reference test for the detection of the virus.
This test actively detects the presence of the infection since its function is to detect the presence of proteins in the virus. The result is obtained within a few minutes of sample collection.
These tests detect the different specific antibodies against the coronavirus. That is, they detect the individual's immune response against Covid 19. These tests detect the two types of antibodies: IgM and/or IgG:
IgM: immunoglobulins (antibodies). They appear in the early phase of the infection and disappear within a few weeks.
IgG: immunoglobulins (antibodies): They appear in the late phase of the infection and remain for a long time, sometimes years.