Service diagnosing COVID-19
Hospital Ochoa remains committed to providing the best healthcare during these difficult times. Detection and diagnosis is critical in the fight againstSARS-CoV-2,which is why we offerthe most up-to-date tests available.
The different types of tests for diagnosing COVID-19 are:
Antigen test (rapid test).
This is the most popular at present due to its quick turnaround time and potential for large-scale testing.The back of the nose or throat is swabbed, and the collected sample is tested for proteins on the surface of the virus called antigens.
Molecular test (RNA or PCR).
This is the most reliable type of test, and results are available to the patient within 48 hours. Like in the antigen test, a sample of mucus from the back of the nose or throat is collected with a swab. The sample is tested by amplifying the virus’ RNA in order to detect it.
Antibody test (serology test or blood test)
Our immune system reacts to the invasion of any virus or microorganism by generating antibodies. There are 2 types of antibodies related to the detection of Covid-19:
IgM. The body’s immune system employs them during the infection’s most acute phase. They typically become undetectable weeks or months after an infection.
IgG. These antibodies are typically still present in the bloodstream months or even years after an infection. This facilitates early detection in the event that the virusreappears, andcan thus act more quickly inattacking it once again.
These tests are carried out by means of a blood test and are divided into rapid antibody tests (with a 30% positive/negative margin of error and which do not quantify or specify which type of immunoglobulin it is: G or M); and those carried out with the ELISA Technique (Enzyme-linked Immunosorbent Assay)which enjoy a greater accuracybecause the particular antibody is linked to a specific enzyme. In addition, this test quantifies and specifies the type of immunoglobulin.