XstremeMD XstremeMD

XstremeMD is your #1 choice for fast, reliable, and effective Occupational Health guidance. With upwards of 500,000 tests administered across 10+ states, you can trust XMD to provide comprehensive, convenient care to your community. Access nurses 24-7 through our online screening tool, get individual testing at our clinic locations, or request group testing at a facility of your choosing. With PCR test results in as little as 12 hours or antigen test resulted in 15 minutes, employees can return to work quickly and safely. Let us help assess your needs and develop your emergency plan of action.

Two types of tests – diagnostic tests and antibody tests.

A diagnostic test can show if you have an active coronavirus infection. Currently there are two types of diagnostic test which detect the virus – molecular tests, such as PCR tests, that detect the virus’s genetic material, and antigen tests that detect specific proteins on the surface of the virus. If detected you should take steps to quarantine or isolate yourself from others.

An antibody test looks for antibodies that are made by your immune system in response to a threat, such as a specific virus. Antibodies can help fight infections. Antibodies can take several days or weeks to develop after you have an infection and may stay in your blood for several weeks or more after recovery. Antibody tests may not be accurate in diagnose an active coronavirus infection nor does it mean that you are immune to the future infection.




Also know as...

Diagnostic test, viral test, molecular test, nucleic acid amplification test (NAAT), PCR test, LAMP test
Rapid diagnostic test
(Some molecular tests are also rapid tests.)
Serological test, serology, blood test, serology test

How the sample is taken...

Nasal or throat swab
Nasal or throat swab
Finger stick or blood draw

How long it takes to get results...

Same day or up to a 72 hours
One hour or less
Same day or 1-3 days

Is another test needed...

This test is typically highly accurate and usually does not need to be repeated.
Positive results are usually highly accurate but negative results may need to be confirmed with a molecular test.
Sometimes a second antibody test is needed for accurate results.

What it shows...

Diagnoses active coronavirus infection
Diagnoses active coronavirus infection
Shows if you’ve been infected by coronavirus in the past

What it can’t do...

Show if you ever had COVID-19 or were infected with the coronavirus in the past
Definitively rule out active coronavirus infection. Antigen tests are more likely to miss an active coronavirus infection compared to molecular tests. Your health care provider may order a molecular test if your antigen test shows a negative result but you have symptoms of COVID-19.
Diagnose active coronavirus infection at the time of the test or show that you do not have COVID-19

Molecular diagnostic tests that detect the genetic material of the virus are commonly used for diagnosing COVID-19 or active coronavirus infection. But no test is 100% accurate all of the time. Some things that may affect the test’s accuracy include:

  • You may have the virus, but the swab might not collect it from your nose or throat.
  • The swab or mucus sample may be accidentally contaminated by the virus during collection or analysis.
  • The nasal or throat swab may not be kept at the correct temperature before it can be analyzed.
  • The chemicals used to extract the virus genetic material and make copies of the virus DNA may not work correctly.

Antigen Test usually provide results diagnosing an active coronavirus infection faster than moleculartests, but antigen tests have a higher chance of missing an active infection. If an antigen test shows a negative results indicating that you do not have an active coronavirus, your health care provider may order a molecular test to confirm the result.

Antibody Test may provide quick results, but should not be used to diagnose an active infection. Antibody tests only detect antibodies the immune system develops in response to the virus, not the virus. It can take days to several weeks to develop enough antibodies to be detected by a test.


Contact us with any questions you may have regarding COVID Testing


1028 Forum Dr. | Broussard, LA 70518
Phone: 877-520-2911

Hours of Operation:
Monday - Friday
7:30 AM - 4:30PM


8730 South wy 181 Unit G | Kenedy, TX 78119
Phone: 337-704-0930

Midland MMU

2600 FM 307 | Midland, TX 79706
Phone: 337-205-8165


4281 HWY 285 N | Orla, TX 79770
Phone: 337-205-9314

Hours of Operation:
7:00 AM - 7:00PM
After Hours Charges Begin at 5:00 PM