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Doctor insights on: Nasal Swab Test

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What is a nasal swab test?

What is a nasal swab test?

Nasal swab test: Swabbing the nasal mucosa is done for multiple reasons to test for allergy cells, infection or to look at the structure of the respiratory cells in the nasal cavity. ...Read more

Dr. Jack Mutnick
1,167 doctors shared insights

Nasal (Definition)

NaSal is a nasal preparation which is a kind of ...Read more


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How accurate are nasal swab flu tests? My sister had one yesterday @ our Dr 's ofc, but it was neg for flu. She has fever, chills, is very achy, etc.

How accurate are nasal swab flu tests? My sister had one yesterday @ our Dr 's ofc, but it was neg for flu. She has fever, chills, is very achy, etc.

Accurate if positive: If a nasal swab flu test is positive, it is a very reliable result. The swab is nasopharyngeal, meaning the swab goes to the back of the nose to get a mucus sample. If it is negative, it is only somewhat reliable, which means a person with a negative result may still have influenza. A rough estimate is that 1 out of 4 people with cold or flu symptoms, who test negative, actually do have influenza. ...Read more

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What is the definition or description of: pertussis in nasal swab (pcr test)?

What is the definition or description of: pertussis in nasal swab (pcr test)?

Pertussis was foun: It means that they found evidence that the bacteria that causes whooping cough was present in the nasal passages. This could mean you are a carrier of the disease (could infect others) or if you are having symptoms or repeated, serious cough, then you likely got infected by the pertussis bacteria and have whooping cough. ...Read more

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Do dermatologists do a nasal swab to test for acne?

Do dermatologists do a nasal swab to test for acne?

Occasionaly: If recommended, it may be on basis of specific bacteria found in the acne breakout areas. Some bacteria are carried within the nasal areas (like some staph and strep) are resistant to certain common antibiotics and can be problematic to treat. ...Read more

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I had nasal swab at doc today it showed A and B influenza. I went cause I had sinus pressure but no other symptoms..could test be wrong? I feel fine

I had nasal swab at doc today it showed A and B influenza. I went cause I had sinus pressure but no other symptoms..could test be wrong? I feel fine

Unlikely: Most cold symptoms now can be attributed to the flu although symptoms may vary from one to another. There is nothing 100% in medicine however but it is unlikely that the test result was wrong during this epidemic. In fact, testing is not recommended. ...Read more

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What would doing a nasal swab show?

What would doing a nasal swab show?

Germs you carry: The nasal membranes are a luxurious environment for germs to grow and end up on your fingers where they are spread to the environment.Screening nasal swabs is one way to find a source for staph or other germ that may not infect the carrier but might cause problems with the rest of their family. ...Read more

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Can you have MRSA if nasal swab comes back negative?

Can you have MRSA if nasal swab comes back negative?

Yes: It is still possible to have MRSA somewhere else on or in the body, even if it is not in the nose. However, the nose is a warm, moist place that is a useful place to look for the bacteria. ...Read more

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Tested +mrsa nasal swab before having surgery. What should I do?

Tested +mrsa nasal swab before having surgery. What should I do?

Tell your Dr.: Let your Dr. know. Depending on what kind of surgery you're having, your Dr. may want to use antibiotics. ...Read more

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9yrold. DX via nasal swab with influenza A. Is it accurate ?

9yrold. DX via nasal swab with influenza A.  Is it accurate ?

Rapid Influenza test: A nasal swab can be used to test for Influenza A. The rapid tests in the office can be helpful to diagnose Influenza. There are different brands of tests with varying sensitivities. See the site below for additional information
http://www.cdc.gov/flu/professionals/diagnosis/rapidlab.htm ...Read more

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What is the definition or description of: culture of nasal swab shows b. Pertussis?

What is the definition or description of: culture of nasal swab shows b. Pertussis?

Whooping cough: A positive culture means you are infected with the bacteria that causes whooping cough. This infection can kill babies, but in adults may manifest itself as a cold with a prolonged cough. ...Read more

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What is the definition or description of: pertussis found on nasal swab (dfa)?

What is the definition or description of: pertussis found on nasal swab (dfa)?

Rapid screening test: Dfa--direct fluorescent antibody test--a rapid diagnostic test done in the lab that takes 1-2 days to screen for pertussis (whooping cough). While much faster than a culture, this test is not as reliable. A nasal swab is inserted gently into the nostrils toward the throat (posterior nasopharynx). Then fluorescently labeled antibodies are exposed to the sample looking for pertussis antigens/markers. ...Read more

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Staph infection result from nasal swab what is it?

Staph infection result from nasal swab what is it?

Nothing special: The presence of staph on a nasal swab means only that you are carrying a strain in the lush mucoid environment where it can thrive. It doesn't do well on the dry skin surface for long periods of time. With it in your nose you could spread it to bug bits by scratching with contaminated fingers, or to door handles or other objects. Since most have no symptoms, nasal carriage allows it to spread. ...Read more

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If mrsa swab of infected area is negative after infection, is mrsa gone? Does an infection mean I am a carrier? Do I need to follow up w/ nasal swab?

If mrsa swab of infected area is negative after infection, is mrsa gone? Does an infection mean I am a carrier? Do I need to follow up w/ nasal swab?

MRSA carriage : There is s lot of media attention and literature on MRSA in recent yrs. resulting in some confusion. If you had MRSA diagnosed before, thud chances are that you are colonized with it. Thx good news is that you can decrease colonization with proper monitoring and treatment as indicated. ...Read more

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If a person has a nasal swab done & it cultures positive for "staph lugdunenis" but has no apparent signs of infection/illness what should be done?

Interesting : This coagulase negative staph (not a staph aureus) can, however, behave like one. If you have recurrent abscesses, it could be the cause. If not, no therapy clearly needed but intranasal Mupirocin (bactroban) is not unreasonable. ...Read more

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What does haemophilus influenzae on a nasal swab mean? Does it mean bacterial infection?

What does haemophilus influenzae on a nasal swab mean? Does it mean bacterial infection?

Nasal Swab: The three most common bacterial pathogens causing upper respiratory infection in adults are Moraxella catarrhalis, Streptococcus pneumoniae, and Haemophilus influenzae. A nasal swab is performed to culture and see what pathogen is causing problems. Haemophilus is a normal colonizer, but when isolated from sputum during infection it can indicate colonization has morphed to pathogenicity. ...Read more

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Swollen turbinates for last 6 months. Dx vasomotor Rhinitis. Positive nasal swab for Coag Negative staph. Could this be cause of Vasomotor Rhinitis?

Swollen turbinates for last 6 months. Dx vasomotor Rhinitis. Positive nasal swab for Coag Negative staph. Could this be cause of Vasomotor Rhinitis?

Definitely not: A culture like that is essentially useless. Staph CN organisms in this setting are 'just along for the ride' and have nothing to do with your sinus disease. That might have been different if a true pathogen was found (like Strep) but I'm pretty sure this is just what we call 'normal flora'. The sinuses are not a sterile place, so there are ordinary bacteria there. I would seek more about ALLERGY. ...Read more

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I was recently diagnosed with mrsa via groin swab. Took bactrim, (sulfamethoxazole and trimethoprim) no visible rash. Do I need to be retested and have nasal swab? Am I a carrier now?

I was recently diagnosed with mrsa via groin swab. Took bactrim, (sulfamethoxazole and trimethoprim) no visible rash. Do I need to be retested and have nasal swab? Am I a carrier now?

CONFUSING QUESTION: It is not clear why you had a swab done in your groin.If you had pustules or weepy lesions, mrsa is a reasonable cause. Once treated, you are unlikely to be a chronic carrier of the same germ.Retesting is not routine.Mrsa is so common now you could easily acquire a new strain within days or weeks. ...Read more

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Swollen nasal passages for three months.Nasal swab found large amount of coagulase negative staph. Doctor wants me to take keflex. I was on keflex for 5 years low dose to treat e-coli UTI which is now resistant to keflex.Wont staph be resistant to?

 Swollen nasal passages for three months.Nasal swab found large amount of coagulase negative staph. Doctor wants me to take keflex. I was on keflex for 5 years low dose to treat e-coli UTI which is now resistant to keflex.Wont staph be resistant to?

No: A person doesn't get resistent to an antibiotic, but a germ can. If you have not been on keflex in the past months it would likely kill off some of the germs on your body.However; I find coag negative staph to be a normal skin contaminant and not worthy of any treatment.Use of a simple OTC nasal steroid spray like rhinocort would help with most causes of nasal membrane swelling. ...Read more

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My cousin took the whooping cough test through a nose swab, how long does it take to get results?

My cousin took the whooping cough test through a nose swab, how long does it take to get results?

Depends: There are different answers to this question based on how the test was done but, in general, it will take 7-14 days for the full results but you can get a 'preliminary' result in ~7-10. ...Read more

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Flu test few days ago with swab inside my nose. Nose still feels sensitive. Could that swab cause an infection in my nose or am I worrying too much?

Flu test few days ago with swab inside my nose. Nose still feels sensitive. Could that swab cause an infection in my nose or am I worrying too much?

Possible: Probably just sill irritated, however a safe thing to do would be to get a bacitracin or polysporin cream and place in the nostril 2 or 3 times per day. The ointment will protect the area and help the irritation to heal if you do have an infection it would be the best first thing to do! Hope that helps! ...Read more

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What are the tests for nasal cancer?

What are the tests for nasal cancer?

Biopsy/histopath.: The diagnosis of this cancer is often made by lymph node biopsy, since the nasopharyngeal cancer ofthen presents with lymph node involvement. Otherwise, the patient will typically undergo a needle biopsy of this lesion, and when histopathologic information is available, a multidisciplinary discussion of the optimal treatment strategy will be undertaken. ...Read more

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How long do results take for the beta 2 transferrin test of my nasal fluid?

How long do results take for the beta 2 transferrin test of my nasal fluid?

Depends: The test itself can be done in one day. However, most hospitals need to send the sample to a reference lab and due to low volume the lab may not run the test every day.
Wish you good health. ...Read more

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What are the tests for cancer of the nasal cavity?

What are the tests for cancer of the nasal cavity?

Biopsy/histoath.: The diagnosis of this cancer is often made by lymph node biopsy, since the nasopharyngeal cancer ofthen presents with lymph node involvement. Otherwise, the patient will typically undergo a needle biopsy of this lesion, and when histopathologic information is available, a multidisciplinary discussion of the optimal treatment strategy will be undertaken. ...Read more

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PLEASE help; Beta Trace Protein negative but my nasal secretions glucose positive on dip tests. How reliable is Beta Trace protein test?Thank you!!

PLEASE help; Beta Trace Protein negative but my nasal secretions glucose positive on dip tests. How reliable is Beta Trace protein test?Thank you!!

CSF rhinorrhea: Beta transferrin in nasal fluid is the better marker to detect leakage of CSF into the nose. If it is negative your doctor may need to re-evaluate.Wish you good health! - Have a diet rich in fresh vegetables, fruits, whole grains, milk and milk products, nuts, beans, legumes, lentils and small amounts of lean meats. Avoid saturated fats. Drink enough water daily, so that your urine is mostly colorless. Exercise at least 150 minutes/week and increase the intensity of exercise gradually. Do not use tobacco, alcohol, weed or street drugs in any form.
Practice safe sex, if you have sex.
Get HPV vaccine ...Read more

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Tonsil out,biopsy,abundant Actinomyces colonies,still have post drip nasal, can this be caused by Actinomyces?What kind of test is there to find out?

Tonsil out,biopsy,abundant Actinomyces colonies,still have post drip nasal, can this be caused by Actinomyces?What kind of test is there to find out?

It's not: Actinomyces colonies are fairly common in tonsils whether or not they need to come out. Actinomyces is usually harmless but when it gets deep into tissues, it evokes abundant pus. It's not going to cause the edema and mild inflammatory of the upper respiratory tract that produces the drip. ...Read more

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This might not be your field of expertise. I have been suffering with continual nasal drip for years...have been to 3 ENTs and one allergist and gone through all sorts of tests and no one can tell me what is causing it or how to cure it...all they can tel

This might not be your field of expertise. I have been suffering with continual nasal drip for years...have been to 3 ENTs and one allergist and gone through all sorts of tests and no one can tell me what is causing it or how to cure it...all they can tel

Consider reflux: A reflux condition called laryngoesophageal reflux may cause a sense of post-nasal drips or mucus at the throat. Consider consulting a GI doc since neither your allergist nor ENT has been able to help you ...Read more