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Doctor insights on: Rapid Strep Test Vs Throat Culture

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I have white spots on the sides of my throat & back of my tongue. I had a rapid strep test done 3 days ago that came back neg. What could this be?

I have white spots on the sides of my throat & back of my tongue. I had a rapid strep test done 3 days ago that came back neg. What could this be?

Any pain/discomfort.: You don't say if you're having pain or discomfort from this. If you're having pain then this could be another type of infection, including thrush. If it's not painful, it could simply be a coated tongue that needs cleaning. Consult your dentist or an ENT to resolve the issue. ...Read more

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Dr. Mark Pack
74 Doctors shared insights

Throat Culture (Definition)

This is usually done when a throat infection is suspected. One will take a swab of the throat and then place the swab in culture medium. This will then be grown on a culture plate to determine if/what type of bacteria is causing the infection. Both viruses and bacteria ...Read more


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If the rapid strep test is done on the second day of sore throat in a 12 year old are the results accurate or should wait more days?

If the rapid strep test is done on the second day of sore throat in a 12 year old are the results accurate or should wait more days?

Can be: Any of these tests can be falsely negative at any point, but they can be positive as soon as there are living strep germs present in the throat. Many practitioners will do a backup culture any time the quick test is negative to be sure not to miss a case. You have ~ 10 days from the first symptoms to treat & prevent rheumatic fever. ...Read more

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My 11yo recd neg rapid strep test yesterday. Her throat hurts so bad she can barely swallow. She is very congested. Can virus cause bad sore throat?

My 11yo recd neg rapid strep test yesterday. Her throat hurts so bad she can barely swallow. She is very congested. Can virus cause bad sore throat?

Yes, viruses can: Definitely cause very painful sore throats. Did her doctor also do an "overnight" culture in their office or sent out to a lab? Does she have fever? Is she drinking fluids? If she's not drinking well and it continues, I would recommend calling the doctor again and possibly getting her re-checked. ...Read more

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29/f. Sore throat for 3 days, no congestion, low grade fever, negative rapid strep test. Should I be concerned about mono? When should I get tested?

29/f. Sore throat for 3 days, no congestion, low grade fever, negative rapid strep test. Should I be concerned about mono? When should I get tested?

Not necessarily: While mono is one of many viral causes of soar throats, I would not be overly concerned about not testing. The luck among us get it in childhood when it acts like most other "bugs" & fades quickly. If so you are immune. Adults tend to suffer major symptoms & may be bedbound for a few weeks. The inflamed tonsils of mono are some of the nastiest I have ever seen. If your not that sick, just take it easy ...Read more

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Negative for rapid strep test today. Signs of strep are apparent. Mainly a stuffy nose, fever, and sore white throat, not super tired. Mono or strep?

Negative for rapid strep test today. Signs of strep are apparent. Mainly a stuffy nose, fever, and sore white throat, not super tired. Mono or strep?

Probably strep: Sounds more like strep, rapid strep cultures are only 70% accurate and separate longer test is much advisable along with the rapid, strep patients also sometimes state having the feeling of a golf ball inthere throat which is usually a hallmark sign for the condition, mono patients are usually excessively tired and have swollen cervical lymph nodes or it could very well just be a bad virus. ...Read more

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10 days of augmentin cured my son's low grade fever and throat pain but his rapid strep test is still +ve, my son has no symptoms, what do u recommend?

10 days of augmentin cured my son's low grade fever and throat pain but his rapid strep test is still +ve, my son has no symptoms, what do u recommend?

Explanation: Unfortunately it happens and called strep carrier. Difficult to rid of this especially in winter time. What really helpful is : gargle the mouth with hypertonic saline: 1 teaspoon of salt in 8 oz of water Or camomile tea, ocean beach for vacation. And radical treatment is removing of tonsils. ...Read more

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Is it common to test positive for strep a on rapid strep and a month later test positive for strep c on throat culture?

Is it common to test positive for strep a on rapid strep and a month later test positive for strep c on throat culture?

Not unusual: Group C strep is frequently found on throat culture and is part of the normal flora that reside in the throat. As such, it's role as the causative agent in any given case of pharyngitis is often uncertain. There is no evidence Group C strep causes Acute Rheumatic Fever. *If it is cultured in an asymptomatic individual there is no necessity to treat it unless it's suspected as the cause. ...Read more

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Yellow Blisters back of throat >1 year. All tests negative Nil tonsils Throat cultures clean Nil Epstein-Barr Strep Thrush Herpes Etc Help please?

Allergy related: Probably this is "cobblestoning, " which is the finding of streaks of lymphoid tissue on the posterior pharynx (back of the throat). It's caused by chronic allergy type symptoms. A doctor should be able to confirm that with a look in the back of the throat. If your allergies are bad, there are various treatments that may help, such as antihistamines or even immunotherapy. Try an allergist if needed ...Read more

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Is it still possible to have strep throat even if throat culture is negative?

Is it still possible to have strep throat even if throat culture is negative?

Probably viral: A throat culture is considered the "gold standard" when it comes to diagnosing strep throat. It is very accurate and specific to strep throat. It is more likely that you have a viral throat infection. It should last around 5-7 days. Ibuprofen, salt water gargles and rest should help. ...Read more

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Positive strep throat culture, is floxacin an antibiotic for this?

Positive strep throat culture, is floxacin an antibiotic for this?

Not one I would use: This class of drugs have a broad range of effects against many types of germs but I find no listing for strep throat. It is not used in kids and rarely used in most simple infections. Since strep is universally sensitive to the penicillins, and other inexpensive medications, it is one I would never use for strep throat. ...Read more

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Took a throat culture today and said I either have strep throat or mono. How will I know which one I have?

One or Other or Both: You can't have either a strep throat or mononucleosis. You can have one or the other or both. A rapid strep test or a throat culture will tell whether or not you have a strep throat. A mono spot test or ebv antibody panel will show whether or not you have mono. If you have both do not take Ampicillin or Amoxicillin because either will cause a rash 90% of the time. ...Read more

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Angioedema the past 3 weeks. He went to er 3x because of swelling. Dr did a throat culture mon, came back+for strep. No other sx. His dr doesn't know?

Angioedema the past 3 weeks. He went to er 3x because of swelling. Dr did a throat culture mon, came back+for strep. No other sx. His dr doesn't know?

Angioedema: Greetings, Angioedema needs further work up. First, are there any new medications? New foods? Any changes? A Possible allergy sensitivity could exist. A thorough blood evaluation is also needed. An Allergist, Immunologist or an ENT specialist could all perform this work up. An epipen (epinephrine) is a good idea since it is a recurring issue. Also he may benefit form taking a daily antihistamine like Allegra. ...Read more

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Where could my 16 yr old daughter have gotten the pseudonomas bacteria? A strep throat culture came back positive for it.

Where could my 16 yr old daughter have gotten the pseudonomas bacteria? A strep throat culture came back positive for it.

They're everywhere: And they are probably not causing her sore throat. Many folks harbor the little critters without their causing any problems. Like most other bacteria, it's only when they grow out of control or manage to invade that you'll get disease. ...Read more

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After having a sore throat for over a week, is it too late to have a throat culture done for strep throat? My two grandsons have strep throat?

After having a sore throat for over a week, is it too late to have a throat culture done for strep throat? My two grandsons have strep throat?

Sore: Sore throat is a fairly common symptom associated with many illnesses. Most of the time it resolves on its own without any other issues. Occasionally it can be due to something more serious that needs treatment. Reasons to seek care are: - any fever - since it could be strep and you can't tell without an exam/testing - if it lasts longer than 3 or 4 days - any difficulty opening your mouth - unable to swallow - severe pain - bleeding in the throat - redness or swelling on the outside of the neck - any difficulty breathing or noisy breathing since their sore throats have been going on for a week, they should see their doctor. As long as they still have symptoms, it is not too late for a throat culture. In the meantime, taking Ibuprofen or Acetaminophen for pain, drinking plenty of fluids such as hot tea/broth or cold liquids and a spoonful of honey can help. ...Read more

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Have white spots on my tonsils for 2 months l.I've been on clyndamycin & amoxicillin spots go away then come back. Strep neg & normal throat culture?

Have white spots on my tonsils for 2 months l.I've been on clyndamycin & amoxicillin spots go away then come back. Strep neg & normal throat culture?

Fungal Infection: Have white spots on tonsils for 2 months. Been on clindamycin and amoxicillin. Spots go away then come back. Strep neg and normal throat culture. Have you had labs done? Diabetes is in the differential as fungal overgrowth due to high sugar levels. Could also be fungal infection due to side effect of the antibiotic use. Need more information and conversation. ...Read more

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Positive throat culture for strep, normal CBC except for wbc 14000, CRP 15, ESR 18, patient is 6 years old with no symptoms, do you treat?

Positive throat culture for strep, normal CBC except for wbc 14000, CRP 15, ESR 18, patient is 6 years old with no symptoms, do you treat?

Yes: It is imperative to treat streptococcal throat infection to prevent damage to heart and kidneys. Please take the child to a doctor for treatment. ...Read more

Pharynx (Definition)

It is the connection between the mouth and the throat. The 3 parts are the oropharynx, nasopharynx, and hypo-pharynx. The pharynx leads into the ...Read more