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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

Dr. Suzanne Galli
76 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?

No: You can have a quick test done in the office with relatively accurate results almost immediately. A culture can also be done as backup. When you are treated within 10 days of first symptoms the known bad side effects of untreated strep can be stopped. If not you run these risks and can be a continuous carrier of the germ. ...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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I saw a doctor yesterday and was diagnosed with pharyngitis. Still waiting for strep throat culture to come back. Pain is worst. Can hardly swallow.?

I saw a doctor yesterday and was diagnosed with pharyngitis. Still waiting for strep throat culture to come back. Pain is worst. Can hardly swallow.?

Can be other things.: Strep is not the only cause of pharyngitis. Herpes simplex, chlamydia, ebv, corynebacterium diptheriae, and many others can also cause it. That is one reason why the strep check swab is done, as well as a strep culture. Your doctor should be able to do this/should have done this rapid check so you can start treatment if positive. See your doctor soon if it gets worse for empiric treatment. ...Read more

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My throat was swollen. Doc did a throat culture and it is strep throat c.Left toncel still soreaalong with left side of my tounge and left ear. Normal?

My throat was swollen. Doc did a throat culture and it is strep throat c.Left toncel still soreaalong with left side of my tounge and left ear. Normal?

Yes: Strep infections can infect all the moist tissues in the nose and pharynx (throat). Pain and swelling are cardinal signs of inflammation. The bacterial infection can extend to the eustachian tube that connects the inner ear to the back of the throat--swelling closes the tube and causes earache. See your doc for antibiotics. Use: neilmed sinus rinse, salt water gargle and Ibuprofen 600 mg 4 x a day. ...Read more

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I have a sore throat, fever, and white patches on my tonsils. My throat culture came back as group b strep. How does one treat group b strep?

I have a sore throat, fever, and white patches on my tonsils. My throat culture came back as group b strep. How does one treat group b strep?

Not an issue for: Self treatment. Please consult your doctor for a prescription. See this site for more info.
http://www. Cdc. Gov/groupbstrep/index. Html. ...Read more

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Sore, red throat, hurts to swallow. My doc said it's not strep based on throat culture. I saw him 2x. It's day 12 & there's no improvement.?

Sore, red throat, hurts to swallow. My doc said it's not strep based on throat culture. I saw him 2x. It's day 12 & there's no improvement.?

Sore throat: Throat cultures are a good way to diagnose strep throat, but sometimes they can be falsely negative. It is very likely that your infection is viral, in which case you could have symptoms for 2 weeks or more. You can use symptomatic treatment such as sprays and lozenges. Warm tea with honey can help. Tylenol (acetaminophen) or Motrin for pain. Seek medical care if you develop fever or difficulty breathing. ...Read more

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She had amoxicilin, cefdinir, augmentin (amoxicillin and clavulanate).Then rapid strep positive but throat culture negative. Symptoms are not clearcut. Should we continue clindamycin?

Questionable?: The fact that the culture, which is the gold standard for diagnosis of strep throat, is negative, tells me the infection is resolved, at least most of it. I cannot instruct you to stop the antibiotic since there are many details I would need to know. However, the fact that there are still symptoms after 4 antibiotics makes me question if this is really strep infection. Follow up with her doctor. ...Read more

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They did a throat culture for strep at the ER today but came back negative I have white blisters on back throat a red dots on roof of my mouth.?

They did a throat culture for strep at the ER today but came back negative I have white blisters on back throat a red dots on roof of my mouth.?

Blisters: One consideration is herpangina, like hand foot mouth disease. This viral illness can be quite tender, and resolves without treatment. A physician would also inquire about sick contacts, fever, fatigue, runny nose or other exposures. More severe disease cannot be excluded without further details. ...Read more

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Throat culture neg for strep, white patches on tonsils getting larger, red spots on palate, chills, nasal congest, severe body pain. Mono not likely.

Throat culture neg for strep, white patches on tonsils getting larger, red spots on palate, chills, nasal congest, severe body pain. Mono not likely.

Throat infection: It is not possible to provide you any relevant response given that you have provided no information not even your age let alone your medical history. Please discuss your concerns with your parents or your doctor or restate your question with all relevant information. ...Read more

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What are the odds of having a false positive rapid strep test 3x in a row?

What are the odds of having a false positive rapid strep test 3x in a row?

+ strep: Extremely unlikely. The test is pretty good (70-90%) at detecting the disease and very good at confirming it (90-100%). ...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