Doctor insights on:
Can A Herpes Culture Test Be Wrong
Herpes culture: A positive culture means that the virus was present and actually grew and multiplied in the lab. The only way it would be wrong is if the made some kind of mistake with labeling your specimen and mixing it up with somebody else. That would be very very very rare for a culture. ...Read more
A herpes culture is a test performed in a microbiology or virology lab, where they use a swab from a suspicious area and try to "grow out" the herpes virus. This kind of test is notoriously inacurate- and a negative viral culture should not be taken as proof that you don't have the herpes virus. It should be followed up with blood testing to confirm that you have not ...Read more
Can you get a false positive herpes test if it's by swob? Should you get a blood test to know for a fact? And can folliculitis be mistaken for herpes?
False pos very rare: False positive tests for herpes simplex virus (HSV) (culture or PCR) are extremely rare and you probably don't need a blood test. However, a blood test still may be useful, e.g. to help tell new herpes from a recurrent outbreak, or if for some reason the virus type (HSV1 or 2) wasn't determined from the swab test. Folliculitis and herpes can be confused, but rarely by an experienced clinician. ...Read more
It's just random: Tests miss 5-10% of infections, more by urine, less by urethral or vaginal swab. Maybe other possibilities as well. Chlamydia clears on its own in a few weeks to months, so current testing is negative. Or s/he received an antibiotic for chlamydia (and didn't admit it) or for another infection, curing chlamydia or interfering with the test. Partner(s) of infected person need Rx, even w/ neg tests. ...Read more
Can you get a vaginal staph infection again? Or could it be something else? All std test came back negative both times can it be a false negative?
If my uti urine test came out negative. Is it possible to test positive for a uti culture test? Also can doctors see stds or stis in this culture test
Here are some...: Urinalysis (under microscope) of properly collected fresh urine should give an fair accurate indication for bacterial UTI or not, but ultimate confirmation is urine culture with properly collected urine. And either one should correlate with clinical picture and suspicion. But, testing for STD/STI like chlamydia & gono should be done with the first (dirty) part of urine, differing from testing UTI. ...Read moreSee 1 more doctor answer
Yes: If it was a skin test that resulted in a welt formation its less likely to be false positive. The tests where blood is drawn an they count histamine response to different agents often gives results that you do not have in daily living. The large plasma panels often give results stating wheat allergy, nut allergy, tomato allergy yet you eat bread, nuts and pizza every day. It may not be true ...Read more
Confusing question: I suppose the question is about missing a throat infection with gonorrhea or chlamydia. The positive strep test does indicate that strep is present. If you did not tell the doc you might have been exposed to these germs through oral contact, the specialized testing would not have been done to see if they were also present. The simple strep test does not look for the additional agents. ...Read more
Herpes: No; Cell culture or PCR test may give a false-negative result if the sores have begun healing or if you are recently infected. It takes several weeks for HSV antibodies to show up in the blood. PCR and cell culture tests show that you have been exposed to the virus at some point. Your doctor may choose to do both or neither based on the physical examination. ...Read more
Yes and no....: A blood test can tell whether someone is infected with herpes simplex virus type 1 (HSV1) and/or HSV2. It doesn't tell if genital or oral; that requires symptoms and/or testing of an outbreak for the virus. Most HSV1 is oral, some genital; almost all HSV2 is genital. The tests aren't perfect, but if you have symptoms that suggest GH or an infected partner, testing can be helpful. ...Read more
Cryptococcus: a few q's: how hard is it to be diagnoses with this fungus? Would all blood tests be positive, or could a false positive be LIKELY?
Cryptococcus: The usual species is C. neoformans. Encapsulated strains are diagnosed by detection of cryptococcal antigen in CSF, sputum and urine. Blood cultures may be positive. India ink of the CSF is a microscopic method of diagnosis. Diagnosis may be more difficult if infected with C. gatti or a non-encapsulated strain but this is very uncommon. False negative results are also rare. ...Read more
Gonorrhea: Yes that's how we typically diagnose GC. ...Read more
Not exactly: It is not so much the blood test is wrong, as it might be too early after infection to show up. Culture only positive if "catches" the organism to grow. There are a couple of types of herpes (hsv1/hsv2) as well. Usual to repeat blood work after 3-6 months if equivocal results. ...Read more
There are different types of herpes infections; herpes simplex infection of mouth (gingivostomatitis) and lips (labialis) are the most common. Others include genital herpes, and herpes zoster. Herpes infection could very mild to very dangerous depending on the type and location of the body affected. I ...Read more
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