Doctor insights on:
Influenza On Rt Pcr Test
All antibody tests negative at around the 10 week mark except for RNA PCR test which says RNA detected, below 20 copies/ml instead of undetected.
Polymerase chain reaction is a method of finding a specific piece of dna and copying it over and over again until there is enough to study. The technique allows a scientist to detect very small amounts of dna in a swab sample then reproduce enough of it to study it. It is very sensisitive for detecting the presence of certain bacteria and is also used in doing other ...Read more
What is the accuracy of HIV testing (antibody and antigen) 6 weeks post PEP? I had all tests (Neg) including the pcr rna test at 22 days post pep.
HIV testing & RNA: Read the CDC updated recommendations on HIV testing. The rationale for this test being available is that HIV RNA is detectable in plasma before antibodies. A safe approach is to be tested after the eclipse period after potential exposure when no RNA nor antibodies to HIV can be detected. The RNA test is effective around 10 days after infection but seroconversion to antibodies may take 3 months. ...Read more
False pos ELISA HIV tests, neg naat viral load test, neg western blot, ifa and oraquicks neg too. All 15 months post risk event. What should I do?
Be grateful, man!: You've been obsessing about this too long. Sit down and talk with your physician about fears. If you'll forgive my frankness, talk with him/her and some wise adults (maybe even dad) about your emerging sexuality and how you've explored. By your age, we've all made mistakes. Embrace being a man, decide how you want love to be for you, and cherish adult love while resolving to be safe ; kind. ...Read more
Hiv DNA PCR dectected on 4/08/13 and antibody negative.Still now 6/3/13 8 weeks later still show HIV anitbody negative. What are your thoughts? Is the PCR a false positive?
Not necessarily: Is it really the dna or the RNA pcr? The dna qualitative pcr is the most sensitive test and may become positive months before antibody is detected. The quantitative RNA pcr that is used for monitoring also becomes positive early. Antibodies may not develop until 3 months from the infection. So, they may still develop. If you have not seen a HIV physician and are not on art, see one asap. ...Read moreSee 1 more doctor answer
Tb blood tested negative but TB skin testd positive, what is that mean? Continuous low grade fever, swollenlumpnodes, sore thrt, HIV PCR RNA negative.
Contradictory Tb tst: Quantiferon-TB(the blood test) and the PPD(skin test) are not recommended together. The quantiferon test has more sensitivity/specificity(measures for how good medical tests are) but the gold standard is culturing the bacteria from either tissue or sputum which should be attempted if their is clinical suspicion for TB infection. ...Read moreSee 1 more doctor answer
HIV: There is a chance that some individuals will take longer to develop detectable antibodies than the usual 2-8 weeks, therefore, if the initial negative HIV test was conducted within the first 3 months after possible exposure, repeat testing should be considered >3 months after the exposure occurred. ...Read more
4 month neg HIV test brief unprotected encounter with female is this conclusive 3 2ndgenantibodies test neg three rapids neg and a PCR undetectable ?
Probably, clarify.: The standard HIV test is first the elisa, for screening, and then the western blot for specificity. The western blot is done if the elisa test is positive. Nucleic acid tests, like pcr, are used in testing donor blood. Although the basic tests can be extermely accurate there is a chance of false negatives due to the up to 6 month seroconversion time it takes to make antibodies. See my comment. ...Read more
Very accurate: The elisa assay is one of the longest standing tests for antibodies to hiv. Positive results must be confirmed using western blot or other tests. If negative at 3 wks you should be retested at 3 and 6 months to be absolutely certain, but those latter tests are rarely positive if the 3 wk test was negative. Be safe. Have only protected sex until both partners assuredly negative, and monogamous. ...Read more
HIV NEGATIVE combo (antibody + antigen) tests at 4,6,10,13,14 weeks and PCR RNA VL UNDETECTED (14 weeks) white tongue, chronic pharyngitis. Am I HIV-?
You are HIV negative: Listen, man. Stop doing this to yourself. Get to an otolaryngologist and see if you have a post-nasal drip, maybe heavy snoring without realizing it, or some actual serious illness. Try scraping the stuff off your tongue with a piece of dental floss; if it's still white patches, ask your dentist's opinion also. But please get over these HIV fears. Maybe even be thankful for having shared love. ...Read more
Hep B Virus (HBV) DNA Qualitative (Detection) - COBAS TaqMan , Hep C RNA Detection by Taqman detection will be conclusive on 47 days? Any retest need?
No: Both Hepatitis B and C viruses may be detected 30 to 60 days after infection by antigen detection or 60-120 days with antibody testing. Direct HBV DNA and HCV RNA testing can potentially detect infection earlier, within 2-4 weeks after infection, so being tested at 47 days post-exposure with a negative nucleic acid test for both is very likely to be a true negative ...Read more
2 false pos ELISA HIV tests, all 1 1/2 years post exposure. Neg western blot, ifa, naat and 2 neg oraquick home tests. What is my HIV status? Help!
Likely negative: There is typically a "window" of 3-6 months after exposure where you could be HIV positive but test negative. Since you didn't get your testing until well after that, i'd say the confirmatory tests (western blot, ifa) are what you should go by. The elisa is very sensitive and can have false positives- that's why we rely on the confirmatory tests. I would consider your status to be negative. ...Read more
Pos ELISA and neg wb for HIV on 10/23/12. Neg ELISA on 11/16/12 and neg ELISA on 1/31/13. Was the first ELISA a false pos? Can HSV 2 cause false pos?
Tested false positive ELISA HIV test last month. Negative ifa and western blot and naat. 2 negative oraquick all 1 1/2 year post exposure. Hiv?
What is the window period for p42 antigen/ antibody dual 4th gen HIV test? And the window period for HIV RNA PCR test? When can it be conclusive?
See below: Please consult this site for a detailed answer. Nucleic acid tests are conclusive about a month after acquiring infection. http://www.sfaf.org/hiv-info/testing/hiv-test-window-periods.html ...Read more
What is the window pirod of HIV RNA quantitative real time PCR and HIV combo antibodies test cima?
Six Weeks: Most speacialist will consider CIMA test results coclusive at 6 weeks.But some request a repeat test at 12 weeks But it is un neccessary ...Read more
Fingered with 1day old superficial cut on finger.43daysimmunochromatograohy,49days CMIA antibody,53&57days DUO CMIA P24 all negative.Further test req?
Laceration: Not sure why you listed all of the blood tests. If you are immunocompromised for any reason (cancer treatment, chronic infection like HIV, or TB, or other chronic illness) an seemingly simple laceration can pose a risk of infection. Treatment superficial cut should include cleaning the wound daily with soap and water and coverage with an appropriate bandage. IF redness develops seek treatment. ...Read more
Nearly 100% accurate: Kindly check out this link. Take care and God bless you! http://i-base.info/guides/testing/test-accuracy-results-and-further-testing ...Read more
I did a DNA PCR test for HSV & i got the result: -humanes herpesvirus-dna ((typ 7, pcr) (eb) : negative limit of detection:100 copies/ml.So i'm clean?
Hsv-7 isn't detected: Your question will require some clarification since you stated being tested for herpes simplex virus, the result you describe tests for human herpesvirus type7, which cannot be detected by pcr testing below 100 copies per ml . Hhv-7 is not the same as hsv. Though theyboth belong to the same heresviridae family. ...Read more
HIV DUO 4th gen test at 35 & 47 came back negative , HIV RNA detection test at 35 days came back with NOT DETECTABLE, Will that conclusive?
Influenza is a viral respiratory infection that causes cough, fever, chills, sore throat, muscle aches and headache. While most healthy people suffer few complications from the flu, it can be deadly for pregnant women, babies and children, the elderly and those with weak immune systems. That's why it's so important to get the flu shot to protect yourself ...Read more
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