Prozone reaction - Study guides, Class notes & Summaries

Concerning antigen-antibody reactions, the prozone effect causes which of the following results? A. False positive B. False negative C. No reaction D. Mixed field reaction B. False negative The following characteristics are applicable to Interferon-Gamma Release Assays (IGRAs) except: A. Can be used in patients with active tuberculosis disease symptoms B. Preferable for patients who have received a bacillus Calmette-Guérin (BCG) vaccination C. Can be used instead of purified ...

ASCP MLS Exam Questions With Complete Solutions 2024 What feature is most often found with patients with a splenectomy on a Wright's stained blood smear? - ANSWER Howell-Jolly bodies Patients with antibody to the following antigen are immune to Hepatitis B: - ANSWER Surface antigen (HbSAg) Which two of the following tests are helpful for documenting previous Streptococcal throat and skin infections: - ANSWER ASO titer and Anti-DNase B In mass spectrometry, the "appearance potential"...

What feature is most often found with patients with a splenectomy on a Wright's stained blood smear? - Howell-Jolly bodies Patients with antibody to the following antigen are immune to Hepatitis B: - Surface antigen (HbSAg) Which two of the following tests are helpful for documenting previous Streptococcal throat and skin infections: - ASO titer and Anti-DNase B In mass spectrometry, the "appearance potential" is defined as the: - Minimum energy required for the appearance of a parti...

B; The correct answer for this question is 1300 mg/dL. The laboratorian performed a 1:4 dilution by adding 0.25 mL (or 250 microliters) of patient sample to 750 microliters of diluent. This creates a total volume of 1000 microliters. So, the patient sample is 250 microliters of the 1000 microliter mixed sample, or a ratio of 1:4. Therefore, the result given by the chemistry analyzer must be multiplied by a dilution factor of 4. 325 mg/dL x 4 = 1300 mg/dL. After experiencing extreme fatigue and...

ASCP MLS QUESTIONS WITH CORRECT ANSWERS 2023 What feature is most often found with patients with a splenectomy on a Wright's stained blood smear? Howell-Jolly bodies Patients with antibody to the following antigen are immune to Hepatitis B: Surface antigen (HbSAg) Which two of the following tests are helpful for documenting previous Streptococcal throat and skin infections: ASO titer and Anti-DNase B In mass spectrometry, the "appearance potential" is defined as the: ...

AAB MT IMMUNOLOGY REVIEWED TEST 2023/2024 Concerning antigen-antibody reactions, the prozone effect causes which of the following results? A. False positive B. False negative C. No reaction D. Mixed field reaction - CORRECT ANSWER-B. False negative The following characteristics are applicable to Interferon-Gamma Release Assays (IGRAs) except: A. Can be used in patients with active tuberculosis disease symptoms B. Preferable for patients who have received a bacillus Calmette-Guérin...

B; The correct answer for this question is 1300 mg/dL. The laboratorian performed a 1:4 dilution by adding 0.25 mL (or 250 microliters) of patient sample to 750 microliters of diluent. This creates a total volume of 1000 microliters. So, the patient sample is 250 microliters of the 1000 microliter mixed sample, or a ratio of 1:4. Therefore, the result given by the chemistry analyzer must be multiplied by a dilution factor of 4. 325 mg/dL x 4 = 1300 mg/dL. - Answer After experiencing extreme fat...

ASCP STUDY GUIDE FOR MLT EXAM with complete solutions. 1. DR antigens are found in which of the following systems?correct answers.HLA system 2. Which one of the stains below is used to detect separated nucleic acidscorrect answers.SyBr Green 3. Minimum inhibitory concentration (MIC) susceptibility tests should be performed against other beta lactam antibiotics on important S. pneumoniae isolates from blood cultures and other sterile body fluids when a MIC fo...

Precipitation correct answers soluble AG and soluble AB react to form an insoluble product (precipitate); less sensitive than agglutination Zone of Equivalence correct answers maximum precipitation occurs when concentrations of AG and AB are equal Prozone correct answers excess AB Postzone correct answers excess AG Prozone & Postzone correct answers ~AG & AB do not form precipitates, complex remain soluble ~False = results, dilute sample and repeat test 1-2 weeks ~serial dilutions ...

Precipitation correct answers soluble antigen and soluble antibody react to form an insoluble product (precipitate), less sensitive than agglutination Zone of equivalence correct answers maximum precipitation occurs when concentrations of antigen and antibody are equal (section B) Prozone correct answers Excess antibody is present -Antigen and antibody do NOT form precipitates, complexes remain soluble -False NEGATIVE results, dilute sample, retest or repeat in 1-2 weeks -Serial dilutio...