Question

Latex particles coated with group specific antibodies agglutinate in presence of bacterial antigens

a) Rapid strep test
b) ELISA
c) Western blot
d) PCR

Answer 1

The correct answer is a) Rapid strep test. Latex particle agglutination tests are commonly used in the Rapid Strep test to detect the presence of streptococcal bacteria. Agglutination refers to the clumping together of particles due to the binding of antibodies to specific antigens.

Step-by-step explanation:

The correct answer is a) Rapid strep test.

Latex particle agglutination tests are commonly used in the Rapid Strep test to detect the presence of streptococcal bacteria. In this test, latex particles coated with group-specific antibodies are mixed with a patient's throat swab. If streptococcal antigens are present in the patient's sample, they will bind to the antibodies on the latex particles, causing agglutination.

Agglutination refers to the clumping together of particles due to the binding of antibodies to specific antigens. It is an important technique used in various diagnostic tests to detect the presence of antibodies or antigens.

Answer 2

The correct answer is (a) Rapid strep test, which uses an indirect agglutination assay with latex beads coated with antibodies to detect the presence of Streptococcus in a patient's sample through agglutination.

Step-by-step explanation:

The test mentioned in the student's question, where latex particles coated with group specific antibodies agglutinate in the presence of bacterial antigens, corresponds to a type of indirect agglutination assay, also known as a latex fixation assay. Among the given options, the correct answer is (a) Rapid strep test, which is an example of an agglutination assay used to quickly and effectively diagnose the presence of Streptococcus bacteria that can cause conditions like strep throat.

This type of test utilizes latex beads coated with antibodies specific to an antigen found on the Streptococcus bacteria. When the patient's sample containing the bacterial antigen is mixed with these latex beads, the formation of visible clumps, or agglutination, occurs, indicating a positive result for that bacterial antigen. This method is advantageous for its speed and simplicity compared to more complex assays like ELISA, Western blot, or PCR.