This type of hypersensitivity reaction involves failure of the development of self-tolerance:
delayed hypersensitivity reaction
antibody-mediated reaction
autoimmune reaction
immediate hypersensitivity reaction
The Correct Answer is C
A. Delayed hypersensitivity reaction: This type of hypersensitivity reaction, also known as Type IV hypersensitivity, involves a delayed response by the immune system and is mediated by T cells. It does not necessarily involve a failure of self-tolerance.
B. Antibody-mediated reaction: This type of hypersensitivity reaction, also known as Type II hypersensitivity, involves antibodies targeting specific antigens on cell surfaces, leading to cell destruction. It doesn't directly indicate a failure of self-tolerance but rather an immune response against specific cells or tissues.
C. Autoimmune reaction: In autoimmune reactions, the immune system fails to recognize certain body tissues or substances as "self," leading to an immune response against the body's own cells or tissues. This results from a breakdown in self-tolerance, where the immune system mistakenly targets its own body.
D. Immediate hypersensitivity reaction: This type of hypersensitivity reaction, also known as Type I hypersensitivity, involves an immediate response by the immune system to an allergen. It includes conditions like allergies and anaphylaxis, where the immune system reacts strongly to substances that are normally harmless. This response does not necessarily indicate a failure of self-tolerance but rather an exaggerated response to specific antigens.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. Aminoglycosides: Aminoglycosides are a different class of antibiotics. They do not have cross-sensitivity with penicillin. People who are allergic to penicillin can usually take aminoglycosides without a problem.
B. Erythromycins: Erythromycins are macrolide antibiotics. They are not related to penicillin structurally, so there is no cross-sensitivity between penicillin and erythromycins. People allergic to penicillin can generally take erythromycin without issues.
C. Quinolones: Quinolones, also known as fluoroquinolones, are a different class of antibiotics. They do not share a structural similarity with penicillin, so there is usually no cross-sensitivity between penicillin and quinolones. People allergic to penicillin can usually take quinolones without problems.
D. Cephalosporins: Cephalosporins are beta-lactam antibiotics, just like penicillins. They have a similar chemical structure to penicillins, which can lead to cross-sensitivity. Individuals who are allergic to penicillin might also have an allergic reaction to cephalosporins due to this structural resemblance. However, it's important to note that not all cephalosporins are the same, and the risk of cross-reactivity varies among different generations of cephalosporins. Healthcare providers need to assess the specific situation and choose an appropriate antibiotic if there is a known penicillin allergy.
Correct Answer is C
Explanation
A. Gentamicin: Gentamicin is an aminoglycoside antibiotic effective against many bacteria, but it's not the first choice for MRSA. Vancomycin or other alternatives are preferred due to the rising resistance of MRSA to gentamicin.
B. Nafcillin: Nafcillin is a penicillin antibiotic, often used for penicillin-sensitive staphylococcal infections. However, it is not effective against MRSA, which is resistant to many penicillin-based antibiotics.
C. Vancomycin: Vancomycin is a glycopeptide antibiotic used to treat a variety of bacterial infections, including MRSA. It works by inhibiting cell wall synthesis in bacteria, making it effective against Gram-positive bacteria that have developed resistance to other antibiotics like methicillin (which MRSA has).
D. Penicillin: Penicillin is a group of antibiotics that includes drugs like amoxicillin and ampicillin. MRSA is resistant to penicillin-based antibiotics, so they are not effective against MRSA infections.
Whether you are a student looking to ace your exams or a practicing nurse seeking to enhance your expertise , our nursing education contents will empower you with the confidence and competence to make a difference in the lives of patients and become a respected leader in the healthcare field.
Visit Naxlex, invest in your future and unlock endless possibilities with our unparalleled nursing education contents today