Mcq 204j31

Q1. An AIDS patient, who is being treated with multiple drugs, develops breast hypertrophy, central adiposity, hyperlipidemia, insulin resistance and nephrolithiasis. If these changes are related to his drug treatment, this drug belongs to which group of anti-retroviral drugs? a) b) c) d) e)

Nucleoside Reverse Transcriptase Inhibitors (NRTIS) Non-nucleoside Reverse Transcriptase Inhibitors (NNRTIS) Fusion Inhibitors Protease Inhibitors Integrase Inhibitors

Q2. A 35 year old HIV positive male patient comes to the OPD with complaint of anorexia, nausea and vomiting and abdominal pain. His abdomen is tender in the epigastric area. Laboratory results reveal a raised serum amylase activity and a preliminary diagnosis is made of acute pancreatitis. Which of the following anti-retroviral drugs has the patient most likely been taking? a) b) c) d) e)

Saquinavir Zidovudine Didanosine Efavirenz Enfuvirtide

Q3. Antibiotics inhibiting the bacterial cell wall synthesis are: a) b) c) d) e)

Beta-lactam antibiotics Tetracyclines Aminoglycosides Macrolides Chloramphenicol

Q4. Which of the following anti-malarial is used as radical curative agent for Plasmodium vivax /ovale Malarial infections? a) b) c) d) e)

Quinine Primaquine Proguanil Amodiaquine Artemether

Q5. Which one of the following cephalosporins can be used to treat H. influenzae meningitis? a) b) c) d) e)

Ceftriaxone Cefoxitin Cefaclor Cefamandole Cephalexin

Q6. Which one of the following penicillins is resistant to Staphylococcus aureus βeta lactamases? a) b) c) d) e)

Amoxicillin Piperacillin Methicillin Benzathine penicillin Ticarcillin disodium

Q7. Urine culture of a patient has shown growth of Pseudomonas aeruginosa. Which one of the following cephalosporins should be used in treatment of this case? a) b) c) d) e)

Ceftazidime Ceftizoxime Ceftriaxone Cefuroxime Cefotetan

Q8. Bacteroides fragilis infection is preferably treated with: a) b) c) d) e)

Tetracyclines Metronidazole Tobramycin Carbenicillin Azithromycin

Q9. Loading dose of chloroquine is required because it is:a) b) c) d) e)

Rapidly excreted by the kidneys Rapidly metabolized by biotransformation High lipid solubility More entry into infected RBCs High tissue binding

Q10. Artemisinin a derivative of Chinese herbal medicine: all are true Except: a) b) c) d) e)

Metabolized to dihydroartimesinin, an active metabolite Rapidly acting blood schizonticide against all human plasmodia Acts through a free radical by inhibiting Calcium ATPase pump Least toxic among all antimalarial drugs An alternative to primaquine as gametocidal

Q11. WHO has approved the following regimens for multidrug resistant P. falciparum? a) b) c) d) e)

Artemether plus lumefantrine Artemether plus amodiaquine Artemether plus mefloquine Artemether plus sulfadoxine plus pyrimethamine Artemether plus halofantrine

Q12. The travelers visiting to areas endemic for chloroquine resistant malaria are recommended to have prophylactic treatment. A cost effective, safe and showing excellent result is: a) b) c) d) e)

Mefloquine Quinine Artesunate Pyrimethamine Halofantrine

Q13. Select the ONE BEST statement, which is NOT true for mechanisms of bacterial resistance to penicillin: a) b) c) d) e)

bacteria produce large amounts of beta-lactamase beta-lactamase inactivates all types of penicillin bacterial beta-lactamase is encoded by a plasmid penicillinase is synonymous with beta-lactamase beta-lactamases of gram-negative bacteria are encoded either in chromosomes or plasmids

Q14. Whichof the following penicillins has the best gram-negative spectrum? a) b) c) d) e)

nafcillin ampicillin methicillin penicillin V phenethicillin

Q15. Streptomycinis an antibiotic which inhibits the process of a) b) c) d) e)

translationin eukaryotes. translation in prokaryotes. transcriptionin eukaryotes. transcriptionin prokaryotes. DNAreplication in prokaryotes.

Q16. An injection of penicillin into a penicillin-sensitizedperson may lead to death due to a) b) c) d)

absence of histamine. a Shwartzman's reaction. release of enzymes from polymorphonucleai leu kocytes. constriction of bronchioli and drop in blood pressure.

Q17. Whichof the following genera most frequently develops resistance to penicillin? a) Neisseria b) Treponema c) Actinomyces

d) Streptococcus e) Staphylococcus

Q18. In organisms sensitive to penicillin, this antibiotic showsthe greatest bactericidal activity against a) b) c) d) e)

growing gram-negativebacteria. growing gram-positivebacteria. nongrowinggram-negative bacteria. nongrowinggram-positive bacteria. sporulatinggram-negative bacteria.

Q19. A 21 year old man was seen in a clinic with a complaint of dysuria and urethral discharge of yellow pus. He has a painless clean-base ulcer on the penis and nontender enlargement of the regional lymph nodes. Gram stain of the urethral exudates showed gram negative diplococci within polymorphonucleocytes. The patient informed the clinic staff that he was unemployed and had not eaten a meal for two days. The most appropriate treatment of gonorrhea in this patient is: a) b) c) d) e)

amoxicillin orally for 7 days vancomycin intramuscularly as a single dose ceftriaxone intramuscularly as a single dose tetracycline orally for 7 days procaine penicillin G intramuscularly as a single dose plus one gram of probenecid

Q20. An elderly debilitated patient has a fever believed to be due to an infection. He has extensive skin lesions, scrapings of which reveal the presence of large numbers of gram-positive cocci. The most appropriate drug to use for treatment of this patient is: a) b) c) d) e)

amoxicillin salbactam cefoxitin nafcillin penicillin G

Q21. Which of the following statement is true? a) b) c) d) e)

nafcillin is beta-lactamase resistant antibiotic cefazolin is second generation cephalosporin tazobactam is used in gonorrhea mainly penicillin G is contraindicated in infections caused by spirochetes thrombocytosis is main side effect of Linezolid

Q22. A 35 year old woman is diagnosed with chronic hepatitis B infection and therapy is initiated. Just after a few hours she comes to the emergency department complaining of fever, chills and muscle aches. Which one of the following drugs most likely caused these symptoms? a) Lamivudine

b) c) d) e)

Adefovir Entecavir Interferon alfa Ribavirin

Q23. Most important toxic effect associated with alkylating agents: a) b) c) d) e)

renal dysfunction hepatic failure neurotoxicity bone marrow suppression alopecia

Q24. Primary mechanism of action: inhibition of topoisomerase II a) b) c) d) e)

vincristine (Oncovin) teniposide (Vumon) vinblastine (Velban) A&C A, B & C

Q25. A chemotherapeutic agent that causes the persistent aggregation of microtubules is? a) b) c) d) e)

Cisplatin Paclitaxel (Taxol) Vincristine Bleomycin Doxorucibin