Q1369. A 30-year-old foreign traveler presents with acute onset profuse watery diarrhea for 12 hours. The stools are colorless and rice-water–like, with no blood or pus. He has signs of severe dehydration. Which toxin is responsible for this illness?

Q1370. Patient with history of consuming home-canned vegetables at a family gathering presents with acute flaccid paralysis. The clinical picture is attributed to botulinum toxin produced by Clostridium botulinum. What is the most likely mode of transmission in this case?

Q1420. A healthcare facility has a stock of expired antibiotics. What is the correct method for their disposal according to biomedical waste and environmental guidelines?

Q1565. A patient presents with a painful genital ulcer of acute onset. On examination, the ulcer has ragged, undermined edges with a purulent base. He also has tender, unilateral inguinal lymphadenopathy. What is the most likely causative organism

Q1639. breathing. A throat swab is sent for culture. On chocolate agar, the organism shows growth with no hemolysis. Gram stain reveals small gram-negative coccobacilli. Which of the following organisms is most likely being isolated on chocolate agar?

Q1647. A diabetic patient presents with whitish plaques in the oral cavity that can be scraped off, revealing erythematous mucosa underneath. A KOH mount of the scrapings shows budding yeasts with pseudohyphae.Which of the following culture media is most appropriate for isolation of the causative organism?

Q1648. A 30-year-old man develops profuse vomiting and diarrhea within 3 hours of consuming pre-packaged salad and milk at a picnic. The symptoms started rapidly and are primarily gastrointestinal. Which of the following is the most likely causative organism?

Q1649. MICRO An HIV-positive patient presents with chronic diarrhea. Stool microscopy reveals oocysts measuring 8–11 microns containing two sporocysts. Which of the following is the most likely causative organism?

Q2747. Drug inhibiting bacterial protein synthesis are all except-

Q2840. The correct order of gram staining is

Q2841. Flagella not true -

Q2842. In nutrient agar concentration of agar is -

Q2845. In donovanosis-

Q2846. Necrotizing fascitis is caused by -

Q2852. Which group of streptococcus grow at > 60°C

Q2854. Seven sheathed flagella is seen in -

Q2856. Meningococci differ from gonococci in that they?

Q2857. Cholera toxin is due to -

Q2859. Virulence of gonococci is due to -