Q1041. Which organismal infection is highly virulent and may cause corneal ulcer perforation within 48 hours?

Q1072. One of the following drugs is used in acute bacterial meningitis

Q1352. vomiting, or vaginal discharge. Her vitals are stable, and there is no history of recent antibiotic use or urinary tract abnormalities. Empirical therapy is being considered. Which of the following drugs should NOT be preferred as first-line empirical treatment in this case?

Q1355. confused, febrile (39.5°C), with a positive Kernig’s sign and neck rigidity. On CSF analysis show low glucose. Fundoscopy shows no papilledema. The physician decides to start empirical antibiotics immediately. Which of the following is the most appropriate empirical therapy?

Q1361. A 48-hour culture on the PPLO agar shows small colonies showing fried egg colonies. Which organism is most likely?

Q1362. A patient from an endemic area presents with chronic respiratory symptoms. Microscopy shows small oval yeast forms with narrow-based budding, seen inside macrophages. Which of the following organisms is most likely responsible?

Q1366. A 4-year-old child presents with fever, cough, and signs of lower respiratory tract infection. Sputum culture shows no growth on blood agar but grows on chocolate agar. The organism is a fastidious gram-negative bacillus requiring Factor X and Factor V for growth. The most likely causative organism is:

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 -