BIOCHEMISTRY, BIOMEDICINE & PHARMACEUTICS

Multiple Choice Questions in Upper and lower respiratory tract  microorganisms and  infections -  common cold, pneumonia, tuberculosis and other respiratory tract infections                           Figure: Respiratory tract (Source- Bailey and Scott's Diagnostic Microbiology) 1) During the flu season, a 69-year-old woman with a 25-year history of hypertension and 3 years of arthritis presented at the hospital. She had been experiencing symptoms resembling a common cold, including a mild cough, chest discomfort, fever, and body aches, all persisting for the past 4 days. A sputum sample is collected for laboratory analysis, and a chest X-ray revealed suspicions of lobar pneumonia.  Laboratory culture of the specimen yielded colonies of round diplococci organized in chains, indicating a potential infection. Which of the following bacteria could be the possible pathogen ? a) Neisseria gonorrhoeae b...

                      Multiple Choice Question on Tuberculosis and Leprosy 1) Mycobacteria are acid-fast positive bacteria because they consist of : a) lipopolysaccharide in the bacterial cell wall b) mycolic acid in the bacterial cell wall c) lipids d) Both B and C options above 2) Which of the following first-line antibiotics are usually resistant to Mycobacterium tuberculosis ? a) Isoniazid and ciprofloxacin b) Isoniazid and Rifampin c) Rifampin and ciprofloxacin d) Rifampin and streptomycin 3) What is the mechanism responsible for antibiotic resistance seen in M. tuberculosis ? a) Mutations in DNA gyrase gene b) Alterations in beta-lactamase c) Mutations in the catalase-peroxidase gene d) Alterations in RNA polymerase 4) All of the following are examples of selective media / agar used for the culture of M. tuberculosis , Except ? a) Inspissated egg media b) Middlebrook 7H10 / 7H11 media with antibiotic...