🦠 Microbiology Solved MCQs with Answers

Practice 1927 approved 🦠 Microbiology questions with verified answers from the 🧬 Medical Science subject for Pakistan exams.

1927 solved MCQs

Cell wall protein of Streptococcus pyogenes crossreacts with humanAnswer: myocardium Individuals suffering from primary atypical pneumonia have agglutinins toAnswer: Streptococcus MG Which of the following test(s) may establish retrospective diagnosis of streptococcal infection?Answer: All of these The bacterial sore throat is caused byAnswer: Streptococcus pyogenes Crystal violet blood agar is a selective medium forAnswer: β-haemolytic streptococci McFadyean's reaction is employed for the presumptive diagnosis ofAnswer: anthrax The bacteria, used to examine the efficacy of autoclave, isAnswer: Bacillus stearothermophilus Antibodies to which of the following antigens of Bacillus anthracis are protective?Answer: Anthrax toxin The test(s) which can be used to differentiate anthrax bacilli from anthracoid bacilli is/areAnswer: all of these The test(s) which can be used to differentiate anthrax bacilli from anthracoid bacilli is/areAnswer: all of these Medusa head appearance of the colonies may be due toAnswer: Bacillus anthracis Food most often associated with emetic type of food poisoning caused by Bacillus cereus, isAnswer: Rice Koch's postulates were satisfied for the first time withAnswer: Bacillus anthracis Ascoli's thermoprecipition test helps in confirming the laboratory diagnosis ofAnswer: anthrax Which of the following types of Clostridium perfringens produces alpha toxin most abundantly?Answer: Type A Which of the following is predominantly proteolytic?Answer: Both (a) and (b) Which of the following properties are the characteristics of tetanospasmin?Answer: All of these Types of exotoxin, most commonly associated with botulism in man, is/are?Answer: All of these Nagler's reaction is useful for the identification ofAnswer: C perfringens The most toxic exotoxin isAnswer: botulinum toxin Which of the following species of Clostridium is predominantly sacchrolytic?Answer: All of these Stormy clot reaction is useful in identification ofAnswer: C perfringens Food poisoning strains of Clostridium perfringens belong toAnswer: type A Reddening of meat in cooked meat broth is produced byAnswer: Clostridium perfringens Clostridium botulinum food poisoning is due toAnswer: preformed toxin Drumstick appearance is characteristic ofAnswer: all of these Blackening of meat in cooked meat broth is throughAnswer: C histolyticum Typical drumstick appearance of bacilli is generally seen inAnswer: C tetani Which of the following(s) is/are obligate anaeorbes?Answer: All of these Which of the following characteristic of the Rotavirus was important for the construction of the Rotashield vaccine?Answer: The possession of a segmented RNA genome