🦠 Microbiology Solved MCQs with Answers

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

1927 solved MCQs

Plastic implants can pose a serious nosocomial infection problem becauseAnswer: all of the above Which of the following bacteria is susceptible to thiophen-2-carboxylic acid hydrazide?Answer: M bovis Culture of tubercle bacilli may be positive if number of bacteria in the specimen isAnswer: as few as 10-100 per ml Example of a Saprophytic bacteria isAnswer: Msmegmatis Eugonic growth on Lowenstein-Jensen medium is produced byAnswer: Mycobacterium tuberculosis The causative agent of Buruli ulcer isAnswer: M ulcerarts False negative Mantoux test is observed inAnswer: All of these Humans become infected with Mycobacterium tuberculosis most frequently byAnswer: inhalation Rough and buff colonies on LJ medium are characteristic ofAnswer: Mycobacterium tuberculosis Which of the following species of Mycobacterium is positive for nitrate reduction test?Answer: All of these The bacteria which is microaerophilic on primary isolation, isAnswer: M bovis Which of the following bacteria is sensitive to pyrazinamide?Answer: Mycobacterium tuberculosis The bacteria which cause(s) tuberculosis in man is/areAnswer: All of these Which of the phage types of Mycobacterium tuberculosis occurs most frequently in India?Answer: Type I Members of the genus Mycobacterium areAnswer: all of these A positive Mantoux test indicates an area of induration ofAnswer: 10 mm or more in diameter Lactobacilli grow best underAnswer: microaerophilic conditions in presence of 5% CO₂ and PH6 Which of the following genera is included in the family Bacteroi-daceae?Answer: All of these The bacteria which is predominant flora of the human gut isAnswer: Clostridium perfringens The current genus name of a saccharolytic group of Bacteroides isAnswer: Porphyromonas Colonies resembling molar teeth are produced byAnswer: Actinomyces israelii Which of the following bacterial colonies fluoresce brick-red in UV light?Answer: B melaninogenicus Which of the following bacteria is acid-fast?Answer: Nocardia Lactobacilli constitute the normal flora ofAnswer: adult vagina Which of the following bacteria is gram-negative cocci?Answer: Veillonella The commonest species of Bacteroides in fragilis group, which causes human infection, isAnswer: B fragilis The commonest bacterial cause of cervicofacial actinomycosis isAnswer: A. israelii Which of the following bacteria is moderately saccharolytic?Answer: B melaninogenicus Which of the following serotypes of Salmonella does not produce H₂S?Answer: Both (a) and (b) Which of the following is the commonest species of Salmonella for causing zoonotic disease?Answer: S typhimurium