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Updated Bacteriology ( Microbiology ) MCQs – Latest Medical MCQs

Updated Bacteriology ( Microbiology ) MCQs – Latest Medical MCQs

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Latest Medical MCQs

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Latest Bacteriology ( Microbiology ) Mcqs

The most occurred mcqs of Bacteriology ( Microbiology ) in past papers. Past papers of Bacteriology ( Microbiology ) Mcqs. Past papers of Bacteriology ( Microbiology ) Mcqs . Mcqs are the necessary part of any competitive / job related exams. The Mcqs having specific numbers in any written test. It is therefore everyone have to learn / remember the related Bacteriology ( Microbiology ) Mcqs. The Important series of Bacteriology ( Microbiology ) Mcqs are given below:

All are true about legionella pneumophilia except______________?

A. It can replicate in amoeba
B. Aquatic bodies are main habitat
C. Urine test is a reliable method
D. Person to person transmission

Each of the following viruses possesses an outer lipoprotein envelope except_____________?

A. Influenza Virus
B. Papilloma Virus
C. Varicella Zoster Virus
D. Human immunodeficiency virus

Actinomycosis is a_________________?

A. Aerobic fungal disease
B. Anaerobic bacterial disease
C. Aerobic bacterial disease
D. Anaerobic fungal disease

Which of the following is true about tetanus acquired through traumatic wound ?

A. Clostridium tetani travels via the nerves to the anterior horn dells in spinal cord
B. The patient should be given tetanus toxoid intravenously
C. The tetanospasmin component of the exotoxin act on the post-synaptic neurones and prevents impulse transmission
D. Causes positive Nagler reaction

Pseudomonas aeruginosa_________________?

A. Cannot be destroyed at 55 degree at 1 hr.
B. Causes Shangai fever
C. Produces heat stable enterotoxin
D. Does not produce any pigment

Which is not true about vibrio cholera_________________?

A. Grows on simple media
B. It is non-halophilic
C. Man is the only natural host
D. Cannot survive in extracellular environment

About Bacteroids True are all Except_______________?

A. Susceptible to many antibiotics
B. Most common species is B fragilis
C. Present mainly in mixed infections
D. Bile resistant anerobes

About N. gonorrhoea, all are true except__________________?

A. Found exclusively in human beings.
B. All stains are highly susceptible to penicillin
C. Wide spread axoregnic stains cause disseminated gonococcal infection
D. Most common cause of urethritis is male

Dental Plaque adheres to tooth surface by________________?

A. Dextran
B. Bacteria
C. Epithelial cells
D. Sucrose

Mycobacterium tuberculosis is best demonstrated by_________________?

A. H & E stain
B. Gram’s stain
C. Ziehl-Neelsen stain
D. PAS stain

The spirochete which is associated with fusospirochetosis is______________?

A. Treponjema pertenue
B. Treponema pallidum
C. Borrelia burgdorferi
D. Borrelia vincenti

Bacterial species which is protective or beneficial to the host is_______________?

A. Streptococcus sanguis
B. Treponema denticola
C. Porphyromonas gingivalis
D. Spirochetes

An elderly male patient presented with fever, chest pain, and dry cough, sputum culture showed growth on charcoal yeast Extract Medium, theorganism is______________?

A. Moraxella catarrhalis
B. H. influenza
C. Legionella
D. Burkholderia cepacia

Which one of the following enteric organisms is anaerogenic and non motile ?

A. Shigella sonnei
B. Proteus mirabilis
C. Salmonella typhi
D. Klebsiella pneumonia

The causative organism for cat-scratch disease is______________?

A. Donovania granulomatis
B. Chlamydia trachomatis
C. Bartonella henselae
D. Hemophilia ducreya

Erysipelas is caused by________________?

A. Group B staphylococci
B. Gonococci
C. Group A steptococci
D. Pneumococci

Which of the following is obligate aerobe ?

A. Pseudomonas aerogenosa
A. Proteus
B. coli
C. diphtheria

Staphylococcal toxic shock syndrome (SSS syndrome) is due to______________?

A. Enterotoxin A
B. Enterotoxin D
C. Enterotoxin B
D. Enterotoxin F

A 6 year old boy comes with abdominal pain, vomiting after consuming mild products within 6 hours. The most likely organism responsible is______________?

A. Staph. aureus
B. B.Cereus
C. Salmonella
D. Clostridium botulinum

The most primitive mode of gene transfer occurs by____________?

A. Translation
B. Transduction
C. Cell fusion
D. Conjugation

Antigen used in Weil-Felix reaction______________?

A. Haemophilus
B. E.coli
C. Proteus
D. Staphylococcus

A diabetic patient developed cellulitis due to staphylococcus aureus, which was found to be Methicillin resistant on the antibiotic sensitivity testing. All of the following antibiotics will be appropriate EXCEPT________________?

A. Teichoplanin
B. Imipenem
C. Vancomycin
D. Linezolid

Culture medium used for Bordatella pertussis is_________________?

A. Bile broth
B. Wilson Blair medium
C. Bordet Gengou medium
D. Robertson cooked meat medium

Pasteur developed the vaccine for_______________?

A. Rabies
B. Anthrax
C. Cholera
D. All of the above

Teichoic acid is present in cell walls of_________________?

A. Gram positive bacteria
B. Yeast
C. Gram negative bacteria
D. Protozoa

Pathogenic treponemas can be maintained in________________?

A. Chick embryos
B. Tissue culture
C. Artificial media
D. Rabbit testis only

Borelia vincenti is a______________?

A. Mycobacteria
B. Mycoplasma
C. Spirochaete
D. Chlamydia

All of the following lab tests can be used to distinguish streptococcus mutans from other oral streptococci, except______________?

A. Gram staining
B. Colony morphology on saliva agar
C. Production of intracellular and extracellular adherent polysacharide
D. Fermentation of mannitol and sorbital

A veterinary doctor had pyrexia of unknown origin His blood culture in special laboratory media was positive for gram negative short bacilli which was oxidase positive. Which one of the following is the likely organism grown in culture ?

A. Francisella spp
B. Pasturella spp
C. Bartonella spp
D. Brucella spp

Pneumococus can be differentiated from streptococcus by________________?

A. Gram staining
B. Type of hemolysis
C. Growth characteristics
D. Bile solubility

Streptococcus is classified based on__________________?

A. Cultural characteristics
B. M Protein
C. Bile Solubility
D. Cell wall carbohydrate

Leprosy bacilli can be grown in_________________?

A. Foot paid on nine branded armadilo
B. Testes of albino rats
C. Tail of guinea pig
D. Testes of guinea pig

Rapid diagnosis of Tuberculosis is possible with_______________?

A. Kin Young stain
B. Ziel Nelson
C. Auramine-Rhodamine stain
D. Giemsa stain

Commonest mycobacterial infection in tropical countries_______________?

A. M. avium intracellulare
B. M. leprae
C. M. tuberculosis
D. Kansasi

Opacity around colonies of Clostridium perfringens is due to_________________?

A. Desmolase
B. Lecithinase
C. Theta toxin
D. Cytokinin

Causative organism for gas gangrene_______________?

A. Coli
B. Clostridium welchii
A. Clostridium tetani
C. Strep. Faecalis


A. Transmitted by arthropod vectors
B. Multiply within living cell
C. Respond to tetracycline therapy
D. All of the above

False +ve for VDRL is seen in______________?

A. Lepromatous Leprosy
B. Yaws
C. Malaria
D. All of the above

The diagnostic investigation for syphilis is__________________?

A. TPI test
B. VDRL test
C. FTAB test
D. TPHA test
E. Both C & D

Which organism causes prosthetic valve endocarditis within 60 days of surgery________________?

A. Staphylococcus aureus
B. Staphylococcus epidermis
C. Streptococcus Viridans
D. Fungus

What is the transport medium for cholera___________________?

A. Tellurite Medium
B. Venkatraman – Ramakrishnan Medium
C. Cary Blair Medium
D. B & C

Which of the following are non-spore forming anaerobic bacteria that asume major significance in disease processes________________?

A. Fusobacterium nucleatum
B. Bacteroides fragilis
C. Peptostreptococcus anaerobius
D. Actinomyces Israeli
E. All of the above

The diagnosis of gonorrhea is established by_____________?

A. Pili agglutination tests
B. Compliment fixation tests
C. Haemagglutination tests
D. All of the above tests

Subacute bacterial endocarditis is caused by_____________?

A. Streptococcus viridans
B. Staphylococcus aureus
C. Haemolytic streptococci
D. Nisseria

Growth factor needed for Salmonella_________________?

A. Tryptophan
B. B-12
C. Niacin
D. Citrate

Organism most frequently associated with urinary tract infections is_________________?

A. T-strain mycoplasma
B. Escherichia coli
C. Neisseria gonorrhea
D. Streptococcus fecalis

Neurotoxin of tetanus acts on______________?

A. Muscle
B. Synapse
C. Brain
D. Spinal card

Encapsulation in bacteria helps in__________________?

A. Decreased virulence
B. Spore formation
C. Prevent their phagocytosis
D. Oxygen effect

Which of the following structures, found external to the bacterial cell wall, are involved in bacterial attachment to cell surfaces?

A. Flagella
B. Capsule
C. Pili
D. Mesosomes

Loss of capsule in bacteria is generally associated with______________?

A. Decease in virulence
B. Inability to spread through tissue
C. Loss of infectivity
D. increase in invasiveness

Nagglers reaction is used in the diagnosis of______________?

A. Whooping cough
B. Malaria
C. Gas gangrene
D. Wool sorters disease

The commonly used fluorescent dye in the detection of tubercie bacilli________________?

A. Thioglavin
B. Acridine orange
C. Congo red
D. Auramine and Rhodamine

Actinomycosis is caused by______________?

A. Acid fast, non-motile bacillus
B. Fungus
C. Anaerobic, gram positive, non-acid fast bacteria.
D. Retrovirus

The facultative anaerobic bacteria are those who are_______________?

A. Unable to grow in the absence of oxygen
B. Unable to grow in the presence of oxygen
C. Able to grow in the presence of carbon dioxide
D. Able to grow in the presence of absence of oxygen

One of the following is a zoonotic disease_____________?

A. Anthrax
B. Bacillary dysentery
C. Typhoid
D. Cholera

Common inhabitant of throat and tonsils is______________?

A. Alpha hymolytic streptococci (S. viridans)
B. Beta hemolytic streptococci
C. Staphylococci
D. Pneumococci

Resistance of Staphylococcus aureus is due to ________________________?

A. Penicillin analogue production
B. Elaboration of an enzyme that destroy penicillin
C. Pleomorphism
D. Lack of nucleic acid in the cell wall

Malignant pustule is referred to_________________?

A. Infected squamous cell carcinoma
B. Cutaneous anthrax
C. Facio-cervical actinomycosis
D. None of the above

The major intestinal pathogens which are non-lactose fermenters are_________________?

A. Salmonella
B. Escherichia
C. Klebsiella
D. Paracolons

Inactivated microorganisms are used in the manufacture of which of the following________________?

A. Salk vaccine
B. Sabin’s oral vaccine
C. Tetanus toxoid
D. All of the above

which of the following is anaerobic_______________?

A. Pseudomonas
B. Bacteroides
C. E.coli
D. Klebsiella

Grape bunch shaped colonies are seen in______________?

A. E.coli
B. Staphylococcus
C. Streptococcus
D. Gonococci

Which of the following enzyme is required to induce the formation of a plasma clot pathogenic staphylococci_____________?

A. Fibrinolysin
B. Lysozyme
C. Coagulase
D. S protein

Bacteria acquire characteristics by all of the following except___________________?

A. Through bacteriophages
B. Incorporating part of host DNA
C. Though plasmids
D. through conjugation

Bacteria with potent exotoxin is_______________?

A. Clostridium tetani
B. Shigella
C. Pseudomonas
D. Klebsiella

Wasserman test test is diagnostic of__________________?

A. Syphilis
C. Gonorrhea
D. Tyhoid

Phage conversion is required for________________?

A. Gonorrhoea
B. Diptheria
C. Tularemia
D. All o f the above

Anaerobic bacteria grow_______________?

A. in the presence of nitrogen
B. in the presence of oxygen
C. in the absence of oxygen
D. differential media

The bacterial cell wall has all of the following properties except______________?

A. It is the structure principally responsible for the reaction of gram staining
B. It consists of a mixed polymer called peptidoglycon
C. It is a unique flexible plastic structure
D. It contains D-isomers of amino acids

Each of the following can cause food poisoning except________________?

A. Cl. difficile
B. Cl. welchii
C. Staphylococcus
D. Cl. botulinum

The following are applicable to bacterial genoms except________________?

A. It doe not contain histones
B. It is composed of DNA
C. It is circular
D. Its DNA has both introns and extrons

Electron microscopic examination of the bacterial flora of necrotising ulcerative gingivitis indicates the presence of microorganisms within non-necrotic tissues in advance of other bacteria. The organisms involved are______________?

A. Bacteriophages
B. Spirochetes
C. Cocci
D. Filamentous rods

The structure in involved in bacterial attachment to cell surface is_______________?

A. Flagella
B. Fimbria
C. Capsule
D. None of the above

Signs of tyhoid fever is/are_____________________?

A. perforation
B. Haemorrhage
C. Osteomyelitis
D. All of the above

In initial stages of tyhoid, salmonella can be detected in________________?

A. Urine
B. Feacus
C. Blood
D. All of the above

On a stained slide, clostridium tetani has the appearance of a__________________?

A. Chain of beads
B. Bunch of a
C. Drum stick
D. Safely pin

The urine sample of a patient has been sent to the laboratory to look for Leptospira. The specimen is to be screened by use of the__________________?

A. Inverted microscope
B. Scanning microscope
C. Dark ground microscope
D. Electron microscope

Which of the following fulfil all the criterias of kich’s postulates ?

A. Mycobacterium leprae
B. Treponema pallidum
C. N. gonorrhoeae
D. None of the above

Among The infectious diseases transmitted by food, one is___________________?

A. Diptheria
B. Viral stomatitis
C. Tuberculosis
D. Typhoid fever

Black pigmented anaerobes include all of the following except______________?

A. Porphyromonas
B. Tannerella
C. Buccae
D. Prevotella

Updated Bacteriology ( Microbiology ) MCQs – Latest Medical MCQs