2016 micro Flashcards by geeky medical

Which cell structure differentiates between klebsiella pneumonae and staphylococcus aures?

a. Cell membrane
b. Peptidoglycan
c. Periplasmic space
d. Ribosomes

c. Periplasmic space

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What of the following is used to identify S. Aures?

a. Catalase
b. Coagulase
c. Biofilm

b. Coagulase

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What is the mode of transmission of brucellosis?

a. Needle inoculation
b. Inhalation of aerosols
c. Mosquito bite
d. Drinking contaminated water

b. Inhalation of aerosols

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Which animal is the reservoir of brucella melitensis?

a. Cows
b. Sheep
c. Dogs
d. Pigs

b. Sheep

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What describes endemic diseases?

a. It appears suddenly for a short period
b. It affects a community continuously
c. It affects people in hospitals
d. It affects young people

b. It affects a community continuously

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Which of the following permanently reside in the nose?

a. Staphylococci
b. Enterococcus
c. Mycoplasma

a. Staphylococci

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Which category of E.coli causes dysenteric illness?

a. Enteroinvasive e.coli
b. Enterotoxigenic e.coli
c. Enterohaemorrhagic e.coli
d. Enteroaggregative e.coli

a. Enteroinvasive e.coli

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What is the causative agent of nasal mucosa atrophy?

a. Proteus mirabilis
b. Klebsiella pneumonia
c. Klebsiella ozanoe
d. Klebsiella oxytoca

c. Klebsiella ozanoe

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Which virulence factor associated with legionella pneumophila is active in both macrophages and amoebas?

a. Cytotoxin
b. Metalloprotease
c. Dot/icm
d. Pmi locus

c. Dot/icm

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What is a characteristic of legionella?

a. Excreted in urine
b. Can be transmitted from person to person
c. Can be killed by chlorine

a. Excreted in urine

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What is the function of the clumping factor produced by S.aures?

Clot formtion

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What structure helps in the adhesion of s.aures to the valve of the heart?

a. Biofilm
b. Catalase
c. Coagulase
d. Hyalorondyase

a. Biofilm

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What makes N.gonnorehea an anti-phagocytic microbe?

a. Catalase
b. Coagulase
c. Fibrea

a. Catalase

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What is the habitat of N. meningitidis ?

a. Anterior nares
b. Nasopharynx
c. Skin
d. Oropharynx

b. Nasopharynx

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Which factor leads to the resistance of mycobacterium tuberculosis to gram stain?

a. Mycolic acid
b. Peptidoglycan
c. Lipoteichoic acid
d. Polysaccharide capsule

a. Mycolic acid

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What is most likely the etiologic agent of hospital acquired bloody diarrhea after therapy with ciproflaxin in a 65 year old man?

a. Clostridium perfringens
b. Clostridium difficile
c. Clostridium tetani

b. Clostridium difficile

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Which of the following produces double zone hemolysis on blood agar?

a. Clostridium perfringens
b. Clostridium difficile
c. Clostridium tetani

a. Clostridium perfringens

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Which of the following anaerobes is the most common cause of post-surgical abdominal abscesses/infections?

a. Clostridium botulinum
b. B. fragilis
c. P. gingivials

b. B. fragilis

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Which of these in pseudomonas causes systemic infection?

a. Pilli
b. Fimbriae
c. Flagella
d. Exo and endotoxins

d. Exo and endotoxins

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Which antibiotic is used to treat pseudomonas aurginosa?

a. Cefotazime
b. Ceftazidime
c. Ampicillin
d. Tetracycline

b. Ceftazidime

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What causes HUS?

a. Enterotoxigenic E. coli
b. Campylocobacter jejuni
c. Enteroaggregative E. coli

b. Campylocobacter jejuni

What is a characteristic of v. parahemolyticus?

a. Non-halophilic
b. Causes food poisoning after ingestion of seafood
c. Produces yellow colonies on TCBS
d. Causes UTI

b. Causes food poisoning after ingestion of seafood

What is true about v.cholera

a. Non-halophilic
b. Haplophilic
c. Produces green colonies

a. Non-halophilic

What is the causative agent of peptic ulcer?

a. Enterotoxigenic E. coli
b. Helicobacter pylori
c. Campylocobacter jejuni

b. Helicobacter pylori

What is a characteristic of streprococcus pneumonia? a. Gram + diplococci optochin sensitive b. Gram + cocci bacitracin sensitive c. Gram + cocci in clusters catalase + d. Gram + in chains and bile soluble

a. Gram + diplococci optochin sensitive

What is the cause of community acquired pneumonia? a. Enterococcus b. Streptococcus pneumonia c. Chlamydia trachomatis

b. Streptococcus pneumonia

What characterizes chlamidya? a. Grow in enriched artificial media b. Obligate intracellular c. No cell wall d. Resistant to tetracycline

b. Obligate intracellular

A five years old boy developed trachoma, what is the outcome? a. Blindness b. Endophthalmitis c. Retinal bleeding d. Conjunctivitis

a. Blindness

A two years old neonate presented with pneumonitis, what is the etiologic agent? a. Haemophilius influenza b. Mycoplasma pneumonia c. Chylamydia trachomatis d. Streptococcus pneumonia

c. Chylamydia trachomatis

Which one is stained with gram stain? a. T. pallodum b. Haemphilus c. Mycoplasma

b. Haemphilus

What does H. ducreyi cause? a. HUS b. Chancroid c. Lymphgranuloma venereum (LGV)

b. Chancroid

Which culture media contains factor X and V required by haemophilus bacteria to grow? a. Chocolate agar b. Blood agar

a. Chocolate agar

Which etiological agent is associated with female genital and newborn infections? a. Chalmydia psittaci b. Klebsiella aerogenes c. Mycoplasma hominis d. Haemophilus ducreyi

c. Mycoplasma hominis

A 31 year old south Asian farmer presented with fever, chills, fatigue, and constipation. He noticed light pink spots on his legs a couple of days after the fever started, what is the etiological agent? a. E.coli b. Entamoeba histolytica c. Salmonella typhi d. Yersinia pestis

c. Salmonella typhi

What organism causes (bowl’s eye) colonies on CIN agar? a. E.coli b. Salmonella typhi c. Yersinia enterocolitica d. Yersinia pestis

c. Yersinia enterocolitica

What is a major component of fungal cell wall? a. Cholesterol b. Glucan c. Mycolic acid d. Teichoic acid

b. Glucan

What tissue is infected by filarial infection? a. Blood vessels b. Lymphatics c. Spleen

b. Lymphatics

Which of the following pathogens can be prevented by vaccination? a. Malaria b. Cutaneous leshmaniasis c. Dyntestry d. Hepatits

b. Cutaneous leishmaniasis

A 23-year-old male was presented with pain in the right upper abdomen. An ultrasound showed a cystic lesion in the right lobe of the liver suggestive of a parasitic infection. What method should the doctor use to confirm the diagnosis? a. Biopsy of cyst b. Serology of specific antibodies

b. Serology of specific antibodies

Which diagnostic method is most sensitive to detect invasive ameboic infection? a. Blood culture b. Stool culture c. Blood smear d. Serology

d. Serology

What is a characteristic of foot, hand, mouth disease? a. Caused mostly by coxsackie B virus b. Mainly affects infants and children c. The disease is usually severe d. The usual incubation period is 3-6 weeks

b. Mainly affects infants and children

Which of the following is characteristic of HIV? a. Destroy CD4+ cells b. Destroy CD8+ cells

a. Destroy CD4+ cells

What type can you find in stool? a. Hepatitis A b. Hepatitis B c. Hepatitis C d. Hepatitis D

a. Hepatitis A

What is the causative agent of smallpox? a. Cowpox virus b. Chickenpox virus c. Variola virus

c. Variola virus

MMR vaccine is a. Conjugate b. Live-attenuated c. Toxoid d. Killed

b. Live-attenuated

Which virus causes pneumonia? a. BK virus b. HHV-7 c. Rota virus d. Varicella virus

d. Varicella virus

What is the most common colonizer of mucosal surfaces? a. Asperigillus b. Candida albicans c. M.canis d. Cryptococcus

b. Candida albicans

What enzyme is a virulence factor in dermatophyte infections? a. Chitinase b. Keratinase c. Laccase d. Lipase

b. Keratinase

Which of the following is from mucorles?

a. Rhizopus

Which pathogen is acquired by contact with animals?

a. M.canis