2016 micro Flashcards
Which cell structure differentiates between klebsiella pneumonae and staphylococcus aures?
a. Cell membrane
b. Peptidoglycan
c. Periplasmic space
d. Ribosomes
c. Periplasmic space
What of the following is used to identify S. Aures?
a. Catalase
b. Coagulase
c. Biofilm
b. Coagulase
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
Which animal is the reservoir of brucella melitensis?
a. Cows
b. Sheep
c. Dogs
d. Pigs
b. Sheep
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
Which of the following permanently reside in the nose?
a. Staphylococci
b. Enterococcus
c. Mycoplasma
a. Staphylococci
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
What is the causative agent of nasal mucosa atrophy?
a. Proteus mirabilis
b. Klebsiella pneumonia
c. Klebsiella ozanoe
d. Klebsiella oxytoca
c. Klebsiella ozanoe
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
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
What is the function of the clumping factor produced by S.aures?
Clot formtion
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
What makes N.gonnorehea an anti-phagocytic microbe?
a. Catalase
b. Coagulase
c. Fibrea
a. Catalase
What is the habitat of N. meningitidis ?
a. Anterior nares
b. Nasopharynx
c. Skin
d. Oropharynx
b. Nasopharynx
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
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
Which of the following produces double zone hemolysis on blood agar?
a. Clostridium perfringens
b. Clostridium difficile
c. Clostridium tetani
a. Clostridium perfringens
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
Which of these in pseudomonas causes systemic infection?
a. Pilli
b. Fimbriae
c. Flagella
d. Exo and endotoxins
d. Exo and endotoxins
Which antibiotic is used to treat pseudomonas aurginosa?
a. Cefotazime
b. Ceftazidime
c. Ampicillin
d. Tetracycline
b. Ceftazidime
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
