2017 micro Flashcards
What influenza A virus caused the 2009 influenza pandemic? A. H1N1 B. H3N2 C. H5N1 D. H2N1
A. H1N1
A 9-month-old neonate was diagnosed with septic arthritis. What is the most likely etiological agent? A. Streptococcus pyogenes B. Staphylococcus aureus C. Haemophilus influenzae D. Enterococcus faecalis
C. Haemophilus influenzae
What is the most likely cause of neonatal pneumonitis? A. Chlamydia psittaci B. Mycoplasma hominis C. Streptococcus pneumoniae D. Haemophilus influenzae
no answer
(The Dr said Mycoplasma hominis has the same symptoms as Chlamydia trachomatis, which causes neonatal pneumonia. Probably B)
Which of the following causes a latent infection? A. Treponema pallidum B. E. coli C. Vibrio cholera D. Staphylococcus aureus
A. Treponema pallidum
What characterizes the rash present in measles?
A. Petechial rash
B. Diffuse erythematous rash
C. Maculopapular rash
C. Maculopapular rash
How many segments are there in the genome of the influenza virus? A. 3 B. 5 C. 7 D. 8
D. 8
What can you find in a pathogenic strain of Entamoeba histolytica? A. Nuclei changes in cysts B. Nuclei changes in trophozoites C. Inclusion bodies in the cytoplasm D. Changes in strains
no answer given
What is a virulence factor of E. coli? A. Lipid A B. M protein C. Protein A D. Teichoic acid
A. Lipid A
Which is used by Enterohemorrhagic E. coli to produce hemolytic uremic syndrome? A. Heat labile toxin B. Heat stable toxin C. Shiga toxin D. Enterotoxin
C. Shiga toxin
Which of the following characterizes Chlamydia? A. Lack cell membrane B. Causes an opportunistic infection C. Resistant to ampicillin D. Requires rich artificial media
C. Resistant to ampicillin
Which of the following hepatitis viruses is the most common cause of fulminant hepatitis in pregnant women? A. Hepatitis E B. Hepatitis B C. Hepatitis C D. Hepatitis G
A. Hepatitis E
What is used to diagnose a malarial infection? A. Microscopy of thick blood smear B. Microscopy of thin blood film C. Serology D. PCR
B. Microscopy of thin blood film
What is a characteristic of Vibrio parahaemolyticus? A. Only affects humans B. Oxidase negative C. Causes food poisoning D. Causes bloody diarrhea
C. Causes food poisoning
What is the reservoir of Brucella melitensis? A. Cow B. Pig C. Sheep D. Dog
C. Sheep
Which organism can be stained with gram stain? A. Chlamydia trachomatis B. Haemophilus aegypticus C. Mycoplasma hominis D. Treponema pallidum
B. Haemophilus aegypticus
Which set of characteristics represents Staphylococcus pneumonia?
A. Gram positive cocci in chains & bile soluble
B. Gram positive diplococci & optochin sensitive
C. Gram positive diplococci & optochin resistant
D. Gram positive cocci in chains & optochin sensative
B. Gram positive diplococci & optochin sensitive
Which method is used to diagnose acute filarial infection?
A. Microscopy of lymphatics
B. Microscopy of nucleopore filtered blood
C. Microscopy of thick and thin blood
D. Serology for antibody detection
B. Microscopy of nucleopore filtered blood
What viral infection can be prevented by a live vaccine? A. Ebola B. Dengue C. Tick-borne encephalitis D. Yellow fever
D. Yellow fever
A 28-year-old male had a painless ulcer on his penis. What might be the causative agent? A. Treponema pallidum B. Treponema endemicum C. Treponema pertenue D. Treponema carateum
A. Treponema pallidum
What factor helps Clostridium tetani to survive in the soil? A. Capsule B. Spores C. Fimbria D. Biofilm
B. Spores
Which enzyme is produced by both Helicobacter pylori and Proteus mirabilis? A. Coagulase B. Catalase C. Urease D. Oxidase
C. Urease
What characterizes Vibrio cholera? A. Yellow colonies on TCBS agar B. Non-motile C. Oxidase negative D. Causes mild, self-limiting illness
A. Yellow colonies on TCBS agar
Which bacteria causes peptic ulceration? A. Helicobacter pylori B. E. coli C. Shigella dysenteriae D. Haemophilus parainfluenzae
A. Helicobacter pylori
What allows Mycobacterium tuberculosis to be gram-stain resistant?
A. Phenolic glycolipid 1
B. Mycolic acid
C. Phospholipid bilayer
. Mycolic acid
What virulence factor of Legionella pneumophila is active in both macrophages and amoeba? A. pmi B. mak C. mip/mil D. dot/icm
D. dot/icm
What does Neisseria meningitidis use to adhere onto mucosal surface of the nasopharynx? A. Fimbria B. Outer membrane proteins C. Type IV pilus D. Lipo-oligosaccharides
C. Type IV pilus
Haemophilus influenzae requires both X and V factors in order to grow. Which culture can be used for its growth? A. Blood agar B. Lowenstein-Jensen culture C. Chocolate agar D. TCBS agar
C. Chocolate agar
Which of the following characterizes Pseudomonas aeruginosa? A. Gram negative non-motile bacilli B. Produces greenish diffusible pigments C. Non-capsulated D. Oxidase negative
B. Produces greenish diffusible pigments
Which bacteria has a cut-glass appearance upon microscopic examination? A. Legionella pneumophila B. Pseudomonas aeruginosa C. Haemophilus influenzae D. Staphylococcus aureus
A. Legionella pneumophila
Which of the following fungi multiply within macrophages in order to evade the immune system? A. Candida albicans B. Aspergillus flavus C. Histoplasma capsulatum D. Coccoidea immitis
C. Histoplasma capsulatum
Which of the following causes double zone hemolysis on blood agar by Clostridium perfringens? A. Alpha toxin B. Theta toxin C. Heat-resistant spores D. Heat-labile spores
B. Theta toxin
Which anaerobic species causes food poisoning after ingesting preformed toxins? A. Clostridium botulinum B. Clostridium difficile C. Clostridium tetani D. Clostridium perfringens
A. Clostridium botulinum
A 65-year-old man has hospital-acquired diarrhea and is on long-term use of antibiotics. Which of the following is the most likely cause to his illness?
A. Enteroinvasive E. coli
B. Vibrio cholera
C. Clostridium difficle
C. Clostridium difficle
Which herpesvirus has the largest genome? A. Cytomegalovirus B. Herpes simplex virus 1 C. Epstein-Barr virus D. Varicella-zoster virus
A. Cytomegalovirus
What rash characterizes smallpox rash?
A. Centripetal
B. Centrifugal
C. Disseminated
B. Centrifugal
What is the mode of transmission of molluscum contagiosum? A. Respiratory droplets B. Blood transfusion C. Direct contact D. Sexual intercourse
C. Direct contact
Which organ does Giardia lamblia target? A. Pancreas B. Colon C. Duodenum D. Jejunum
C. Duodenum
What is the pathogenesis of Cryptosporidium species?
A. Attaches to and damages the cell wall of jejunum
B. Produces enterotoxin and releases it into stomach
C. Attaches to and effaces lesions in the colon
A. Attaches to and damages the cell wall of jejunum
In which cells does the Leishmania parasite remain within? A. Hepatocytes B. Macrophages C. Red blood cells D. Lymphocytes
B. Macrophages
Which of the following is a symptom of Enterobius vermicularis? A. Perianal itching B. Mid-epigastric pain C. Bronchial pneumonia D. Anemia
A. Perianal itching
A man came into the hospital with lower abdominal pain. Examination revealed a cyst formation on the right lobe of the liver. Which diagnostic method should be used for this case? A. Biopsy of cyst B. Serology of antigens C. Serology of antibodies D. Microscopy of blood
C. Serology of antibodies
What is a major component of the fungal cell wall?
A. Glucan
B. Peptidoglycan
C. Phospholipids
A. Glucan
Which of the following would be found in a case of invasive aspergillosis?
A. Coenocytic hyphae
B. Budding yeast cells
C. Septate hyphae
C. Septate hyphae
Inhalation of which spores would give rise to infection by aspergillus? A. Sporangiospores B. Conidia spores C. Basidiospores D. Arthrospores
B. Conidia spores
The fungi that most commonly colonizes the oral mucosa is characterized by
A. Nonseptate hyphae
B. Yeast cells dividing by fission
C. Yeast cells with pseudohyphae
C. Yeast cells with pseudohyphae
Which fungus is identified as germ-tube positive? A. Cryptococcus neoformans B. Candida albicans C. Histoplasma capsulatum D. Blastomyces dermatitidis
B. Candida albicans
A man presented with fever, chills, constipation, and light pink spots on his legs. What is the most likely causative agent? A. Shigella B. Salmonella typhi C. Yersinia pseudotuberculosis D. Yersinia enterocolitica
B. Salmonella typhi
An 8-year-old African boy exhibited a lesion around his mouth and later, he exhibited a mucus patch in the oropharyngeal region. What is the name of this disease? A. Syphilis B. Yaws C. Pinta D. Bejel
D. Bejel
Which of the following fungi causes oral thrush? A. Candida albicans B. Aspergillus C. Pneumocystis jirovecii D. Microsporum gypseum
A. Candida albicans
