question
Which of the following is the most likely characteristic of Campylobacter Jejune
answer
Acquired as a zoonotic infection, often from undercooked chicken and causes a mild, self-limiting gastroenteritis
question
To what surface feature of enteric bacteria does the term H-antigen refer?
answer
Flagella
question
What is not a property associated with Salmonella enterica serovar typhi?
answer
Produces a cholera-like toxin
question
Which bacterium produces the vast majority (70-90%) of urinary tract infections (bladder infections, for example)
answer
Escherichia Coli
question
Which of the following is not a virulence factor for Helicobacter pylori
answer
Shiga like toxin
question
Hemolytic uremic syndrome is a complication of infection by which organism?
answer
Escherichia coli O157:H7
question
Shiga Toxin
answer
removes a specific adenine base from 28S rRNA, stopping translation
question
Which of the following is not a property of Pseudomonas aeruginosa?
answer
Obligate intracelllular pathogen
question
What is a property of the disaccharide-tetrapeptide component of bacterial peptidoglycan that is the tracheal cytotoxin of Bordetella pertussis
answer
It is shed from bacterial cells instead of being absorbed and recycled
question
These gram positive pleiomorphic rods produce a pseudo membrane in the throat that can block the airway
answer
Corynebacterium diptheriae
question
Clostridium botulinum produces an A-B exotoxin that blocks the release of which neurotransmitter from axon endings at neuromuscular junctions
answer
Acetylcholine
question
Which Clostridial species is part of the normal human bacterial flora?
answer
Clostridium difficile
question
Which organism produces alpha toxin (a lecithinase-phospholipase C) and theta toxin (a hemolytic toxin), that partially accounts for the organism's tissue-destructiveness that often requires amputation to save the patient's life?
answer
Clostridium perfringens
question
Which of the following best describes tetanospasmin, a virulence factor for Clostridium tetani
answer
A-B exotoxin that blocks release of the neurotransmitter glycine
question
This Gram-negative coccobacillus is transmitted zoonotically mainly from contact with wild animals such as birds, rabbits, or tick bites. The bacteria are able to grow in macrophages, resulting in systemic spread that can lead to ulceroglandular, occuloglandular, and pulmonary infections. A vaccine is available for high-risk individuals.
answer
Francisella tularensis
question
What virulence property does Haemophilius influenzae capsule b confer on these bacteria?
answer
Allows the bacteria to cause systemic infections
question
What bacterium lives inside amoeba in the environment and is typically transmitted by an aerosol route to humans through ventilation systems in buildings?
answer
Legionella pneumophila
question
What bacterium grows at temperatures from 1oC to 45oC, is resistant to salt and acid conditions, and is a food-borne pathogen that causes systemic disease in immune-compromised individuals
answer
Listeria monocytogenes
question
This gram negative coccobacillus is transmitted zoonotically via fleas and eventually infects lymph nodes, where it can cause a purulent infection. In some individuals the bacteria can subsequently spread to the lungs and be transmitted by aerosol from human to human
answer
yersinia pestis
question
Which of the following is true for Mycobacterium tuberculosis
answer
The bacterium exhibits a very slow growth rate (doubling time of 1 day)
question
A positive result with an acid-fast staining test on a sputum smear is indicative of which type of bacteria?
answer
Mycobacterium tuberculosis
question
Which of the following is true for cord factor of Mycobacterium tuberculosis
answer
Is a glycolipid that adheres to cell surface mycolic acids
question
Which of the following is true for leprosy
answer
Individuals normally clear the bacterial agent via cell-mediated immunity
question
Bacteria of which genus are gram positive filamentous rods that are opportunistic pathogens, causing bronchopulmonary infections and brain abscesses
answer
Nocardia
question
A zoonotic disease is associated with which of the following bacteria
answer
Borrelia burgdorferi
question
Which form of Chlamydia replicated within a host cell
answer
reticulate body
question
What is true about Mycoplasma pneumoniae
answer
Immune protection fades after recovery from infection
question
Bacteria of which genus causes Rocky Mountain Spotted Fever?
answer
Rickettsia
question
Which of the following is best associated with the viridans Streptococci?
answer
Dental caries
question
What symptoms are uniquely associated with tertiary syphilis?
answer
Gummas
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