Multiple Choice Quiz


1	What is the usual habitat of endospore-forming bacteria that are agents of disease?
		A)	the intestine of animals
		B)	dust and soil
		C)	water
		D)	foods


2	Most Bacillus species are
		A)	true pathogens
		B)	opportunistic pathogens
		C)	nonpathogens
		D)	commensals


3	Many clostridial diseases require a/an ______ environment for their development.
		A)	living tissue
		B)	anaerobic
		C)	aerobic
		D)	low-pH


4	Clostridium perfringens causes
		A)	myonecrosis
		B)	food poisoning
		C)	antibiotic-induced colitis
		D)	both a and b


5	The action of tetanus exotoxin is on the
		A)	neuromuscular junction
		B)	sensory neurons
		C)	spinal interneurons
		D)	cerebral cortex


6	The probable habitat of Listeria is
		A)	the human intestine
		B)	animals
		C)	soil and water
		D)	plants


7	An infection peculiar to swine causes _______ when transmitted to humans.
		A)	anthrax
		B)	diphtheria
		C)	tuberculosis
		D)	erysipeloid


8	TB is spread by
		A)	contaminated fomites
		B)	food
		C)	respiratory droplets
		D)	vectors


9	Diagnosis of tuberculosis is by
		A)	X ray
		B)	Mantoux test
		C)	acid-fast stain
		D)	all of these


10	The form of leprosy associated with severe disfigurement of the face is
		A)	tuberculoid
		B)	lepromatous
		C)	borderline
		D)	papular


11	Soil mycobacteria can be the cause of
		A)	tuberculosis
		B)	leprosy
		C)	swimming pool granuloma


12	Caseous lesions containing inflammatory white blood cells are
		A)	lepromas
		B)	pseudomembranes
		C)	eschars
		D)	tubercles


13	Which infectious agent is an obligate parasite?
		A)	Mycobacterium tuberculosis
		B)	Corynebacterium diphtheriae
		C)	Mycobacterium leprae
		D)	Clostridium difficile


14	Which infectious agents are facultative pathogens?
		A)	Bacillus anthracis
		B)	Clostridium tetani
		C)	Clostridium perfringens
		D)	all of these


15	Which infection(s) would be categorized as a zoonosis?
		A)	anthrax
		B)	gas gangrene
		C)	diphtheria
		D)	both a and b


16	Actinomycetes are ______ that produce chronic granulomatous diseases.
		A)	filamentous bacteria
		B)	yeasts
		C)	molds
		D)	cocci

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