Microbiology Chapter 14 Test Bank
A commensal bacterium
A) does not receive any benefit from its host.
B) is beneficial to its host.
C) may also be an opportunistic pathogen.
D) isn't capable of causing disease in its host.
E) always causes disease in its host. - ANSmay also be an opportunistic pathogen
Which of the following statements is TRUE?
A) Both members are harmed in a symbiotic relationship.
B) Members of a symbiotic relationship cannot live without each other.
C) A parasite is not in symbiosis with its host.
D) Symbiosis always refers to different organisms living together and benefiting from each other.
E) At least one member must benefit in a symbiotic relationship. - ANSat least one member
must benefit in a symbiotic relationship
A nosocomial infection is
A) always present, but is inapparent at the time of hospitalization.
B) acquired during the course of hospitalization.
C) always caused by medical personnel.
D) only a result of surgery.
E) always caused by pathogenic bacteria - ANSacquired during the course of hospitalization
The major significance of Robert Koch's work is that
A) microorganisms are present in a diseased animal.
B) diseases can be transmitted from one animal to another.
C) microorganisms can be cultured.
D) microorganisms cause disease.
E) microorganisms are the result of disease - ANSmicroorganisms cause diesease
Which of the following is NOT a verified exception in the use of Koch's postulates?
A) Some diseases have poorly defined etiologies.
B) Some pathogens can cause several disease conditions.
C) Some human diseases have no other known animal host.
D) Some diseases are not caused by microbes.
E) Some diseases are noncommunicable - ANSsome diseases are noncommunicable
Which of the following diseases is NOT spread by droplet infection?
A) botulism
B) tuberculosis
C) measles
, D) the common cold
E) diphtheria - ANSbotulism
Biological transmission differs from mechanical transmission in that biological transmission
A) occurs when a pathogen is carried on the feet of an insect.
B) involves fomites.
C) involves reproduction of a pathogen in an arthropod vector prior to transmission.
D) requires direct contact.
E) works only with noncommunicable diseases - ANSinvolves reproduction of a pathogen in an
arthropod vector prior to transmission
Which of the following definitions is INCORRECT?
A) endemic: a disease that is constantly present in a population
B) epidemic: a disease that is endemic across the world
C) pandemic: a disease that affects a large number of people in the world in a short time
D) sporadic: a disease that affects a population occasionally
E) incidence: number of new cases of a disease - ANSepidemic: a disease that is endemic
across the world
Focal infections initially start out as
A) sepsis.
B) bacteremia.
C) local infections.
D) septicemia.
E) systemic infections - ANSlocal infections
The rise in herd immunity amongst a population can be directly attributed to
A) increased use of antibiotics.
B) improved handwashing.
C) vaccinations.
D) antibiotic-resistant microorganisms.
E) None of the answers is correct - ANSvaccinations
Which one of the following does NOT contribute to the incidence of nosocomial infections?
A) antibiotic resistance
B) lapse in aseptic techniques
C) gram-negative cell walls
D) lack of handwashing
E) lack of insect control - ANSgram-negative cell walls
Transient microbiota differ from normal microbiota in that transient microbiota
A) cause diseases.
B) are found in a certain location on the host.
C) are always acquired by direct contact.
A commensal bacterium
A) does not receive any benefit from its host.
B) is beneficial to its host.
C) may also be an opportunistic pathogen.
D) isn't capable of causing disease in its host.
E) always causes disease in its host. - ANSmay also be an opportunistic pathogen
Which of the following statements is TRUE?
A) Both members are harmed in a symbiotic relationship.
B) Members of a symbiotic relationship cannot live without each other.
C) A parasite is not in symbiosis with its host.
D) Symbiosis always refers to different organisms living together and benefiting from each other.
E) At least one member must benefit in a symbiotic relationship. - ANSat least one member
must benefit in a symbiotic relationship
A nosocomial infection is
A) always present, but is inapparent at the time of hospitalization.
B) acquired during the course of hospitalization.
C) always caused by medical personnel.
D) only a result of surgery.
E) always caused by pathogenic bacteria - ANSacquired during the course of hospitalization
The major significance of Robert Koch's work is that
A) microorganisms are present in a diseased animal.
B) diseases can be transmitted from one animal to another.
C) microorganisms can be cultured.
D) microorganisms cause disease.
E) microorganisms are the result of disease - ANSmicroorganisms cause diesease
Which of the following is NOT a verified exception in the use of Koch's postulates?
A) Some diseases have poorly defined etiologies.
B) Some pathogens can cause several disease conditions.
C) Some human diseases have no other known animal host.
D) Some diseases are not caused by microbes.
E) Some diseases are noncommunicable - ANSsome diseases are noncommunicable
Which of the following diseases is NOT spread by droplet infection?
A) botulism
B) tuberculosis
C) measles
, D) the common cold
E) diphtheria - ANSbotulism
Biological transmission differs from mechanical transmission in that biological transmission
A) occurs when a pathogen is carried on the feet of an insect.
B) involves fomites.
C) involves reproduction of a pathogen in an arthropod vector prior to transmission.
D) requires direct contact.
E) works only with noncommunicable diseases - ANSinvolves reproduction of a pathogen in an
arthropod vector prior to transmission
Which of the following definitions is INCORRECT?
A) endemic: a disease that is constantly present in a population
B) epidemic: a disease that is endemic across the world
C) pandemic: a disease that affects a large number of people in the world in a short time
D) sporadic: a disease that affects a population occasionally
E) incidence: number of new cases of a disease - ANSepidemic: a disease that is endemic
across the world
Focal infections initially start out as
A) sepsis.
B) bacteremia.
C) local infections.
D) septicemia.
E) systemic infections - ANSlocal infections
The rise in herd immunity amongst a population can be directly attributed to
A) increased use of antibiotics.
B) improved handwashing.
C) vaccinations.
D) antibiotic-resistant microorganisms.
E) None of the answers is correct - ANSvaccinations
Which one of the following does NOT contribute to the incidence of nosocomial infections?
A) antibiotic resistance
B) lapse in aseptic techniques
C) gram-negative cell walls
D) lack of handwashing
E) lack of insect control - ANSgram-negative cell walls
Transient microbiota differ from normal microbiota in that transient microbiota
A) cause diseases.
B) are found in a certain location on the host.
C) are always acquired by direct contact.
