Practice 1st Edition by Beth - Ch. 1-11, 9781284154948, with
Rationales
A commensal bacterium
A. does not infect its host.
B. does not receive any benefit from its host.
C. is beneficial to its host.
D. may also be an opportunistic pathogen.
E. is beneficial to, and does not infect, its host. - ANSWER: may also be an opportunistic pathogen
Which of the following statements is TRUE?
A. Members of a symbiotic relationship cannot live without each other.
B. At least one member must benefit in a symbiotic relationship.
C. At least one member must not benefit in a symbiotic relationship.
D. Symbiosis refers to different organisms living together and benefiting from each other.
E. A parasite is not in symbiosis with its host. - ANSWER: At least one member must benefit in a
symbiotic relationship
Koch observed Bacillus anthracis multiplying in the blood of cattle. What is this condition called?
A. septicemia
B. systemic infection
C. local infection
D. bacteremia
E. focal infection - ANSWER: septicemia
Which of the following definitions is INCORRECT?
A. pandemic: a disease that affects a large number of people in the world in a short time
B. sporadic: a disease that affects a population occasionally
C. epidemic: a disease that is endemic across the world
D. incidence: number of new cases of a disease
E. endemic: a disease that is constantly present in a population - ANSWER: epidemic: a disease that is
endemic across the world
A disease in which the causative agent remains inactive for a time before producing symptoms is
referred to as
A. latent.
B. subacute.
C. subclinical.
D. acute.
E. zoonotic. - ANSWER: latent
Which of the following is NOT a communicable diseases?
A. tetanus
B. AIDS
C. tuberculosis
D. typhoid fever
E. malaria - ANSWER: tetanus
, Biological transmission differs from mechanical transmission in that biological transmission
A. involves fomites.
B. requires direct contact.
C. requires an arthropod.
D. involves specific diseases.
E. works only with noncommunicable diseases. - ANSWER: involves specific diseases
A needlestick is an example of
A. vector.
B. .fomite
C. direct contact.
D. vehicle transmission.
E. droplet transmission - ANSWER: fomite
A patient acquires an infection by touching a contaminated door handle. Which mode of transmission
best describes this scenario?
A. direct contact transmission
B. indirect contact transmission
C. droplet transmission
D. vehicle transmission - ANSWER: indirect contact transmission
A dog develops a diarrheal disease after drinking water from a creek during a hike with his owner.
Which of the following best describes this method of disease transmission?
A. contact transmission
B. vector transmission
C. vehicle transmission
D. There is not enough information to determine the mode of transmission. - ANSWER: vehicle
transmission
Plague is transmitted through the bite of an infected flea. Which of the following best describes this
mode of transmission?
A. direct contact transmission
B. indirect contact transmission
C. vehicle transmission
D. vector transmission - ANSWER: vector transmission
Which of the following would be considered a fomite?
A. An infected toy
B. A tick
C. A fly
D. Contaminated water - ANSWER: An infected toy
Which of the following would be considered a vector?
A. Water containing bacteria from fecal matter
B. Saliva that is transmitted between individuals during kissing
C. A fly carrying disease from fecal matter to food
D. Water droplets that come from a sneeze from an infected individual - ANSWER: A fly carrying
disease from fecal matter to food