CH 14 End of chap Multiple choice

The emergence of new infectious diseases is probably due to all of the following except

The need of bacteria to cause disease.

All members of a group of ornithologists studying barn owls in the wild have had salmonellosis (Salmonella gastroenteritis). One birder is experiencing her third infection. What is the most likely source of their infections?

a)"The ornithologists are eating the same food. "

b)"They are contaminating their hands while handling the owls and nests."

c)"One of the workers is a Salmonella carrier. "

d)"Their drinking water is contaminated."

They are contaminating their hands while handling the owls and nests.

Which of the following statements is false?

a)E. coli never causes disease.

b)E. coli provides vitamin K for its host.

c)E. coli often exists in a mutualistic relationship with humans.

d)A disease-causing strain of E. coli causes bloody diarrhea.

E. coli never causes disease.

"Which of the following is not one of Koch's postulates?

a)The same pathogen must be present in every case of the disease.

b)The pathogen must be isolated and grown in pure culture from the diseased host.

c)The pathogen from pure culture must cause the disease when inoculated into a healthy, susceptible laboratory animal.

d)The disease must be transmitted from a diseased animal to a healthy, susceptible animal by direct contact

.e)The pathogen must be isolated in pure culture from an experimentally infected lab animal."

The disease must be transmitted from a diseased animal to a healthy, susceptible animal by direct contact

"Which one of the following diseases is not correctly matched to its reservoir?

a)influenza— animal

b)rabies—animal

c)botulism—nonliving

d)anthrax—nonliving

e)toxoplasmosis—cats"

anthrax—nonliving

"On September 6, a 6-year-old boy experienced fever, chills, and vomiting. On September 7, he was hospitalized with diarrhea and swollen lymph nodes under both arms. On September 3, the boy had been scratched and bitten by a cat. The cat was found dead on September 5, and Yersinia pestis was isolated from the cat. Chloramphenicol was administered to the boy from September 7, when Y. pestis was isolated from him. On September 17, the boy's temperature returned to normal; and on September 22, he was released from the hospital.""Identify the incubation period for this case of bubonic plague.

a)September 3-5.

b)September 3-6.

c)September 6-7.

d)September 6-17. "

September 3-5.

On September 6, a 6-year-old boy experienced fever, chills, and vomiting. On September 7, he was hospitalized with diarrhea and swollen lymph nodes under both arms. On September 3, the boy had been scratched and bitten by a cat. The cat was found dead on September 5, and Yersinia pestis was isolated from the cat. Chloramphenicol was administered to the boy from September 7, when Y. pestis was isolated from him. On September 17, the boy's temperature returned to normal; and on September 22, he was released from the hospital.""Identify the prodromal period for this disease"

a)"September 3-5.

b)September 3-6.

c)September 6-7

.d)September 6-17."

September 6-7

"A Maryland woman was hospitalized with dehydration; Vibrio cholerae and Plesiomonas shigelloides were isolated from the patient. She had neither traveled outside the United States nor eaten raw shellfish during the preceding month. She had attended a party 2 days before her hospitalization. Two other people at the party had acute diarrheal illness and elevated levels of serum antibodies against Vibrio. Everyone at the party ate crabs and rice pudding with coconut milk. Crabs left over from this party were served at a second party. One of the 20 people at the second party had onset of mild diarrhea; specimens from 14 of these people were negative for vibriocidal antibodies.

This is an example of

a)vehicle transmission.

b)airborne transmission.

c)transmission by fomites.

d)direct contact transmission.

e)healthcare-associated transmission. "

vehicle transmission.

"A Maryland woman was hospitalized with dehydration; Vibrio cholerae and Plesiomonas shigelloides were isolated from the patient. She had neither traveled outside the United States nor eaten raw shellfish during the preceding month. She had attended a party 2 days before her hospitalization. Two other people at the party had acute diarrheal illness and elevated levels of serum antibodies against Vibrio. Everyone at the party ate crabs and rice pudding with coconut milk. Crabs left over from this party were served at a second party. One of the 20 people at the second party had onset of mild diarrhea; specimens from 14 of these people were negative for vibriocidal antibodies.

The etiologic agent of the disease is

- Plesiomonas shigelloides.

- crabs.

- V. cholerae.

- coconut milk.

- rice.

V. cholerae

A Maryland woman was hospitalized with dehydration; Vibrio cholerae and Plesiomonas shigelloides were isolated from the patient. She had neither traveled outside the United States nor eaten raw shellfish during the preceding month. She had attended a party 2 days before her hospitalization. Two other people at the party had acute diarrheal illness and elevated levels of serum antibodies against Vibrio. Everyone at the party ate crabs and rice pudding with coconut milk. Crabs left over from this party were served at a second party. One of the 20 people at the second party had onset of mild diarrhea; specimens from 14 of these people were negative for vibriocidal antibodies.

The source of the disease was

- Plesiomonas shigelloides.

- crabs.

- V. cholerae.

- coconut milk.

- rice.

crabs