超星 - Quiz of lecture 11

单选题

Which type of infection does not belong to nosocomial infection?

A. The doctors acquire the pathogens from their patients when he examine the patient.
B. The pathogens invade the wound of a worker when he participated inconstruction of a new hospital.
C. The patient's infection was caused by not sterilized surgical scalpels .
D. The newly born baby get infection during delivery.

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单选题

Which statement is right about endotoxin?

A. It is inactivated by 56℃within 30min,
B. Toxoid can be made from endotoxin,
C. They are LPS produced by G- bacteria,
D. They are best antigens.

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单选题

Which statement about comparison between exotoxins and endotoxins is not correct ?

A. They are less toxicthan exotoxins
B. They are more stable on heating than exotoxins
C. They bind to specific cell receptors，whereas exotoxins do not
D. They are part of the bacterial cell wall，whereas exotoxins are not.

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单选题

Which one of the following statements about exotoxins is not correct ?

A. When treated chemically，some exotoxins lose their toxicity to become toxoid.
B. Some exotoxins are capable of causing disease in purified form，free of any bacteria
C. Some exotoxins act in the gastrointestinal tract to cause diarrhea
D. Some exotoxins contain lipopolysaccharides as the toxic component

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单选题

Which one of the following statements concerning exotoxins is not correct ?

A. Exotoxins are polypeptides
B. Exotoxins are more easily inactivated by heat than are endotoxins;
C. Exotoxins are less toxic than the same amount of endotoxins;
D. Exotoxins can be converted to toxoids;

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单选题

Which term describes the objective manifestations of disease thatcan be observed or measured by doctors?

A. Signs
B. symptoms
C. syndromes
D. infection

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单选题

Which term describes subjective characteristics of a disease that can be felt by the patient alone?

A. Signs
B. symptoms
C. syndromes
D. infection

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单选题

Which mechanism about how LPS induces fever is not right?

A. LPS stimulate monocytes in blood to release IL6,IL1 and TNFa;
B. IL6,IL1 and TNFa are called endougenous pyrogens to stimulate hypothalamus and induce fever ;
C. IL6,IL1 and TNFa are elevated and circulaedin blood to reach brain;
D. LPS enter blood to reach hypothalamus directly to induce fever.

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单选题

Which statement about carrier is right?

A person with asymptomatic infection that can be transmitted to other persons. 
B. A person with symptomatic infection that can be transmitted to other persons. 
C. A person with symptomatic infection that can`t be transmitted to other persons. 
D. A person with asymptomatic infection that can`t be transmitted to other persons.

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单选题

Which statement about inapparent infection is not right?

A. The bacterial virulence is weaker, the immunity of the host is stronger;
B. No symptoms are found clinically by a doctor;
C. No pathogens are transmitted to other person;
D. Antibody may be induced in inapparent infection.

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