Which statement regarding the infectious dose is accurate? Maximal number of infectious particles necessary for death of host organism Minimal number of infectious particles necessary for death of host organism Minimal number of infectious particles necessary for signs and symptoms of disease Maximal number of infectious particles necessary for signs and symptoms of disease
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Step 1: The infectious dose is the minimum number of infectious particles required to cause infection in a host. Show more…
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A pathogenic bacterium has a low LD50. Which of the following statements about the bacteria is true? a. A small dose of an antibiotic drug is sufficient to kill the bacteria b. The bacteria have a low virulence c. Only a few of the bacteria are required to kill 50% of infected hosts d. The bacteria must have a high ID50
Sri K.
4.Which of the following is more likely to cause an infection? a) Gonorrhea - ID50 = 1,000 cells b) Giardiasis - ID50 = 10 cells c) Typhoid fever - ID50 = 10,000 cells d) Cholera - 1, 000,000,000 cells 5.Select the mismatch. Select all that apply a) prevalence of an infection - number of new cases over a time period b) point-source epidemic - infectious agents that came from a single source. c) Epidemic - a disease that is commonly found in a region. d) Incidence of an infection - overall number of an infection in a population e) endemic - a disease that is easily spread f) morbidity rate - overall death rate g) index case - first case that brought an epidemic h) mortality rate - total number of deaths in a population 6.HIV infection may not lead to AIDS for many years or decades. HIV/AIDS is best described as a) chronic disease b) morbid disease c) acute disease d) Idiopathic
Rhinovirus causes the common cold after very few viral particles enter a person. Additionally, very few people die of the common cold. Which of the following statements best describes the rhinovirus? Low ID50 and high LD50 High ID50 and low LD50 Low ID50 and low LD50 High ID50 and high LD50
Madhur L.
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