Question

1) Sunny Acres Nursing Home has a total population of 100 residents. In the month of April, they recorded a total of 20 cases of Legionnaire's disease, with 5 new infections occurring that month. Based on this information, which number corresponds to the incidence of Legionnaire's disease in April at Sunny Acres?

a) 5% b) 20% c) 25% d) 95% e) None of the above.

2) During the course of infectious disease, the time from initial contact with a pathogen to the development of observable symptoms is referred to as the___.

a) Acute Phase b)Incubation period c) prodromal phase d) convalescence phase e) endemic phase

3) Herd immunity is affected by ___.

a) the percentage of a population that is vaccinated against the disease

b) The strength of an individual's immune system to the pathogen causing disease

c) the number of individuals that are susceptible to the pathogen causing disease

d) all of the above

4) Malaria is an infectious disease that is prevalent in sub -Saharan Africa. Countries within this region have a fairly constant burden of this disease within the population. Based on this information, we say that malaria is ________ to sub-Sharan Africa

5) A 48-year old male acquires a primary infection with the Varicella-Zoster virus. Which disease will this individual experience?

a) genital warts b) infectious mononucleosis c)chickenpox d) shingles e) fifth disease

Answer 1

1. The incidence of a disease= (number of new cases of any disease in a given time period/ total number of the population at risk at the sam time period) X 100

=(5/20) X 100

= 25 %

Hence option C is correct.

2. During the course of infectious disease, the time from initial contact with a pathogen to the development of observable symptoms is referred to as the Incubation period. Hence option B is correct.

3. Herd immunity is affected by all of the above. hence option D is correct.

4. Malaria is an infectious disease that is prevalent in sub -Saharan Africa. Countries within this region have a fairly constant burden of this disease within the population. Based on this information, we say that malaria is epidemic prone to sub-Sharan Africa.

5. The individual will experience chicken pox as it is a primary infection with the Varicella-Zoster virus. Hence option C is correct.