An elderly man with chronic heart and lung disease develops Legionella pneumonia. By what route was the infection most likely to have been acquired?
a. Respiratory route, from an infected person
b. Inhalation of aerosolized water from a source containing protozoa
c. Inhalation of spores from moldy hay
d. Exposure to livestock or animal products
B
Legionella infections are acquired exclusively from environmental sources; no person-to-person spread has been documented. Inhalation and aspiration of infectious aerosols (1 to 5 m in di-ameter) are considered the primary means of transmission. Exposure to these aerosols can occur in the workplace or in industrial or health care settings.
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The age structure diagram for rapidly growing populations:
a. is in the form of an hour glass, with large young and old populations b. is characterized by a large percentage of the population in the postreproductive years c. has a small base showing a reduced number of young d. has about equal distribution between all age groups e. is in the form of a pyramid and has a very broad base showing a large number of young
citric acid cycle is equivalent to what terms
What will be an ideal response?
Which of the following describe a role that ethylene plays in plant physiology. (Check all that apply.)A) Retarding stem and root elongationB) Hastening the ripening of fruitC) Inhibition of leaf abscissionD) Inhibition of lateral bud growthE) Accelerates the loss of damaged fruits
What will be an ideal response?
Partially hydrogenated fats are also referred to as ________ fats
Fill in the blank(s) with correct word