HEALTH SAFETY NUTRITION F/YOUNG CHILD L
10th Edition
ISBN: 9780357038642
Author: MAROTZ
Publisher: CENGAGE L
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Textbook Question
Chapter 5, Problem 2CR
Describe two examples that illustrate how an illness can be spread via:
a. airborne transmission
b. indirect contact
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All of the following are requirements for being a "carrier" of an infection, except:
a.
Active multiplication of the infectious agent in the body
b.
Absence of recognizable symptoms and signs of the infection
c.
Presence of the infectious agent in the body
d.
Ability to transmit the infection through excretions, discharges, and/or respiratory droplets
According to the natural history of disease model, the time before the precursors of disease and the host interact is called the period of:
A.
Prepathogenesis
B.
Pathogenesis
C.
Primogenesis
D.
B and C
Distinguish between direct and indirect transmission of disease.Cite at least one example of each
Chapter 5 Solutions
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- Why is it helpful for scientists to use models to simulate the spread of a communicable disease?arrow_forwardDifferentiate the terms in each of the following pairs a. etiology and pathogenesis b. infection and diseases c. communicable disease and noncommunicable diseasearrow_forwardDescribe the factors that contribute to the emergence or re-emergence of disease.arrow_forward
- What is disease causation theory? Define personalistic and naturalistic disease causation using films and/or readings.arrow_forwardWhich of the following describes "incubation period"? a. It is the time interval between entry of an infectious agent into the body and the appearence of the first symptoms and/or signs of the disease b. It is the time after recovery when a person can still harbor the infection c. It is the time interval through which an infected person is able to transmit the infectious agent to others d. It is the time interval between the onset of primary and secondary casesarrow_forwardBelow are a list of virulence factors/ strategies paired with an example of an organism that utilizes them. How do each of the following strategies contribute to the virulence of the pathogen? Strategy - Causes the host to produce more receptors (Organism - Rhinovirus) Strategy - Produces gas as a product of fermentation (Organism - Clostridium perfringens) Strategy - Produces a capsule (organism - Klebsiella pneumonia) Strategy - Ability to move between adjacent cells (organism - Cytomegalovirus) Strategy - Ability to use pilus as a motility structure (organism - Pseudomonas aerogenosa)arrow_forward
- The term active transmission refers to: a. A person who catches a disease from a bug bite b. A person who catches a disease from contaminated food c. A person who catches a disease from a contaminated object d. A person who coughs in public and passes the disease to those around themarrow_forwardDefine the term pathogen. Using MRSA, NOROVIRUS, ATHLETES FOOT and MALARIA as examples, identify the microorganisms (causal agent) involved in each disease. Provide some information on the microorganism for each disease e.g. structure Discuss 3 routes of entry that disease causing organisms use to enter the body.arrow_forwardFoodborne pathogens often require the presence of a large number of microbes before an active infection results. These microbes would have a high A.) median infectious dose (ID50). B.) incubation period. C.) virulence. D.) median lethal dose (LD50). E.) mortality.arrow_forward
- Explain the concept of 'infection control' in a healthcare setting.arrow_forwardThe purpose of an analytical study is toa) identify the person, place, and time of an outbreak.b) identify risk factors that result in high frequencies of disease.c) assess the effectiveness of preventive measures.d) determine the effectiveness of a placebo.e) None of the abovearrow_forwardSelect all of the following that applies to the tradeoff between transmission and virulence that applies to many diseases. a) The tradeoff between transmission and virulence means that diseases always evolve to become more virulent. b) If greater virulence limits transmission, that disease will likely evolve to become less virulent than it could be. c) While making more copies of itself can increase the likelihood of transmission occurring, too much replication of the disease can make the host so sick it won't leave the house and spread the disease. d) A strain of a disease that replicates enough to be transmitted, but not so much that the host gets too sick to move, will be favored by natural selection over strains that either make the host too sick or do not replicate enough to be transmitted. e) If a disease can spread without making its host sick (e.g. when the host is asymptomatic), then the tradeoff between transmission and virulence…arrow_forward
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