NR 503 Week 8 Final Exam; Student
Consult Questions with Rationale
(Complete solutions and resources for the course exam)
Question . 1
Which . of .the . following . is .a .condition .which . may .occur .during .the . incubation .period?
• Onset .of .clinical . illness
• Receipt .of . infection
• Signs .and .symptoms .of .disease
• Transmission .of .infection
• Isolation .of . disease .carrier . through . quarantine
Rationale .:The .incubation .period .is .defined .as .the .interval .from .receipt .of
.infection .to . the .time .of .onset .of .clinical .illness. .Accordingly, .individuals .may
.transmit .infectious .agents . during .the .incubation .period .as .they .show .no .signs .of
.disease .that .would .enable .the .isolation .of . sick .individuals .by .quarantine.
Question . 2
Chicken .pox .is .a .highly .communicable .disease. .It .may .be .transmitted .by .direct .contact
.with .a . person .infected .with .the .varicella-zoster .virus .(VZV). .The .typical .incubation
.time .is .between .10 . to .20 .days. .A .boy .started .school .2 .weeks .after .showing
.symptoms .of .chicken .pox .including .mild . fever, .skin .rash, .and .fluid-filled .blisters.
.One .month .after .the .boy .returned .to .school, .none .of .his . classmates .had .been
.infected .by .VZV. .The .main .reason .was:
• Herd .immunity
• All . had .been . immunized .prior .to .the . school . year
• Contact .was .after .infectious .period
• Subclinical . infections . were .not . yet . detected
• Disease .was .endemic . in .the .class
The .disease .is .spread .by .contact .with .an .infected .individual .who .can .transmit .the
.agent .(VZV) .to . immunologically .naive .persons .during .the .incubation .period .and .for
.several .days .after .onset .of . clinical .illness. .Since .the .boy .started .school .14 .days .after
.showing .signs .consistent .with .chicken . pox, .it .is .most .likely .that .he .was .no .longer
.infectious.
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, Question . 3
The .ability .of .a .single .person .to .remain .free .of .clinical .illness .following .exposure .to
.an . infectious .agent .is .known .as:
• Hygiene
• Vaccination
• Herd .immunity
• Immunity
• Latency
Immunity . is . the . capacity . of . a . single . individual . to . avoid . disease . susceptibility . when
. exposed . to . an .infectious .agent. .Herd .immunity .is .a .population .characteristic. .For
.certain .diseases, .individual . immunity .can .be .acquired .by .vaccination, .but .this .is .not
.true .for .all .infectious
Question . 4
Which . of . the . following . is . characteristic . of . a . single-exposure, . common-vehicle . outbreak?
• Long . latency . period . before . many . illnesses . develop
• There . is . an .exponential . increase .in . secondary .cases . following . initial . exposures
• Cases .include .only .those .who . have .been .exposed .to .sick .persons
• The .epidemic .curve .has .a .normal .distribution .when .plotted .against .the
.logarithm .of . time
• Wide .range .in .incubation .times .for .sick .individuals
Single-exposure, .common-vehicle .outbreaks .involve .a .sudden, .rapid .increase .in .cases .of
.disease . that .are .limited .to .persons .who .share .a .common .exposure. .Additionally, .few
.secondary .cases . develop .among .persons .exposed .to .primary .cases. .A .histogram .of .the
.outbreak .can .plot .the . number .of .cases .by .time .of .disease .onset. .In .single-exposure,
.common-vehicle .outbreaks, .a .log . transformation .of .the .time .of .disease .onset .will
.often .take .on .the .characteristic .shape .of .a .normal . distribution .(i.e., .a .bell .curve) .with
.the .median .incubation .time .found .at .the .peak .of .the .curve.
What . is .the .diarrhea .attack .rate .in .persons .who .ate .both . ice .cream .and .pizza?
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Consult Questions with Rationale
(Complete solutions and resources for the course exam)
Question . 1
Which . of .the . following . is .a .condition .which . may .occur .during .the . incubation .period?
• Onset .of .clinical . illness
• Receipt .of . infection
• Signs .and .symptoms .of .disease
• Transmission .of .infection
• Isolation .of . disease .carrier . through . quarantine
Rationale .:The .incubation .period .is .defined .as .the .interval .from .receipt .of
.infection .to . the .time .of .onset .of .clinical .illness. .Accordingly, .individuals .may
.transmit .infectious .agents . during .the .incubation .period .as .they .show .no .signs .of
.disease .that .would .enable .the .isolation .of . sick .individuals .by .quarantine.
Question . 2
Chicken .pox .is .a .highly .communicable .disease. .It .may .be .transmitted .by .direct .contact
.with .a . person .infected .with .the .varicella-zoster .virus .(VZV). .The .typical .incubation
.time .is .between .10 . to .20 .days. .A .boy .started .school .2 .weeks .after .showing
.symptoms .of .chicken .pox .including .mild . fever, .skin .rash, .and .fluid-filled .blisters.
.One .month .after .the .boy .returned .to .school, .none .of .his . classmates .had .been
.infected .by .VZV. .The .main .reason .was:
• Herd .immunity
• All . had .been . immunized .prior .to .the . school . year
• Contact .was .after .infectious .period
• Subclinical . infections . were .not . yet . detected
• Disease .was .endemic . in .the .class
The .disease .is .spread .by .contact .with .an .infected .individual .who .can .transmit .the
.agent .(VZV) .to . immunologically .naive .persons .during .the .incubation .period .and .for
.several .days .after .onset .of . clinical .illness. .Since .the .boy .started .school .14 .days .after
.showing .signs .consistent .with .chicken . pox, .it .is .most .likely .that .he .was .no .longer
.infectious.
about:blank 1/32
, Question . 3
The .ability .of .a .single .person .to .remain .free .of .clinical .illness .following .exposure .to
.an . infectious .agent .is .known .as:
• Hygiene
• Vaccination
• Herd .immunity
• Immunity
• Latency
Immunity . is . the . capacity . of . a . single . individual . to . avoid . disease . susceptibility . when
. exposed . to . an .infectious .agent. .Herd .immunity .is .a .population .characteristic. .For
.certain .diseases, .individual . immunity .can .be .acquired .by .vaccination, .but .this .is .not
.true .for .all .infectious
Question . 4
Which . of . the . following . is . characteristic . of . a . single-exposure, . common-vehicle . outbreak?
• Long . latency . period . before . many . illnesses . develop
• There . is . an .exponential . increase .in . secondary .cases . following . initial . exposures
• Cases .include .only .those .who . have .been .exposed .to .sick .persons
• The .epidemic .curve .has .a .normal .distribution .when .plotted .against .the
.logarithm .of . time
• Wide .range .in .incubation .times .for .sick .individuals
Single-exposure, .common-vehicle .outbreaks .involve .a .sudden, .rapid .increase .in .cases .of
.disease . that .are .limited .to .persons .who .share .a .common .exposure. .Additionally, .few
.secondary .cases . develop .among .persons .exposed .to .primary .cases. .A .histogram .of .the
.outbreak .can .plot .the . number .of .cases .by .time .of .disease .onset. .In .single-exposure,
.common-vehicle .outbreaks, .a .log . transformation .of .the .time .of .disease .onset .will
.often .take .on .the .characteristic .shape .of .a .normal . distribution .(i.e., .a .bell .curve) .with
.the .median .incubation .time .found .at .the .peak .of .the .curve.
What . is .the .diarrhea .attack .rate .in .persons .who .ate .both . ice .cream .and .pizza?
about:blank 2/32
, This .is .a .preview
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