NR-442 Community Health Nursing - Set 2 - Part 1

Correct Answer: Withhold the booster and notify the prescriber

Anaphylaxis to a previous dose or a vaccine component is the one contraindication that applies to every vaccine. The nurse does not give the dose and reports the reaction so an allergy evaluation can be arranged. Option a is incorrect because a longer observation period is the response to a history of milder allergic-type reactions, not to true anaphylaxis. Watching someone closely does not make a life-threatening reaction acceptable to provoke. Option b is incorrect because antihistamines blunt hives and itching but do nothing to prevent airway edema or cardiovascular collapse. Premedication offers false reassurance and would delay recognition of a reaction already known to occur. Option d is incorrect because splitting a dose is not an approved technique for any vaccine and would not lower the risk. Even a fraction of the antigen can trigger anaphylaxis in a previously sensitized person.

Correct Answer: A case-control study looking backward at exposure

The investigators started with the outcome, assembling people who already had the disease plus comparable people who did not, and then looked backward at exposure history. That backward direction from outcome to exposure defines a case-control study. Option b is incorrect because a prospective cohort begins with disease free people classified by exposure and follows them forward until illness appears. Here the cancer already existed when enrollment happened, so no forward follow-up was possible. Option c is incorrect because a cross-sectional survey captures exposure and outcome at one single moment and reports prevalence. These investigators deliberately selected people by disease status first, which a snapshot survey never does. Option d is incorrect because experimental designs require the investigator to assign the exposure, and assigning a suspected carcinogen to human beings would be unethical. Interviewing people about exposures they chose or encountered is observation, not assignment.

Correct Answer: Donated antibody protects now, vaccine protects later

Immune globulin is artificial passive immunity, giving ready-made antibody that works at once but fades without memory. The vaccine is artificial active immunity, slower to develop but durable, so together they cover today and the weeks ahead. Option a is incorrect because passive and active immunity differ in exactly the way that matters here. Donated antibody is consumed and never generates memory cells, so it cannot match what the client's own immune response will build. Option b is incorrect because it reverses the two products. A vaccine needs one to two weeks before antibody appears, which is far too slow for a rabies exposure, while the globulin acts on the day it is given. Option d is incorrect because most animal bites call for wound care and a tetanus review rather than rabies prophylaxis. The combined regimen here follows from a bat exposure specifically, not from a blanket rule about bites.

Correct Answer: The survey cannot show which came first

A cross-sectional survey measures exposure and outcome at the same moment, so it cannot establish that social media use preceded the depression. Temporality is the one criterion for causation that can never be waived. Option b is incorrect because enlarging a sample sharpens precision without repairing a design that cannot order events in time. A bigger snapshot survey would still leave the direction of the relationship completely unresolved. Option c is incorrect because the strength of the association is not what is missing from this argument. Even a very strong association measured at one moment leaves open the possibility that depression drove the media use. Option d is incorrect because a relative risk cannot be produced by this design at all, since nobody was followed forward from exposure to outcome. Reaching for a larger number sidesteps the structural flaw entirely.

Correct Answer: It is a retrospective cohort yielding incidence data

The investigators started from exposure and moved forward to outcome, but everything had already occurred and was reconstructed from records. That is a retrospective cohort, which keeps cohort logic while costing far less than prospective follow-up. Option a is incorrect because case-control work begins by selecting people according to whether they have the disease. These investigators grouped workers by what they were exposed to, which starts the study at the opposite end. Option b is incorrect because a prevalence survey freezes exposure and outcome at one moment with no passage of time between them. Tracing illnesses that developed years after employment requires a design that spans time. Option d is incorrect because an experiment requires the researcher to hand out the exposure, and these workers encountered chemicals through their jobs. Observing what happened to people is not the same as assigning what happens.

Correct Answer: The excessive heat causing thermal injury

The agent is the factor that must be present for the condition to occur, and it can be physical rather than infectious. Excessive heat is the physical agent here, while the apartment is environment and age is host. Option a is incorrect because housing conditions sit in the environment leg, describing what surrounds the person. A hot upper-floor unit without cooling raises exposure, yet it is not the force that injures body tissue. Option b is incorrect because medication acts on the host's physiologic state, increasing vulnerability to fluid loss. It shapes how badly this resident is affected but is not the element that produces heat illness. Option c is incorrect because age is a classic host characteristic, along with sex, genetics, and existing disease. Older adults tolerate heat poorly, which explains susceptibility rather than identifying what the person is exposed to.

Correct Answer: Administer all the scheduled vaccines today

Mild illness, a low-grade fever and current antibiotic therapy are all false contraindications. Withholding vaccine for them is the leading avoidable cause of missed opportunities, so the nurse gives every dose that is due. Option b is incorrect because antibiotics do not interfere with any routine vaccine or with the immune response to it. Treating an ear infection is not a reason to send a child away unprotected. Option c is incorrect because live vaccines are restricted by pregnancy and severe immunosuppression, neither of which applies here. Splitting the visit into safe and unsafe products invents a rule that does not exist. Option d is incorrect because a moderate or severe acute illness is the precaution that justifies deferral, and this child has neither. Sending the family home guarantees another visit and risks the series falling behind.

Correct Answer: The attack rate among those who attended

Attack rate divides the number who became ill by the number exposed or at risk, expressed for the short period of an outbreak. It answers precisely how much of the exposed group fell ill. Option a is incorrect because case fatality reports how many people with the disease died from it. Nothing in this scenario concerns deaths, and the nurse asked about illness among the people who ate the meal. Option b is incorrect because point prevalence counts everyone with the condition in a whole population at one moment. That denominator includes residents who never attended, which hides the exposure the nurse is trying to size. Option c is incorrect because the secondary measure follows spread from primary cases to their contacts and gauges communicability. It excludes the original cases, so it cannot describe what happened among the supper guests themselves.

Correct Answer: Sentinel surveillance using selected reporting sites

Sentinel surveillance gathers data from a limited set of chosen high quality sites rather than from everyone. It buys good trend information cheaply, though the counts it produces are never a complete tally of all cases. Option a is incorrect because passive reporting accepts whatever any provider happens to send in, with no site chosen in advance. The deliberate selection of particular clinics is what separates this arrangement from routine reporting. Option b is incorrect because a registry compiles complete long term records on every person with one condition, such as cancer or a birth defect. Weekly counts of a symptom pattern serve a different purpose entirely. Option d is incorrect because active systems reach out to all providers in the area, soliciting case details clinic by clinic. Most clinics in this state are reporting nothing, so no such outreach is happening.

Correct Answer: Weekly isoniazid and rifapentine for three months.

Latent infection is treated with short rifamycin based regimens, and weekly isoniazid with rifapentine over three months is a preferred option. Shorter courses are completed far more often and cause less liver injury than long isoniazid alone. Option b is incorrect because the isoniazid and rifampin combination for latent infection runs three months daily, not nine. Nine months describes isoniazid taken alone, an alternative regimen with the poorest completion rate. Option c is incorrect because the four drug intensive phase treats active disease, where a large organism burden must be reduced quickly. This client has no disease, so adding pyrazinamide and ethambutol would bring toxicity without benefit. Option d is incorrect because pyrazinamide belongs to the treatment of active disease and is not part of any preferred latent infection regimen. The rifampin based short option is rifampin taken alone daily for four months.

Correct Answer: The reading is positive at this client's lower threshold.

People living with HIV use the five millimeter cut point because immunosuppression blunts the skin response and the consequences of missed infection are severe. Six millimeters of induration therefore reads as positive and requires chest imaging. Option a is incorrect because erythema is never measured; only the firm palpable induration counts. A reading with no redness at all can still be positive, and redness without induration is scored as zero. Option b is incorrect because the ten millimeter threshold belongs to groups such as shelter residents, injection drug users, and people born in high burden countries. Immunosuppression moves this client into the lowest cut point instead. Option c is incorrect because feeling well says nothing about whether infection is present. Latent infection is by definition symptom free, which is exactly why screening tests exist for people at high risk of progression.

Correct Answer: The age-specific death rates for each adult group

An age-specific rate restricts both numerator and denominator to the same age group, which is the only way to see whether one age band carries excess mortality hidden inside a matching overall figure. Option b is incorrect because that measure divides deaths from a cause by all deaths and yields a share, not a risk. It would show what young adults died of without revealing whether more of them died. Option c is incorrect because adjustment collapses every age group into one summary number designed for comparing whole populations. Collapsing the data would bury exactly the age pattern the nurse is trying to expose. Option d is incorrect because case fatality describes severity among people who already have a named disease. The nurse is asking who in the community is dying, a question that needs population denominators instead.

Correct Answer: Taking one drug alone lets resistant organisms take over.

A tuberculosis population always contains a few naturally resistant mutants. A single drug kills the susceptible organisms and leaves those mutants to multiply, so all prescribed drugs are held until the full combination is available. Option a is incorrect because maintaining a blood level of one agent is not the goal of combination therapy. The point is to attack the organism along several pathways at once so no surviving subpopulation is left. Option b is incorrect because even brief single drug exposure can select resistant organisms in a large bacterial population. Days of monotherapy have produced resistance that then requires years of second line treatment. Option d is incorrect because nothing about partial dosing shortens a course; the opposite happens. Interrupted or incomplete regimens extend treatment, and the intensive phase runs two months precisely because all four drugs work together.

Correct Answer: Prevalence rises while incidence stays unchanged

Prevalence equals incidence times average duration. Longer survival keeps people in the case pool, so the burden counted at any moment climbs even though the number of new diagnoses each year is unchanged. Option a is incorrect because incidence counts only new cases appearing in a period. Treatment that extends survival does nothing to change how many people cross into disease each year, so that figure holds steady. Option c is incorrect because a decline in both measures would require fewer people developing the disease and shorter survival. The scenario describes the opposite for duration and no change at all in new diagnoses. Option d is incorrect because falling prevalence happens when cases leave the pool quickly through cure or rapid death. Here people are living longer with the condition, which holds them in the count rather than removing them.

Correct Answer: Watch a stable client swallow the scheduled doses.

Observing a stable client take prescribed doses is a structured task with a predictable outcome, well within a trained outreach worker's scope. Assessment, teaching, and clinical judgment stay with the nurse. Option b is incorrect because reading induration and applying the correct cut point require nursing judgment about the client's risk category. The same measurement means different things in different people, so it cannot be handed off. Option c is incorrect because initial teaching is a nursing responsibility that depends on assessing what the client already knows and understands. An outreach worker may reinforce points later but does not deliver the first instruction. Option d is incorrect because placement decisions rest on symptoms, sputum results, and infectiousness, which is clinical evaluation. Handing that call to unlicensed personnel could leave an infectious client in shared air.

Correct Answer: Breathing air that holds suspended droplet nuclei spreads it.

Tuberculosis is airborne. Coughing, singing, or speaking aerosolizes bacilli into droplet nuclei that remain suspended on air currents, so household members who share enclosed air for long periods become infected by inhaling them. Option a is incorrect because shared dishes and utensils have never been shown to transmit the bacillus. Families often restrict eating together out of fear, which isolates the client without lowering anyone's actual risk. Option b is incorrect because linens and clothing do not carry tuberculosis to a new host. Fomite transmission belongs to organisms such as scabies or norovirus, and reassuring the family about laundry reduces needless fear. Option d is incorrect because surfaces play no part in tuberculosis spread; the organism needs the respiratory tract, not a hand to mouth route. Scrubbing bathrooms answers a different infection problem and leaves the air uncontrolled.

Correct Answer: I can rely on my birth control pills.

Rifampin is a potent enzyme inducer that speeds hormone metabolism and makes oral contraceptives fail. The client needs an additional or nonhormonal method for the whole course, so this statement shows the teaching did not take hold. Option a is incorrect because it shows accurate understanding. Pyrazinamide raises uric acid and can precipitate gout, so reporting joint pain or a hot, swollen great toe is exactly what the nurse asked for. Option c is incorrect because switching to glasses is correct advice. Rifampin tints tears and permanently stains soft lenses, so a client who plans around that has understood one of the drug's practical effects. Option d is incorrect because vigilance about eyesight is the central teaching point for ethambutol. Optic neuritis threatens acuity and red green discrimination, and prompt reporting lets the drug be stopped before damage becomes permanent.

Correct Answer: Hepatitis B immune globulin plus vaccine promptly

Post-exposure management for hepatitis B in an unvaccinated person is hepatitis B immune globulin plus the vaccine series, both as soon as possible. The globulin gives immediate donated antibody while the vaccine builds lasting protection. Option a is incorrect because vaccine alone leaves the nurse unprotected during the weeks her own antibody takes to appear, and a two-week delay wastes the window when prophylaxis works best. Both products belong here, and both belong now. Option b is incorrect because a four-week antiretroviral course is the regimen for an HIV exposure, not a hepatitis B one. Matching the pathogen to its own prophylaxis is the whole point of the exposure protocol. Option c is incorrect because donated antibody fades within weeks and leaves no memory behind. Skipping the vaccine would protect this nurse only through the current exposure and would leave her susceptible at the next needlestick.

Correct Answer: Reviewing charts to list residents with existing diagnoses

Pulling documented diagnoses from charts follows a defined standard and falls within the practical nurse's data collection role. Choosing denominators, setting priorities, and reporting conclusions to officials remain with the registered nurse. Option a is incorrect because defining who could actually develop the condition determines whether the whole measure is valid. That decision requires understanding what prevalence counts and belongs to the registered nurse alone. Option c is incorrect because setting priorities among competing community problems weighs magnitude, severity, preventability, and trend. Such planning judgment sits outside the practical nurse's scope no matter how experienced the individual is. Option d is incorrect because presenting findings commits the agency to an interpretation and invites questions demanding analysis. Gathering the numbers can be shared, while explaining what they mean stays a registered nurse responsibility.

Correct Answer: The infant mortality rate for the county

Infant mortality counts deaths before the first birthday against live births in the same period. It is treated as a sensitive indicator of overall community health because prenatal care, nutrition, sanitation, and access all affect it. Option a is incorrect because case fatality measures deaths among people who already have a specified disease, showing how severe that illness is. Its denominator is cases, not the live births named in this profile. Option b is incorrect because a crude death rate counts all deaths at every age against the whole population. Restricting the numerator to infants and the denominator to live births produces a different measure entirely. Option d is incorrect because the neonatal measure stops at twenty-eight days of life rather than covering the first year. Deaths occurring later in infancy would be left out, and this profile describes the full year.