A community health nurse is teaching a group of older adult clients about hypertension. The nurse should identify which of the following as a client-related barrier to learning?

The correct answer is Choice D because, "Test a client who has a family history for diabetes mellitus." Secondary prevention refers to early detection and intervention to prevent the progression of disease. Testing individuals who have a family history of diabetes mellitus is an example of secondary prevention as it allows for early detection and intervention to prevent or delay the onset of diabetes.

Choice A is wrong because, "Educate a client who has hypertension about exercises to reduce blood pressure," is not the correct answer as it is an example of primary prevention, which focuses on preventing the development of disease or injury in individuals who are at risk. Hypertension is a risk factor for cardiovascular disease, and educating individuals about lifestyle modifications, such as exercise, can prevent the development of hypertension and other comorbidities.

Choice B is wrong because, "Teach a group of school-age children about hand hygiene," is not the correct answer as it is an example of primary prevention, which aims to prevent the occurrence of disease or injury in populations that are at risk. Hand hygiene is an essential component of infection control, and teaching school-age children about it can prevent the spread of infectious diseases in schools.

Choice C is wrong because, "Provide nutrition counseling for an adolescent who is underweight," is not the correct answer as it is an example of tertiary prevention, which focuses on preventing complications and reducing the impact of established disease or injury. Nutrition counseling for an adolescent who is underweight aims to prevent complications related to malnutrition, such as growth delays, cognitive impairment, and increased susceptibility to infections.

The correct answer is Choice D because, "Household contacts will receive prophylactic antibiotics." The nurse should include in the teaching that household contacts of the child with pertussis will receive prophylactic antibiotics to prevent the spread of the disease. This answer is correct because pertussis is a highly contagious respiratory illness that spreads through respiratory droplets, and prophylactic antibiotics can help prevent the spread of the disease.

Choice A is wrong because is incorrect because a dehumidifier will not prevent the spread of pertussis.

Choice B is wrong because is incorrect because pertussis does not cause a rash.

Choice C is wrong because is incorrect because herd immunity occurs when a large percentage of the population is immunized against a disease, and pertussis is preventable with vaccination.