The key to the prevention of a pandemic influenza is:

Correct Answer: A

Rationale: The key to preventing a pandemic influenza is early detection. Detecting influenza cases early allows for timely public health responses to limit the spread of the virus. Early detection helps in implementing measures such as isolation, treatment, and vaccination to prevent the development of a full-blown pandemic. Antibiotics are not effective against influenza viruses, so early antibiotic treatment is not the key to prevention. While vaccination of at-risk populations is important in controlling the spread of influenza, early detection is crucial as it allows for timely implementation of vaccination strategies. Isolation of suspected cases is a containment measure rather than a prevention strategy; the key to prevention lies in early detection to stop the spread before it becomes a pandemic.

Correct Answer: B

Rationale: False. HCV is not spread through casual contact such as hugging, sneezing, or sharing eating utensils. The correct modes of transmission for HCV include direct contact with human blood through blood transfusions, improperly sterilized needles and syringes, needle sharing, or occasionally through sexual contact. Therefore, the statement is false, making 'False' the correct answer. Choices A, C, and D are incorrect as they do not accurately reflect the mode of transmission of HCV.

Correct Answer: B

Rationale: In a hospitalized patient on prolonged bed rest, the most likely cause of sudden onset shortness of breath and chest pain is pulmonary embolism. Pregnancy and prolonged inactivity both increase the risk of clot formation in the deep veins of the legs, known as deep vein thrombosis (DVT). These clots can dislodge and travel to the lungs, causing a pulmonary embolism. Myocardial infarction (Choice A) is less likely in a young patient without a significant history of atherosclerosis. Anxiety attacks (Choice C) may present with similar symptoms but are less likely in this context. Congestive heart failure (Choice D) is less probable given the acute onset of symptoms and absence of typical signs like peripheral edema in this case.

Correct Answer: C

Rationale: The correct answer is 'Water loss is greater than electrolyte loss.' In hypertonic dehydration, there is a higher loss of water compared to electrolytes, leading to elevated concentrations of electrolytes in the body. This condition is characterized by plasma sodium levels above 150 mEq/L. As water moves from the extracellular space to the intracellular space, it results in cellular dehydration. Choice A is incorrect because the plasma sodium levels associated with hypertonic dehydration are typically above 150 mEq/L, not between 130 and 150 mEq/L. Choice B is incorrect as fluid moves from the extracellular space to the intracellular space in hypertonic dehydration. Choice D is incorrect because physical signs and symptoms may not always be grossly apparent in hypertonic dehydration.

Correct Answer: A

Rationale: The correct answer is that normally, the testes descend by one year of age. In young infants, it is common for the testes to retract into the inguinal canal when the environment is cold or the cremasteric reflex is stimulated. The exam should be done in a warm room with warm hands. It is most likely that both testes are present and will descend by a year. Option B is incorrect as not all cases of undescended testes require surgical intervention. Option C is incorrect because feeling only one testis does not necessarily mean the infant only has one testis. Option D is inaccurate as the testes do not normally descend by birth, but rather by one year of age. If the testes do not descend by one year, a full assessment will be needed to determine the appropriate treatment.

Correct Answer: A

Rationale: The key to preventing a pandemic influenza is early detection. Detecting influenza cases early allows for timely public health responses to limit the spread of the virus. Early detection helps in implementing measures such as isolation, treatment, and vaccination to prevent the development of a full-blown pandemic. Antibiotics are not effective against influenza viruses, so early antibiotic treatment is not the key to prevention. While vaccination of at-risk populations is important in controlling the spread of influenza, early detection is crucial as it allows for timely implementation of vaccination strategies. Isolation of suspected cases is a containment measure rather than a prevention strategy; the key to prevention lies in early detection to stop the spread before it becomes a pandemic.

Correct Answer: C

Rationale: Osgood-Schlatter disease occurs in adolescents during the rapid growth phase when the infrapatellar ligament of the quadriceps muscle pulls on the tibial tubercle, causing pain and swelling in the inferior aspect of the knee. The condition is commonly caused by activities that require repeated use of the quadriceps, such as track and soccer. Choice A is incorrect because Osgood-Schlatter disease is not specifically linked to competitive swimming. Choice B is incorrect as surgical intervention is not usually necessary for this condition. Choice D is incorrect as the student is not trying to avoid physical education but is restricted from participating in sports due to the diagnosis of Osgood-Schlatter disease.

Correct Answer: A

Rationale: The correct answer is that normally, the testes descend by one year of age. In young infants, it is common for the testes to retract into the inguinal canal when the environment is cold or the cremasteric reflex is stimulated. The exam should be done in a warm room with warm hands. It is most likely that both testes are present and will descend by a year. Option B is incorrect as not all cases of undescended testes require surgical intervention. Option C is incorrect because feeling only one testis does not necessarily mean the infant only has one testis. Option D is inaccurate as the testes do not normally descend by birth, but rather by one year of age. If the testes do not descend by one year, a full assessment will be needed to determine the appropriate treatment.

Correct Answer: C

Rationale: In Hindu culture, there is a strong sense of community and support. It is common for a patient to receive a large number of visitors, indicative of the community coming together to provide emotional and practical support. This support network is crucial for the patient's well-being and healing process. Option A, limited visitors, is incorrect as the Hindu culture values community involvement. Option B, family members only, is incorrect as the support network extends beyond just family. Option D, none of the above, is incorrect as the Hindu culture typically involves community support and a significant number of visitors.