A pneumonia that occurs 48 hours or more after admission to the hospital is considered:

Hospital-acquired pneumonia

Immunocompromised pneumonia

Community-acquired pneumonia

Viral pneumonia

Answer and Explanation

The Correct Answer is A

A. Hospital-acquired pneumonia: Pneumonia that develops 48 hours or more after hospital admission is classified as hospital-acquired pneumonia (HAP). It is caused by pathogens acquired in the hospital setting, often involving multidrug-resistant organisms such as Pseudomonas aeruginosa, Staphylococcus aureus (including MRSA), and Klebsiella pneumoniae. Patients who are intubated, have prolonged hospital stays, or have weakened immune defenses are at higher risk.

B. Immunocompromised pneumonia: Pneumonia in immunocompromised patients occurs due to weakened host defenses, such as in individuals with HIV/AIDS, those undergoing chemotherapy, or transplant recipients on immunosuppressive therapy. While these patients can develop HAP, pneumonia due to opportunistic infections like Pneumocystis jirovecii or fungal infections is categorized separately.

C. Community-acquired pneumonia: Pneumonia acquired outside the hospital or within the first 48 hours of admission is classified as community-acquired pneumonia (CAP). Typical pathogens include Streptococcus pneumoniae, Haemophilus influenzae, and Mycoplasma pneumoniae. CAP is usually less resistant to antibiotics compared to HAP.

D. Viral pneumonia: Pneumonia caused by viral pathogens such as influenza, respiratory syncytial virus (RSV), or SARS-CoV-2 is classified based on the causative agent rather than the setting in which it was acquired. Although viruses can cause both CAP and HAP, the classification of pneumonia is determined by the timing of onset and exposure risks.

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Correct Answer is B

Explanation

A. Septal: Septal cardiomyopathy typically refers to abnormalities in the interventricular septum and does not specifically address the rigidity and noncompliance of the myocardium that affects diastolic filling.

B. Restrictive: Restrictive cardiomyopathy is characterized by a rigid and noncompliant myocardium that impedes ventricular filling during diastole. This results in elevated pressures in the ventricles and may lead to heart failure symptoms due to poor filling capacity.

C. Infiltrative: Infiltrative cardiomyopathy involves the deposition of abnormal substances (such as amyloid or sarcoid) within the myocardial tissue, which can lead to stiffness. While this may contribute to restrictive physiology, "restrictive" is the more precise term for the condition described.

D. Hypertrophic: Hypertrophic cardiomyopathy is characterized by an abnormal thickening of the heart muscle, particularly the left ventricle. While this condition can affect diastolic filling, it is primarily due to muscle hypertrophy rather than rigidity and noncompliance of the myocardium.

A. Fungus B. Virus C. Bacterium D. Ricksettsiae

Correct Answer is C

Explanation

A. Fungus: While fungal infections can cause infective endocarditis, they are much less common compared to bacterial infections. Fungal endocarditis typically occurs in immunocompromised individuals or those with specific risk factors.

B. Virus: Viral infections can affect the heart, but they are not a common cause of infective endocarditis. Most cases of endocarditis are associated with bacterial infections rather than viral ones.

C. Bacterium: The most common cause of infective endocarditis is bacterial infection. Bacteria, particularly Staphylococcus aureus, Streptococcus viridans, and Enterococcus, are frequently implicated in this condition. These bacteria can enter the bloodstream and adhere to heart valves or damaged cardiac tissue, leading to infection and inflammation.

D. Rickettsiae: Rickettsial infections are caused by a specific type of bacteria that are typically transmitted through arthropod vectors, such as ticks. While they can cause various illnesses, they are not a common cause of infective endocarditis.

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A pneumonia that occurs 48 hours or more after admission to the hospital is considered:

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Naxlex Comprehensive Predictor Exams

Myocardium is rigid and noncompliant, impeding ventricular filling and raising pressures during diastole is which form of cardiomyopathy?

Correct Answer is B

Explanation

What is the common cause of infective carditis?

Correct Answer is C

Explanation

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