Pneumonia in transplant patients on immunosuppressants is most commonly caused by which organism?

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Multiple Choice

Pneumonia in transplant patients on immunosuppressants is most commonly caused by which organism?

In transplant patients on immunosuppressants, infections that take advantage of weakened cell-mediated immunity are most common, and cytomegalovirus often sits at the top of that list. CMV, a latent herpesvirus, frequently reactivates when the immune system is suppressed and can cause pneumonitis with cough, fever, dyspnea, and hypoxemia. Prophylaxis and targeted antiviral treatment are important because CMV pneumonia can be a serious complication in this population. The other organisms can cause pneumonia, but they’re not the leading opportunistic pathogens in this setting: Mycoplasma tends to cause atypical pneumonia but isn’t specifically tied to transplant-related immunosuppression as the most common cause; RSV can affect adults too but is less commonly the primary cause of pneumonia in adult transplant recipients; Klebsiella is a bacterial pathogen often linked to hospital-acquired infections rather than the typical opportunistic viral pneumonia seen in immunosuppressed transplant patients.

In transplant patients on immunosuppressants, infections that take advantage of weakened cell-mediated immunity are most common, and cytomegalovirus often sits at the top of that list. CMV, a latent herpesvirus, frequently reactivates when the immune system is suppressed and can cause pneumonitis with cough, fever, dyspnea, and hypoxemia. Prophylaxis and targeted antiviral treatment are important because CMV pneumonia can be a serious complication in this population.

The other organisms can cause pneumonia, but they’re not the leading opportunistic pathogens in this setting: Mycoplasma tends to cause atypical pneumonia but isn’t specifically tied to transplant-related immunosuppression as the most common cause; RSV can affect adults too but is less commonly the primary cause of pneumonia in adult transplant recipients; Klebsiella is a bacterial pathogen often linked to hospital-acquired infections rather than the typical opportunistic viral pneumonia seen in immunosuppressed transplant patients.

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