Which child does not need Pneumocystis carinii pneumonia (PCP) prophylaxis?

Which child does not need Pneumocystis carinii pneumonia (PCP) prophylaxis?

• A. An HIV-exposed newborn
• B. A HIV-positive infant with a CD4 count of 1600 (no immune suppression)
• C. A 3-year-old HIV-positive child with a CD4 count of 1000 (no immune suppression) and a history of PCP
• D. A 3-year-old HIV-positive child with a CD4 count of 600 (moderate immune suppression)

Answer: (D)

The key idea here is that PCP prophylaxis is targeted to those with significant immune compromise or a prior PCP history. In pediatric patients, you start prophylaxis when the CD4 count falls below a threshold (and/or the CD4 percentage drops) or when there has been a previous PCP event; otherwise, prophylaxis is not needed. An HIV-exposed newborn who is not infected is not immunosuppressed and does not require PCP prophylaxis. An HIV-positive infant with a high CD4 count and no immune suppression likewise does not need prophylaxis. If there is a history of PCP, prophylaxis is indicated to prevent recurrence. A child with moderate immune suppression would typically be considered at risk and would be a candidate for prophylaxis as well. So, by standard practice, the child who does not need PCP prophylaxis is the HIV-exposed newborn who is not infected (and, separately, the HIV-positive infant with a normal/high CD4 count).

The key idea here is that PCP prophylaxis is targeted to those with significant immune compromise or a prior PCP history. In pediatric patients, you start prophylaxis when the CD4 count falls below a threshold (and/or the CD4 percentage drops) or when there has been a previous PCP event; otherwise, prophylaxis is not needed.

An HIV-exposed newborn who is not infected is not immunosuppressed and does not require PCP prophylaxis. An HIV-positive infant with a high CD4 count and no immune suppression likewise does not need prophylaxis. If there is a history of PCP, prophylaxis is indicated to prevent recurrence. A child with moderate immune suppression would typically be considered at risk and would be a candidate for prophylaxis as well.

So, by standard practice, the child who does not need PCP prophylaxis is the HIV-exposed newborn who is not infected (and, separately, the HIV-positive infant with a normal/high CD4 count).