Statement A is Correct
Infections caused by Gram-positive cocci do occur during the early period due to neutropenia in hematopoietic cell transplantation patients, making option A the correct answer.
Analysis of Each Statement
Statement A: Gram-positive cocci during early neutropenic period - TRUE
Gram-positive bacterial infections, particularly coagulase-negative Staphylococcus, are the predominant pathogens during the early post-transplant neutropenic phase. Coagulase-negative Staphylococcus accounts for 66% of gram-positive bacteremia cases during this period 1. The early period (pre-engraftment and first 30 days) is characterized by profound neutropenia and mucosal damage, which are the leading risk factors for these infections 2. Recent data confirms that 60% of bacterial bloodstream infection episodes occur by day +30, with gram-positive organisms being particularly common 3.
Statement B: HSV infection primarily >1 year post-transplant - FALSE
This statement is incorrect. HSV infections occur primarily during the early post-transplant period, not after one year. HSV reactivation is seen mostly during the pre-engraftment phase 2. Guidelines recommend acyclovir prophylaxis during phase I (the early period) for HSV-seropositive patients to prevent reactivation during the early posttransplantation period 4. Modern data shows that among breakthrough HSV infections, the median time from transplant to first positive test is 46 days, occurring well within the first 100 days 5. The incidence of breakthrough HSV during the first 100 days on prophylaxis is only 0.6%, demonstrating that with appropriate prophylaxis, early HSV is well-controlled and certainly not a late (>1 year) phenomenon 5.
Statement C: Systemic aspergillosis after first year post-engraftment - FALSE
This statement is incorrect. Invasive aspergillosis predominantly occurs in the post-engraftment period but well before one year, not after the first year. The timing of aspergillosis has shifted to the post-engraftment period (41-180 days after transplant), with risk factors including graft-versus-host disease, corticosteroid use, neutropenia, lymphopenia, CMV disease, and respiratory virus infections 6. While very late invasive aspergillosis (>6 months) can occur and is associated with chronic GVHD and CMV disease 6, the statement that it occurs "after the first year following graft engraftment" misrepresents the typical timing. The early post-engraftment phase (30-100 days) and the period up to 6 months are when most invasive fungal infections, including aspergillosis, occur 7.
Clinical Pitfalls to Avoid
- Do not assume HSV is a late complication - it requires prophylaxis during the early neutropenic period, not delayed surveillance
- Do not delay antifungal prophylaxis - aspergillosis risk peaks in the post-engraftment period during GVHD treatment, not in the late post-transplant period
- Recognize that gram-positive bacteremia during neutropenia is often catheter-related and associated with total parenteral nutrition use 1