Acute retinal necrosis in a neonate.

Purpose: To report an unusual case of dizygotic twins, in whom one neonate developed acute retinal necrosis from herpes simplex virus (HSV) type 2.

Methods: Retrospective chart review.

Results: A 29-week-old premature infant from in vitro fertilization donor egg with negative maternal and fetal history for HSV-1 and HSV-2 developed vesiculopapular rash upon birth.

Efficacy of high-efficiency particulate air filtration in preventing aspergillosis in immunocompromised patients with hematologic malignancies.

Objectives: To describe and investigate the cause of an outbreak of 10 cases of nosocomial invasive infection with Aspergillus flavus in a hematologic oncology patient care unit.

Design: A retrospective cohort study.

Setting: The hematologic oncology unit of a comprehensive cancer center.