Invasive aspergillosis outbreak on a hematology-oncology ward

An outbreak of invasive aspergillosis occurred in a community hospital in temporal association with construction activity. Epidemiological investigation showed that patients who are at highest risk comprise a small group and are readily identifiable. Clinicians should strive to protect these patients, following guidelines published by the Centers for Disease Control and Prevention (Infect Control Hosp Epidemiol 2001;22:45-48).