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Updated: Jun 9, 2026

Detection of Invasive Pulmonary Aspergillosis in Haematological Malignancy Patients by using Lateral-flow Technology
Published on: March 22, 2012
Aspergillosis: nosocomial or community-acquired?
Marie-Christine Nicolle1, Thomas Benet, Philippe Vanhems
1Service d'Hygiène Hospitalière, Epidémiologie et Prévention, Hôpital Edouard Herriot, Hospices Civils de Lyon, 5 place d'Arsonval, Lyon, France.
Abstract:
Discrimination between nosocomial and community infections is important for investigation and prevention. Nosocomial and hospital-acquired infections require appropriate hospital control measures to avert additional cases. Nosocomial infections (NI) occur during hospitalization or are caused by microorganisms acquired during hospital stay. Such infections should not be evident when patients are admitted to the hospital. Furthermore, the definition of NI is based on epidemiological criteria, such as the time lapse between admission and onset, or microbiological criteria. This definition might be difficult to apply to invasive aspergillosis (IA) which often afflicts patients with severe immunosuppression or transplantation. Identification of the source may be difficult which could arise outside or inside the hospital. Another significant issue is the lack of valid and reproducible data on the incubation period. The incubation duration of IA is influenced by different individual or environmental determinants, including the severity of immunosuppression and air quality. The criteria of causality are also a means of discussing the contribution of hospital vs. community determinants of IA. The definition of nosocomial IA remains difficult. A better understanding of early events related to IA onset will help to prevent this disease for which the prognosis remains negative.
Insights
Distinguishing hospital-acquired infections from community infections is crucial for prevention. This study highlights challenges in defining nosocomial invasive aspergillosis, impacting patient outcomes.
Area of Science:
- Infectious Diseases
- Hospital Epidemiology
- Mycology
Background:
- Differentiating nosocomial infections (NI) from community-acquired infections is vital for effective control strategies.
- Nosocomial infections are acquired during hospitalization and require specific hospital-based interventions.
- Accurate classification of infections aids in targeted prevention and treatment protocols.
Purpose of the Study:
- To explore the difficulties in defining and diagnosing nosocomial invasive aspergillosis (IA).
- To examine the challenges posed by IA's variable incubation period and potential sources.
- To discuss the contribution of hospital versus community factors in IA development.
Main Methods:
- Review of epidemiological and microbiological criteria for defining nosocomial infections.
- Analysis of factors influencing invasive aspergillosis incubation periods.
- Discussion of causality criteria for hospital-acquired versus community-acquired determinants.
Main Results:
- Standard definitions of NI are challenging to apply to invasive aspergillosis (IA).
- Identifying the source of IA (hospital vs. community) is often difficult.
- Lack of consistent data on IA incubation periods complicates diagnosis and attribution.
Conclusions:
- Defining nosocomial invasive aspergillosis presents significant challenges.
- Understanding early IA events is critical for developing effective prevention strategies.
- Improved diagnostic and epidemiological approaches are needed for IA management.
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