Related Experiment Videos
[Prevention of fungal infections in hospitalized patients]
Abstract:
Hospital acquired infections due to fungi are primarily caused by yeast species of the genus Candida and mould species of the genus Aspergillus. Underlying disease with severely impaired defence mechanisms as well as certain forms of immunosuppressive and aggressive chemotherapy are the most important prerequisites for such secondary fungal infections. Aspergillus spec. usually infect man via exogenous routes, whereas Candida spec. mostly originate from the patient's own microbial flora. Under certain circumstances invasion of tissues follows (endomycosis). Exogenous Candida infections may likewise occur through contaminated hands of personnel and medical devices. The density of yeast cell distribution in hospital wards decreases with the distance from the primary source: the Candida infected human patient. Preventive measures protecting the patient at risk include: Permanent surveillance by routine cultural and serological examinations for the detection of an early infection of the skin, mouth, oesophagus, urinary tract, vagina and the bowel. Monitoring of patients is essential for early detection of dissemination and contributes to the control of fungal decontamination measures. Selective local decontamination is effected by the use of nonabsorbable compounds such as nystatin and amphotericin B in the gastrointestinal tract, and in oral and genital mucous membranes. Oral administration of ketoconazole has also been recommended. For the disinfection of skin appropriate chemicals are available. In the control of the environment of the endangered patient special attention must be paid to meticulous management of catheters. These measures are to be supported by careful disinfection policy concerning the hands of personnel and medical equipment.(ABSTRACT TRUNCATED AT 250 WORDS)
Insights
Hospital-acquired fungal infections, mainly from Candida and Aspergillus, pose risks to immunocompromised patients. Prevention involves surveillance, decontamination, and strict hygiene protocols for patients and staff.
Area of Science:
- Medical Mycology
- Infectious Diseases
- Hospital Epidemiology
Context:
- Hospital-acquired fungal infections are a significant concern, primarily caused by Candida and Aspergillus species.
- Patients with compromised immune systems and those undergoing aggressive chemotherapy are particularly vulnerable.
- Fungal infections can arise from endogenous sources (Candida) or exogenous routes (Aspergillus, contaminated medical devices).
Purpose:
- To outline the primary fungal pathogens responsible for hospital-acquired infections.
- To identify key risk factors and modes of transmission for these infections.
- To detail essential preventive and control strategies.
Summary:
- Candida species often originate from the patient's own flora, while Aspergillus species are typically acquired exogenously.
- Infections can manifest as superficial or invasive (endomycosis), with transmission occurring via personnel, medical devices, or environmental contamination.
- Key preventive measures include continuous patient surveillance (cultural and serological exams), selective decontamination (e.g., nystatin, amphotericin B), and stringent environmental and personnel hygiene.
Impact:
- Highlights the importance of early detection and monitoring for effective management of fungal infections.
- Emphasizes the role of selective decontamination and environmental controls in reducing fungal transmission.
- Underscores the need for comprehensive infection control strategies involving patient care, staff practices, and medical equipment management.