Related Experiment Videos
[Preventive measures for the control of fungal infections in the clinic]
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 (endomycoses). 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.(ABSTRACT TRUNCATED AT 250 WORDS)
Insights
Hospital-acquired fungal infections, mainly Candida and Aspergillus, are linked to weakened immune systems and chemotherapy. Prevention involves patient surveillance, local decontamination, and strict environmental controls, especially for catheters.
Area of Science:
- Medical Mycology
- Infectious Diseases
- Hospital Epidemiology
Background:
- Hospital-acquired fungal infections are a significant concern, primarily caused by Candida and Aspergillus species.
- Patients with compromised immune systems or undergoing aggressive chemotherapy are at high risk for secondary fungal infections.
- Fungal pathogens can originate from endogenous flora (Candida) or exogenous sources (Aspergillus, Candida).
Purpose of the Study:
- To review the primary fungal pathogens responsible for hospital-acquired infections.
- To outline the risk factors and routes of transmission for Candida and Aspergillus.
- To discuss preventive and control strategies for hospital-acquired fungal infections.
Main Methods:
- Literature review of fungal infections in hospital settings.
- Analysis of transmission routes and risk factors.
- Summary of current preventive and therapeutic measures.
Main Results:
- Candida species often originate from the patient's own microbiota, while Aspergillus species are typically acquired exogenously.
- Infections can manifest as superficial or invasive (endomycoses).
- Environmental contamination and healthcare worker practices play a role in transmission.
Conclusions:
- Effective prevention requires continuous patient surveillance and early detection of infections.
- Selective decontamination using agents like nystatin, amphotericin B, or ketoconazole can reduce fungal burden.
- Meticulous catheter management and environmental disinfection are crucial for controlling fungal spread.