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Infection in immunodepressed patients. The approach to diagnosis and treatment
Abstract:
Infection is an important cause of death in patients receiving cytostatic drugs or with any other impairment of host resistance. Such infections are frequently due to opportunist micro-organisms usually belonging to the endogenous flora of the patient. It is often difficult to obtain an exact diagnosis of the cause and localization of the infection. The problems associated with the prevention of infection are manifold. Exogenous infections can be prevented by proper isolation and a sterile diet. Endogenous infections can only be prevented by eradication of the patient's endogeous flora, so-called decontamination. Special attention should be given to treatment of foci of chronic infection and of the carrier state of certain microorganisms. However, the prophylactic use of antibiotics should be avoided. The curative use of antibiotics should be based on the most probable micro-organism. We consider the inventory of the patient's microflora, repeated weekly, of great help in the choice of antibiotics in cases of septicaemia of unknown aetiology. The initial therapy usually consists of a broad-spectrum combination of antibiotics, which should be bactericidal. When the causative bacteria have been isolated and the sensitivity is known, antibiotic therapy should be adjusted to the narrowest spectrum possible.
Insights
Patients with weakened immunity are at high risk for opportunistic infections. Identifying the specific pathogen and tailoring antibiotic therapy is crucial for effective treatment and preventing sepsis in immunocompromised individuals.
Area of Science:
- Infectious Diseases
- Oncology
- Microbiology
Background:
- Infections pose a significant mortality risk for patients undergoing cytostatic therapy or with compromised host resistance.
- Opportunistic infections, often caused by endogenous microflora, are common in these vulnerable populations.
- Accurate diagnosis of infection cause and location presents a considerable clinical challenge.
Purpose of the Study:
- To outline strategies for preventing and managing infections in immunocompromised patients.
- To emphasize the importance of accurate microbial diagnosis and targeted antibiotic therapy.
- To provide guidance on antibiotic selection for empirical and definitive treatment of infections.
Main Methods:
- Discusses strategies for preventing exogenous infections through isolation and sterile diets.
- Highlights the necessity of eradicating endogenous microflora (decontamination) for preventing endogenous infections.
- Emphasizes the importance of addressing chronic infection foci and microbial carrier states.
- Recommends weekly microflora inventory to guide antibiotic selection for sepsis of unknown origin.
Main Results:
- Initial antibiotic therapy for suspected infections should involve broad-spectrum, bactericidal combinations.
- Adjusting antibiotic therapy to the narrowest effective spectrum is crucial once causative agents and sensitivities are identified.
- Prophylactic antibiotic use should be avoided; curative use should be pathogen-directed.
Conclusions:
- Effective infection management in immunocompromised patients requires a multi-faceted approach, including prevention and precise therapeutic strategies.
- Understanding the patient's microflora is vital for optimizing antibiotic selection, particularly in cases of sepsis.
- Tailored, pathogen-specific antibiotic therapy, guided by sensitivity testing, improves patient outcomes.