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Biomedical subjects

Elizabeth S Dodds Ashley

Publications and source records attributed to Elizabeth S Dodds Ashley.

6 recordsLinked to original sources

Caspofungin for invasive candidiasis at a tertiary care medical center.

BACKGROUND: Caspofungin is emerging as first-line therapy for invasive candidiasis. Data on the use of caspofungin for treatment for invasive candidiasis are limited to clinical trials and case reports. We report a single-center experience with 104 consecutive courses of caspofungin for the treatment of invasive candidiasis to evaluate a real-world performance of this drug. METHODS: A retrospective chart review of patients receiving caspofungin at a tertiary care medical center was performed. Patient information and microbiologic data were abstracted from patient charts and electronic medical records. RESULTS: Of 241 patients receiving caspofungin for all indications, 122 (51%) had proven invasive candidiasis. There were 104 treatment courses for candidiasis in 99 patients available for review. Bloodstream (66%) and abdominal infections (25%) were the most common sites of infection. Most infections were non-albicans (80/104, 77%; including patients infected with more than one species). Clinical cure rates at the end of therapy were 83% (57/69) for bloodstream infections and 84% (22/26) for abdominal infections. Caspofungin did not clear candidiasis in 14 episodes (microbiologic cure rate 75%, 42/56). CONCLUSIONS: The clinical use of caspofungin has been successful in the treatment of invasive candidiasis, even in patients with prior antifungal exposure. In this unselected review, caspofungin performed similarly as in clinical trials, and clinicians should consider caspofungin as first-line therapy for invasive candidiasis, particularly non-albicans species.

Antifungal Agents↗

Treatment options for invasive fungal infections.

Clinicians face an increasing occurrence of invasive fungal infections. These are due not only to traditional yeast and mould species but also to rare pathogens that can be difficult to treat. The introduction of new agents has expanded the options for treating common and rare mycotic infections with antifungal efficacy at least equal, and safety far superior, to that of a once-limited choice of therapies. Patients with invasive mycoses frequently have concomitant disorders and require multidrug regimens. Clinicians must be aware of the potential for interactions among agents available for treating invasive mycoses in patients with serious underlying conditions.

Amphotericin B↗

Posaconazole.

Invasive fungal infections are occurring with increasing frequency secondary to medical advances in the areas of transplantation, cancer management and autoimmune diseases. Unfortunately, the currently available antifungal armamentarium does not meet the increasing needs of managing infection in these complex patient populations. Posaconazole, a new triazole antifungal agent, is being investigated for its role in treating serious infections due to yeasts and molds. This new drug offers an expanded spectrum of activity over other members of its class. In addition to potent activity against fluconazole-resistant Candida and refractory cases of aspergillosis, posaconazole demonstrates activity against Zygomycetes. Posaconazole is a well-tolerated agent that offers a diminished toxicity profile compared with other currently marketed systemic antifungal agents. Clinical success rates thus far have been promising, although the exact role of this agent in treating and preventing invasive fungal infections is yet to be determined.

Antifungal Agents↗

Recent advances in antifungal pharmacotherapy for invasive fungal infections.

Invasive fungal infections carry significant morbidity and mortality. Candida species have become one of the most frequent causes of bloodstream infections, and infections caused by molds such as Aspergillus are becoming more frequent in immunocompromised patients. As this population grows, more invasive fungal infections can be anticipated. In the past, treatment options have been limited for many of these infections due to toxicity and efficacy concerns with the available antifungals. Fortunately, the past few years have brought exciting developments in antifungal pharmacotherapy. Lipid-based formulations of amphotericin B were introduced in the 1990s to attenuate adverse effects caused by amphotericin B deoxycholate (Fungizone, Bristol-Myers Squibb). Most recently, the echinocandins have been added to our antifungal regimen with the introduction of caspofungin (Cancidas, Merck and Co.) and voriconazole (Vfend, Pfizer), a new triazole, has come to market. The introduction of the echinocandins has invigorated the discussion about combination antifungal therapy. Evidence-based studies using these new agents are accumulating, and they are assuming important roles in the pharmacotherapy of invasive fungal infections in seriously ill and complex patients.

Amphotericin B↗

Antifungal pharmacotherapy for invasive mould infections.

The incidence of invasive mould infections is increasing and is associated with significant morbidity and mortality. Among the most prevalent of these infections are those caused by Aspergillus and Fusarium species. Invasive disease caused by moulds frequently presents as a pulmonary infection, but haematogenous infection can occur. Some moulds cause cutaneous disease through either direct inoculation of the skin or secondary spread to the skin after dissemination from another body site. Early diagnosis can often be difficult and, unfortunately, diagnosis occurs late in the course of illness in many cases. Treatment options have historically been limited by the need for intravenous administration (amphotericin B), significant toxicities (amphotericin B), lack of reliable in vitro activity (e.g., amphotericin B in Fusarium and Scedosporium apiospermum infections) and relative lack of clinical experience with newer agents. The recent approval of voriconazole (Vfend, Pfizer) introduces a treatment option that demonstrates both in vitro and in vivo activity against a variety of moulds. With the recent development of the new echinocandin class of antifungal agents and newer broad-spectrum azole antifungal agents with in vitro mould activity, there is a renewed emphasis on fungal treatment strategies. Antimould therapy presents challenges in adverse effect avoidance and management, drug interactions and pharmacoeconomic considerations. Furthermore, combination therapy is being explored with these various new antifungal agents. The administration of an optimal fungicidal therapy early in the course of the illness and control of the underlying disease are vital to prevent complications and mortality from these tenacious mycoses.

Antifungal Agents↗