In Vitro Activities of Amphotericin-b in Combination with Rifampin against Aspergillus Species
نویسندگان
چکیده
Objective: The main goal of study was finding the synergism effect of amphotricin B (AMB) and rifampin (RIF) on 3 species of Aspergillus. Methodology: Activities of amphotericin B in combination with rifampin were tested in buffered yeast-nitrogen base using checkerboard method. Plates were inoculated with 20μl spores suspensions of each organism and incubated at 30°C for 24h. For this method, the MICs were defined as the lowest antimicrobial concentration inhibiting visible fungal growth on the plates. Minimal fungicidal concentration was defined as the first tube showing no growth on the plate. Results: The MIC of amphotericin B for 100% of isolates of A. fumigatus and A. flavus were inhibited by 4mg/lit amphotericin B. 100% of isolates of A. niger were inhibited by 8mg/lit amphotericin B. When amphotericin B was combined with rifampin, amphotericin B MICs decreased to 2, 1 and 4mg/lit in A. fumigatus, A. flavus rephrase and A. niger respectively. Conclusion: The results indicate that combination of amphotreicin B and rifampin was synergistic on A. fumigatus, A. flavus and A. niger.
منابع مشابه
Activity of amphotericin B, 5-fluorocytosine, and rifampin against six clinical isolates of Aspergillus.
Amphotericin B in combination with 5-fluorocytosine was synergistic against three clinical isolates of Aspergillus fumigatus and one of three clinical isolates of A. flavus. Amphotericin B in combination with rifampin was synergistic against all six clinical isolates of Aspergillus tested. The levels of 5-fluorocytosine and rifampin required for synergism were higher than clinically achievable ...
متن کاملA Review of Antifungals and their Mono- and Combination- therapy in the Treatment of Invasive Fungal Infections
Invasive fungal infections with high mortality rate are a growing health concern in hospitals and medical centers. The infection usually occurs in people with compromised immune systems. The purpose of this paper is a review of the most commonly prescribed antifungal drugs for invasive fungal diseases. Antifungals consist of the four main groups; polyenes, azoles, echinocandins and DNA an...
متن کاملIn vitro activity of the new triazole voriconazole (UK-109,496) against opportunistic filamentous and dimorphic fungi and common and emerging yeast pathogens.
The in vitro antifungal activity of a new triazole derivative, voriconazole, was compared with those of itraconazole and amphotericin B against 67 isolates of Aspergillus flavus, Aspergillus fumigatus, Bipolaris spp., Fusarium oxysporum, Fusarium solani, Pseudallescheria boydii, Rhizopus arrhizus, Blastomyces dermatitidis, Histoplasma capsulatum, and Sporothrix schenckii. The in vitro activitie...
متن کاملSynergistic action of amphotericin B and rifampin against Rhizopus species.
A 16-year-old diabetic patient developed Rhizopus pneumonia and was initially treated with amphotericin B for 7 days. Because of clinical deterioration of the patient, rifampin was added empirically. The patient improved clinically, and lung tissue removed surgically 8 weeks later showed no fungal elements by histopathological studies or by culture. An in vitro study of amphotericin B alone and...
متن کاملAmphotericin B- and voriconazole-echinocandin combinations against Aspergillus spp.: Effect of serum on inhibitory and fungicidal interactions.
Antifungal combination therapy with voriconazole or amphotericin B and an echinocandin is often employed as primary or salvage therapy for management particularly of refractory aspergillosis. The pharmacodynamic interactions of amphotericin B- and voriconazole-based combinations with the three echinocandins caspofungin, micafungin, and anidulafungin in the presence of serum were tested against ...
متن کامل