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Published on: February 14, 2018
Lamisil, a potent alternative antifungal drug for otomycosis
A Zarei Mahmoudabadi1,2, Z Seifi3, M Gharaghani1
1Department of Medical Mycology, School of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
Background And Purpose:
Otomycosis is an acute, subacute or chronic fungal infection of the pinna, the external auditory meatus and the ear canal caused mainly by several species of saprophytic fungi. Lamisil (Terbinafine) is an allylamine antifungal agent, that is used both in the topical and oral administration for the treatment of dermatophytosis, cutaneous candidiasis, and the pityriasis versicolor. We investigated the in vitro activity of clotrimazole, miconazole, nystatin, and Lamisil against the agents of otomycosis.
Materials And Methods:
Fifteen clinically obtained isolates from otomycosis (Aspergillus species; n=13, and Candida species, n=2) and 8 environmental isolates of Aspergillus were tested. The disk diffusion method was employed to detect susceptibility. In the present study, the in vitro activity of the terbinafine with clotrimazole, miconazole, and nystatin against several isolates of Aspergillus and Candida with different sources were compared.
Results:
Out of 23 isolates of Aspergillus, Candida 4(17.4%) and 1(4.4%) were resistant to nystatin and miconazole, respectively. In addition, all tested organisms were sensitive to clotrimazole and terbinafine. Statistical analysis has shown that there are no significant differences on the effects of clotrimazole, miconazole and, terbinafine on saprophytic (environmental) and pathogenic isolates of A. niger, A. flavus, and A. terreus (P value= 0.85). In addition, all tested organisms were found to be highly susceptible to terbinafine (P< 0.04).
Conclusion:
This is a new approach for the possible use of Lamisil for the treatment of otomycosis.
Insights
Terbinafine (Lamisil) and clotrimazole demonstrated potent in vitro activity against common otomycosis pathogens, including Aspergillus and Candida species. All tested organisms were sensitive to terbinafine, suggesting its potential as a novel treatment for fungal ear infections.
Area of Science:
- Mycology
- Dermatology
- Infectious Diseases
Background:
- Otomycosis is a fungal infection affecting the ear canal, commonly caused by Aspergillus and Candida species.
- Established antifungal agents like clotrimazole, miconazole, and nystatin are used, but resistance can occur.
- Lamisil (Terbinafine) is an allylamine antifungal with known efficacy against various fungal infections.
Purpose of the Study:
- To evaluate the in vitro antifungal activity of Terbinafine (Lamisil) against clinical and environmental isolates of otomycosis pathogens.
- To compare the efficacy of Terbinafine with established antifungals: clotrimazole, miconazole, and nystatin.
Main Methods:
- Disk diffusion method was used to assess the susceptibility of 15 clinical and 8 environmental fungal isolates (Aspergillus and Candida species).
- In vitro activity of Terbinafine, clotrimazole, miconazole, and nystatin was tested against these isolates.
- Statistical analysis was performed to compare the effects of the antifungals on different isolates.
Main Results:
- All tested fungal isolates, including Aspergillus and Candida species, were sensitive to clotrimazole and Terbinafine.
- Nystatin showed resistance in 17.4% of isolates, and miconazole in 4.4%.
- Terbinafine demonstrated high susceptibility across all tested organisms (P<0.04), with no significant difference in efficacy between environmental and pathogenic isolates.
Conclusions:
- Terbinafine exhibits significant in vitro activity against the primary causative agents of otomycosis.
- This study suggests a potential new therapeutic approach using Lamisil (Terbinafine) for treating otomycosis.
- Clotrimazole also showed broad-spectrum efficacy against the tested fungal isolates.
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