Journal of Pure and Applied MicrobiologyVol. 9 No. Special Edition May. 2015

Phenotype and Genotype Identification of Fungal Isolates in Otomycosis Patients with Emphasis on their Enzymatic Activity

Mohammed S. Alhussaini1*, Noha F. El-Tahtawi2 and Mohammed I. Alghonaim3

1Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, Shaqra University, Saudi Arabia. 2Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, Al-Dawadmi, Shaqra University, Saudi Arabia. 3Department of Biology, College of Science and humanities, Al-Quway’iyah Shaqra University, Saudi Arabia.

Received on 19 Feburary 2015 and accepted on 15 April 2015

 

ABSTRACT

Detection of the fungal causative agents in the external auditory canal could be valuable to determine the potential risk of the disease. The aim of the present study was to isolate and identify the mycoflora of the human auditory canal in sampled patients of Saudi Arabia with emphasis on their enzymatic activity. A total number of 150 patients were clinically examined for the presence of mycotic otitis in Al-Dawadmi governorate (Saudi Arabia). The clinical samples were cultured on Sabouraud dextrose agar media. Fungal isolates were then identified using phenotypic and genotypic techniques. The enzymatic activities of some fungal isolates were also detected. Eighty six fungal isolates were recovered in this study. These isolates included sixteen fungal species belonging to eight genera. Aspergillus spp. were recorded in sixty one cases (70.93%), Penicillium (19.76%), Candida (2.3%) and Fusarium (2.3%). The disease was more prevalent among 21-30 years old (46.51%). Pruritus was the most common symptom. Extracellular proteolytic and lipolytic enzymes were produced by (90.9 %) and (75.75%) of the fungal isolates respectively. Hydrolytic enzymes that are considered the most important factors influencing virulence and pathogenicity of opportunistic fungal infections were detected in most of the fungal cultures tested herein.

Keywords : Hydrolytic enzymes, ear, Aspergillus, Penicillium, Fusarium