Sangeetha, B A and Shobana, CS and Abirami, B and Suresh, S (2020) Evaluation of in vitro activities of extracellular enzymes from Aspergillus species isolated from corneal ulcer/keratitis. Saudi Journal of Biological Sciences, 27. pp. 701-705. ISSN 1319-562X

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Abstract

Mycotic/fungal keratitis is a suppurative, generally ulcerative infection of the cornea. The filamentous fungi, Aspergillus spp. are the second leading cause of mycotic keratitis, particularly in India. Aspergillus spp. produce a range of extracellular enzymes that are used to break down complex molecules and used for growth and reproduction, also for survival on/in host organism. The current study was designed with an objective to screen in vitro extracellular enzyme activity of Fusarium and Aspergillus isolates from
mycotic keratitis patients and to correlate the same as a putative virulence factor. Extracellular enzymes viz., deoxyribonuclease (DNase), protease, lipase, elastase, keratinase, etc., produced by Aspergillus have key role in keratomycosis and hence their (n = 85) in vitro activities were investigated. It was found that, the majority of the Aspergillus isolates produced protease (n = 75; 88% of 85) followed by lipase (n = 59; 69% of 85), DNase (n = 35; 41% of 85), elastase (n = 26; 31% of 85) and keratinase (n = 13; 15% of 85). The enzyme activity indices (EAI) for DNase, elastase, protease and lipase ranged between 1.01 and 1.98,
whereas elastase EAI varied between 1.26 and 1.92. DNase, protease and lipase showed a maximum EAI of 1.98 and lowest EAI value of 1.01, respectively. Extracellular enzymes of Aspergillus spp. may have potential role in the onset and progression of keratitis.

Item Type: Article
Uncontrolled Keywords: Mycotic keratitis Aspergillus Extracellular enzyme activity Virulence Corneal ulcer Eye infections
Divisions: PSG College of Arts and Science > Department of Microbiology
Depositing User: Mr Team Mosys
Date Deposited: 06 Jul 2022 08:46
Last Modified: 06 Jul 2022 08:46
URI: http://ir.psgcas.ac.in/id/eprint/1276

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