Studies on antimicrobial activities of endophytic bacteria isolated from Neem tree (Azadirachta indica)

Duong Nhat Linh (), Bui Van Thien, Tran Thi Ai Ni, Nguyen Thanh Duy, Nguyen Van Minh and Tran Cat Dong
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Duong Nhat Linh: Ho Chi MinhCity Open University, Vietnam
Bui Van Thien: Ho Chi Minh City Open University, Vietnam
Tran Thi Ai Ni: Midoli Co., ltd, Vietnam
Nguyen Thanh Duy: University of San Francisco, USA, Vietnam
Nguyen Van Minh: Ho Chi Minh City Open University, Vietnam
Tran Cat Dong: University of Medicine and Pharmacy at Ho Chi Minh City, Vietnam

HO CHI MINH CITY OPEN UNIVERSITY JOURNAL OF SCIENCE - ENGINEERING AND TECHNOLOGY, 2020, vol. 10, issue 1, 72-80

Abstract: The objective of this study is to isolate endophytic bacteria from Azadirachta indica (neem). We isolated 7 strains of endogenous bacteria from the neem tree. By investing the anti-fungal and antibacterial activities of endophytic bacteria in A. indica by well diffusion agar method, we noticed there was KT2 strain which resisted to Salmonella typhi and Staphylococcus aureus (10.67 ± 0.33 mm and 9.67 ± 0.33 mm), KT3 strain showed the inhibitory activity to three human pathogenic fungal (Candida albicans, Trichophyton mentagrophytes, Trichophyton rubrum), two strains (KT1, KT2) which resisted to C. albicans and T. rubrum. According to Cowan and Steel's manual, the result of biochemical identification showed that the KT2 strain was the Bacillus subtilis species.

Keywords: Azadirachta indica A. Juss; bacillus subtilis; Candida albicans; endophytic bacteria; trichophyton rubrum (search for similar items in EconPapers)
Date: 2020
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Persistent link: https://EconPapers.repec.org/RePEc:bjw:techen:v:10:y:2020:i:1:p:72-80

DOI: 10.46223/HCMCOUJS.tech.en.10.1.362.2020

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