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Influence of Some Growth Conditions on The Antibacterial Activities of Lactobacillus fermentum Against Human Fecal Staphylococcus aureus Nguyễn Anh, Dũng
International Journal of Applied Biology Vol. 7 No. 2 (2023): International Journal of Applied Biology
Publisher : Hasanuddin University

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Abstract

One of the best-known and widespread bacterial pathogens that cause invasive infections as well as skin infections is recognized as Staphylococcus aureus strains to contribute to certain pneumonia and other respiratory tract infections, cardiovascular infections, infections at surgical sites, infections of prosthetic joints, and nosocomial bacteremia. Meanwhile, Lactic acid bacteria (LAB) have an effective antibacterial potential that may be used to safeguard both human and animal health, according to several research. Numerous LAB strains are side effect free and incapable of harming both people and lab animals. Hence, this study was performed to investigate the optimal conditions including MipH, InTe, and InTi for Lactobacillus fermentum (LAF) isolated from traditional fermented foods against human fecal Staphylococcus aureus (hf-SA).
Studying on Antifungal Activities of Streptomyces Isolated from Soil and Its Biocontrol Potential Against Fusarium of Chili’s Root Rot Disease Nguyễn Anh, Dũng
International Journal of Applied Biology Vol. 8 No. 1 (2024): International Journal of Applied Biology
Publisher : Hasanuddin University

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Abstract

Seven Streptomyces strains from chili farm soil, including Strep-1, Strep-2, Strep-4, Strep-5, Strep-6, Strep-8, and Strep-10, were screened for their antifungal activities against Fusarium sp. of chili's root rot disease. The results showed that Streptomyces sp. Strep-4 and Streptomyces sp. Strep-8 performed potential abilities to control the pathogenic Fusarium of which means of antifungal efficacies were 43,88 ± 3,21% and 51,8 ± 2,54%, in turn. Extensive researches on the effects of inoculum factors on antifungal activity of Streptomyces sp. Strep-8 resulted that this strain spontaneously synthesized the antifungal compounds to control Fusarium in the culture condition with pH 7, 40oC of culture temperature, and 7 days of culture time. The results proved that Streptomyces sp. Strep-8 with its thermophilic ability not only provided significant inhibitory activity against pathogenic Fusarium sp. in vitro also promised to be a potential biological control agent to eliminate this fungus on fields. Moreover, using Streptomyces sp. Strep-8 as a biological control agent helps reduce the use of fungicides which contributes to boosting the sustainability of agricultural ecosystems worldwide.