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Vol.10 No.1 – 5: Investigate the impact of probiotics of lactic acid bacteria obtained from various local sources on some pathogenic bacteria.

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Hasanain Qasim Mezaal Al-kaabi1, Rahman Laibi Chelab1

1 Department of Biology, College of Education for Pure Sciences, University of Thi-Qar, 64001, Iraq.

ABSTRACT

Probiotics play a crucial role in fighting infectious diseases by significantly impacting their control. They possess the capacity to lower the frequency of contagious illnesses, potentially lessening the dependence on antibiotics and helping to alleviate the development of bacteria that are resistant to various medications. Besides, they hold substantial importance in the realm of food. The objective of this research was to isolate various strains of lactic acid bacteria (LAB) from diverse sources and explore their capabilities in laboratory settings. The efficacy of probiotic strains against some harmful bacteria was assessed through both the agar diffusion method and the agar spot method. Additionally, their resilience under conditions resembling the stomach and intestinal environment, their capacity for auto-aggregation, and antibiofilm were also examined. Our findings suggest that the isolated strains displayed differing levels of probiotic effectiveness, with the HR3 strain, identified as Lactiplantibacillus plantarum, demonstrating notable excellence in this regard.

Investigate the impact of probiotics of lactic acid bacteria obtained from various local sources on some pathogenic bacteria

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Vol.2 No.08 -7 : Potential role of probiotic bacteria as antioxidants agent.

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By : Mostafa El-Sheekh1, Nanis G. Allam1, Naglaa Ibrahim Sarhan2 and Ghada Alfakharany1

Abstract

Oxidants are free radicals that find in the environment, but they are also produced naturally in our body. Antioxidants have an important role in the body health and protected from many diseases caused by free radicals. The unique characters of probiotic bacteria make it used extensively in the field of medicine antioxidant, anticancer, anti-microbial, anti-diabetic, anti-inflammatory properties and hepatoprotective agent. This study was designed to explore the influence of lactic acid bacteria as antioxidative agents. Antioxidative properties for all tested stains were investigated through determination scavenging activity of α,α-Diphenyl-β-Picrylhydrazyl (DPPH), hydroxyl radicals (OHˉ) and inhibition of lipid peroxidation in rat liver homogenate in vitro. The present findings revealed that, Lactobacillus plantarum subsp. plantarum DSMZ 20174 and Lactobacillus acidophilus DSMZ 20079 T possessed the highest antioxidant properties, tolerated acidity up to 4 and revealed viability under bile salt concentration up to 0.5%. The results of this study provide new insights into the lactic acid bacteria with antioxidative properties as they tolerated acidity up

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