Sodium Chloride Promotes the Growth of Bacterial Soil Isolate and Antimicrobial Activity of Polymixin B

Abstract

The decomposition of organic matter in the soil, soil salinity, and soil acidity are influenced by soil microbiology, which also controls the recycling and processing of nutrients in the soil. These factors affect soil fertility and ecological stability. This manuscript is focused on the isolation of seven gram-negative bacteria found in the agricultural soil of The Neotia University campus, West Bengal, India. These isolates have been found to be mesophilic based on their study of their growth profiles, which revealed that under the same incubation conditions, the isolates displayed rising development patterns between 24 and 120 hours. The presence of sodium and potassium chloride modulates the growth and development of bacterial strains (DNI1, DNI2, DNI3, DNI4, DNI5, DNI6, and DNI7) during laboratory set up. The sodium and potassium chloride composition of culture media that effectively regulates the development of bacterial isolates has been determined using the combinational method of salt treatment. The ideal physical factor required for the growth and development of microorganisms has been demonstrated by the pH and temperature titration during this study. The powerful antibiotics known as polymyxin B, which are nonribosomal lipopeptides produced by Paenibacillus polymyxa, are especially effective against Gram-negative bacteria. Because multidrug-resistant Gram-negative bacteria have few other choices for treating infections, the use of polymyxins in clinical settings has increased despite their toxicity in the past. This study offers an update on the most current findings about the bioactivity of soil isolates and their significant relationships to temperature, pH, salt, and polymixin B sensitivity. The toxicity impact may be reduced by enhancing polymixin Bs antibacterial activity with salt treatment in clinical research.