The pathogenic bacteria of the human respiratory system are characterized by resistance to most antibiotics. Staphylococcus aureus and Klebsiella pneumonia are some of the pathogenic bacteria of the human respiratory system which often cause pneumonia and meningitis. Moreover, they are the most prominent strains of bacteria in most hospitals. Bacterial resistance to antibiotics occurs as a result of excessive usage of antibiotics in the treatment of diseases. For that reason, it is necessary to seek for medical alternatives that are safer for the treatment of these bacteria. Alternative medicine, especially, has revealed many plants and herbs that are used in the treatment for some diseases including respiratory diseases. The purpose of this study is to determine the effect of the IndianCostus and sea-Qust on the pathogenic bacteria; Escherichia coli, Pseudomonas aeruginosa, S. aureus and K. pneumonia. In addition, the effect of the water extracts of the Indian costus and sea-qust on S. aureus and K. pneumonia was also determined. The results showed antibacterial effect of two types of dried Costus roots on all tested bacteria, especially in high concentrations. Also, the cold or hot water extract of Indian Costus was highly effective against tested bacteria at 20 to 25% concentration, while the hot extract of sea-Qust was more effective against tested bacteria than its cold extract in all the concentrations used.
Key words: Medicinal plants, dried roots, bacterial resistance, lung diseases.
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