iarjalsIARJALSIARJALS2708-5104https://doi.org/10.47310/iarjals.2023.v02i02.076Effect of Aqueous and Alcoholic extract of Camellia sinensis and Eucalyptus sp. on some pathogenic bacterial speciesNoorM.Al-HumaidyDumooaF.Al-HameedawiAhlam.MKudaierPathological Analysis, College of Science, University of Sumer, Thi-Qar, IraqThe study included an inhibitory study of two types of medicinal plants Camellia sinensis and Eucalyptus sp. against two types of pathogenic bacterial isolates, Escherichia coli and Staphylococcus aureus. Two types of extracts were made for both plants, the aqueous extract of Camellia sinensis was characterized as having the most effect on Escherichia coli at a concentration of 200 μl and the alcoholic extract of Camellia sinensis was characterized as having equal effect on Escherichia coli and Staphylococcus aureus. The aqueous extract of Eucalyptus sp. was characterized as having an effect on Staphylococcus aureus at a concentration of 200 μl. but the alcoholic extract of Eucalyptus sp. was characterized as having a greater effect on Staphylococcus aureus at a concentration of 200 μl. The sensitivity of bacteria to antibiotics was examined using Ampicillin, Erythromycin, and Piperacillin antibiotics. Escherichia coli bacteria were characterized by being more resistant to all antibiotics, while Staphylococcus aureus were sensitive only to Oxacillin.