Re-exploration of the experiment"Exploring the Selective Effect of Antibiotics on Bacteria"
To further expand the investigation of"Exploring the Selective Effect of Antibiotics on Bacteria",three experiments have been designed based on the existing curriculum:"Inhibitory Effects of Six Antibiotics on Three Types of Bacteria","The Antibiotic Resistance Experiment of Staphylococcus aureus",and"The Inhibitory Effects of Extracts from Three Plants:Garlic,Mint,and Lemon on Bacteria".The experimental results indicated the following:① Various antibiotics exhibited different selective effects on different bacteria.Gentamicin,enrofloxacin,and tetracycline demonstrated strong antibacterial activity;cefaclor showed significant antibacterial effects against Escherichia coli;erythromycin and amoxicillin did not exhibit sensitivity towards E.coli and Staphylococcus aureus,respectively.②Staphylococcus aureus developed resistance progressively by the second and third generations;③Garlic exhibited inhibitory effects on three types of bacteria,while mint and lemon showed minimal inhibitory effects.The three expanded experimental methods were simple,and the results regarding the selective effects on bacteria were evident,making them suitable for educational purposes.
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