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In the present study , we explored the in vitro combinatory effect of EGCG in combination with oxytetracycline against eight standard strains and clinical isolates of Staphylococcus aureus , including erythromycin , methicillin and tetracycline resistant strains .
 Chemical: EGCG; Chemical: oxytetracycline; Chemical: erythromycin; Chemical: methicillin; Chemical: tetracycline
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: EGCG; Chemical: oxytetracycline; Chemical: erythromycin; Chemical: methicillin; Chemical: tetracycline