Antimicrobial Susceptibility Testing Performed in RPMI 1640 Reveals Azithromycin Efficacy against Carbapenem-Resistant Acinetobacter baumannii and Predicts In Vivo Outcomes in Galleria mellonella.

Antimicrobial Susceptibility Testing Performed in RPMI 1640 Reveals Azithromycin Efficacy against Carbapenem-Resistant Acinetobacter baumannii and Predicts In Vivo Outcomes in Galleria mellonella.
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DOI:
10.1128/aac.01320-22
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发表时间:
2023-01-24
影响因子:
4.9
通讯作者:
--
中科院分区:
医学2区
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RPMI 1640(一种生理相关性更强的培养基)中的抗菌药物敏感性测试(AST)显示,相当大比例的碳青霉烯类耐药鲍曼不动杆菌分离株对阿奇霉素敏感,阿奇霉素是一种大环内酯类抗生素,目前被认为对鲍曼不动杆菌无效。使用大蜡螟进行的实验验证了这些体外数据。我们发现 RPMI 1640 对体内结果的预测准确性优于 Mueller-Hinton II 肉汤,这也支持使用更生理相关的 AST 培养条件。
Antimicrobial susceptibility testing (AST) in RPMI 1640, a more physiologically relevant culture medium, revealed that a substantial proportion of carbapenem-resistant Acinetobacter baumannii isolates were susceptible to azithromycin, a macrolide antibiotic not currently considered effective against A. baumannii. Experiments using Galleria mellonella validated these in vitro data. Our finding that RPMI 1640’s predictive accuracy for in vivo outcomes is superior to that of Mueller-Hinton II broth also supports the use of more physiologically relevant AST culturing conditions.
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