Schneider Ines, Queenan Anne Marie, Markovska Rumyana, Markova Boyka, Keuleyan Emma, Bauernfeind Adolf
MICOER Institute, Munich, Germany.
Antimicrob Agents Chemother. 2009 Oct;53(10):4518-21. doi: 10.1128/AAC.00461-09. Epub 2009 Jul 20.
A single Klebsiella pneumoniae strain isolated in a Bulgarian hospital was found to produce CTX-M-71, a new CTX-M variant characterized by one amino acid substitution from glycine to cysteine at position 238 in comparison to CTX-M-15. This exchange decreased the hydrolytic activity of the beta-lactamase for cefotaxime, ceftazidime, and cefepime.
在保加利亚一家医院分离出的一株肺炎克雷伯菌被发现可产生CTX-M-71,这是一种新的CTX-M变体,与CTX-M-15相比,其在第238位氨基酸处有一个从甘氨酸到半胱氨酸的替换。这种替换降低了β-内酰胺酶对头孢噻肟、头孢他啶和头孢吡肟的水解活性。