Elgendy SG, Abdel Hameed MR, El-Mokhtar MA. Tigecycline resistance among Klebsiella pneumoniae isolated from febrile neutropenic patients.
J Med Microbiol 2018;
67:972-975. [PMID:
29799385 DOI:
10.1099/jmm.0.000770]
[Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Febrile neutropenic patients are at a high risk of life-threatening bacterial infections. Tigecycline was developed to treat multidrug-resistant isolates, however resistance to tigecycline in Klebsiella pneumoniae has been reported. Here, we investigated tigecycline resistance among K. pneumoniae isolated from febrile neutropenic patients admitted to Hematology ICU, Egypt. Out of 75 enrolled febrile neutropenic patients, 48 cases showed bacteriologically confirmed infection. The majority of cases were infected with K. pneumoniae, of which nine were tigecycline non-susceptible. Expression levels of the efflux pump genes acrB and oqxB and their regulatory genes ramA and rarA were analysed. Six isolates had overexpression of the four efflux-related genes while one showed baseline expression. This study emphasizes the importance of growing tigecycline resistance in K. pneumoniae infecting febrile neutropenic patients. Concerning the mechanism of resistance, it was clear that the ramA gene plays the major role, although alternative resistance mechanisms may also exist.
Collapse