In vitro and in vivo evaluation of synergistic effects of combinations of antibacterials for the treatment of infections due to KPC and OXA-type carbapenemase-producing multidrug-resistant gram-negative bacteria endemic in Brazil

• Grant number: 11/04025-2
• Support Opportunities: Scholarships in Brazil - Master
• Start date until: August 01, 2011
• End date until: August 31, 2012
• Field of knowledge: Biological Sciences - Microbiology - Applied Microbiology
• Principal Investigator: Nilton Erbet Lincopan Huenuman
• Grantee: Micheli Medeiros
• Host Institution: Instituto de Ciências Biomédicas (ICB). Universidade de São Paulo (USP). São Paulo , SP, Brazil

Abstract

The hospital infection is a serious public health problem, which is usuallyassociated with multidrug-resistant (MDR) bacteria, and with high morbidity/mortality rates. For these infections, the use of extended-spectrum antibiotics is recommended. Unfortunately, the overuse or misuse of antibiotics has selected resistant strains exhibiting versatile and emerging mechanisms of resistance,contributing to the endemicity of MDR species in Brazil, such as, KPC-producing Klebsiella pneumoniae, Acinetobacter baumannii producing carbapenemases OXA-23- and OXA-143-like, and metallo-beta-lactamase (SPM-1)-producing Pseudomonas aeruginosa. The aim of this study is to investigate therapeutic alternatives based on synergistic activity (assessed by"checkerboard", "time-kill", and inhibitory/bactericidal activity) resulting from thecombination of two antibiotics (different classes), including new antibiotics (eg, tigecycline). Effective combinations will be evaluated in vivo by using a murine model of infection. The results are intended to contribute to the establishment of new therapeutic schemes to be implemented in health services. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

MICHELI MEDEIROS; NILTON LINCOPAN. Acinetobacter baumannii produtor de oxacilinases (OXA) no Brasil: impacto clínico, epidemiológico e opções terapêuticas. Jornal Brasileiro de Patologia e Medicina Laboratorial, v. 49, n. 6, p. 391-405, 2013-12-00. (11/04025-2)

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

MEDEIROS, Micheli. In vitro and in vivo synergistic effects of antibacterial agents for the treatment of multidrug-resistant OXA-type carbapenemase-producing Acinetobacter baumannii infections endemic in Brazil. 2013. Master's Dissertation - Universidade de São Paulo (USP). Conjunto das Químicas (IQ e FCF) (CQ/DBDCQ) São Paulo.