Antimicrobial susceptibility among gram-positive and gram-negative blood-borne pathogens collected between 2012-2016 as part of the Tigecycline Evaluation and Surveillance Trial.
Antimicrob Resist Infect Control
; 7: 152, 2018.
Article
in En
| MEDLINE
| ID: mdl-30564308
ABSTRACT
Background:
Antimicrobial activity of tigecycline and comparator agents was assessedin vitroagainst 27857 isolates source from blood samples collected between 2012 and 2016 as part of the Tigecycline Evaluation and Surveillance Trial (TEST).Methods:
The broth microdilution methods was used to determine minimum inhibitory concentrations (MIC) of blood-borne isolates according to guildlines of the Clinical and Laboratory Standards Institute (CLSI). Antimicrobial susceptibility breakpoints from CLSI guidelines were used as standards to determine susceptibility against comparator agents, whereas tigecycline breakpoints were provided by the US Food and Drug Administration (FDA).Results:
More than 91% Enterobacteriaceae isolates, belonging to Escherichia coli, Klebsiella pneumoniae, Enterobacter cloacaeandSerratia marcescens, were susceptible to amikacin, meropenem, and tigecycline. Meropenem resistance was observed in 8% ofK.pneumoniae isolates worldwide. Extended-spectrum ß-lactamase (ESBL) was produced in 15.9 and 20.9%E.coli and K.pneumoniaeisolates, respectively. MIC90 of tigecycline against Acinetobacter baumannii was 2 µg/ml. The highest proportion of susceptible A.baumanniiisolates was 70.8% for minocycline. Among P.aeruginose isolates worldwide, 71.1-94.9% were susceptible to six antibiotics. Almost all Staphylococcus aureusisolates were susceptible to linezolid(100%), vancomycin(100%), and tigecycline (99.9%). The proportion of methicillin-resistant S.aureus (MRSA) was 33.0% among S.aureusisolates worldwide; it was highest in Asia with 46.6%, followed by North America and Latin America with 37.7 and 34.2%, respectively. Vancomycin-resistant (VR) isolates represented 1.4% ofEnterococcus faecalis (VR.E.faecalis) and 27.6% of Enterococcus faecium(VR.E.faecium). Highest percentages of VR.E.faeciumwere found in North America and Latin America, with 61.6 and 58.1% of the isolates, respectively. Production of penicillin-resistant Streptococcus pneumoniae(PRSP) represented 9.0% of S. pneumoniae isolates worldwide; the PRSP proportion was 25.8% in Asia, 13.0% in Africa, and 11.8% in Latin America.Conclusions:
In our study, tigecycline was the only antibiotic that was active against over 90% of all major blood-borne pathogens. A global comparison revealed that antimicrobial resistance was higher in Africa, Asia and Latin America than in Europe and North America.Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Blood-Borne Pathogens
/
Tigecycline
/
Gram-Negative Bacteria
/
Gram-Positive Bacteria
/
Anti-Infective Agents
/
Anti-Bacterial Agents
Type of study:
Guideline
/
Screening_studies
Limits:
Aged80
Country/Region as subject:
Africa
/
America do norte
/
Asia
/
Europa
Language:
En
Journal:
Antimicrob Resist Infect Control
Year:
2018
Document type:
Article
Affiliation country: