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Original ArticleOpen Access
Vancomycin-Resistant Enterococci in King Chulalongkorn Memorial Hospital: A 5-Year Study
Nilgate S 
,
Nunthapisud P ,
Chongthaleong A
,
Nunthapisud P ,
Chongthaleong A SUMANEE NILGATE, MSc*,
PONG PUN NUNTHAPISUD, MSc**,
ANAN CHONGTHALEONG, MD**
The emergence of hospital acquired infections with bacteria resistant to antimicrobials such
as vancomycin resistant enterococci (VRE) has become a worldwide concern. The authors studied the
prevalence and surveillance of 5 years study of VRE in King Chulalongkon Memorial Hospital and
phenotype of these resistance strains. A total of enterococci 1854 isolates were collected from clinical
specimens from 1995 to 1999. Screening vancomycin resistance was identified by the agar plated
method and minimal inhibitory concentration (MIC) of vancomycin was determined for vancomycin-
resistance strains by E-test.
The results demonstated that 15 (0.81%) VRE were isolated from 1,854 specimens. Fourteen
VRE were identified as
Enterococcus faecium
and one strain was
Enterococcus faecalis.
All of these
strains, carrying the VanB phenotype, were susceptible to teicoplanin.
Similar to other studies, most VRE strains are
E.
faecium.
To the authors' knowledge, this is
the first VRE study carried out in King Chulalongkom Memorial Hospital. The results showed a low
prevalence of VRE and surveillance of 5 years study demonstated a gradual increase of VRE. There-
fore, it is important to continue periodic surveys of VRE to prevent the spread of VRE in hospitals.
Key word
: VRE, Phenotype
PONG PUN NUNTHAPISUD, MSc**,
ANAN CHONGTHALEONG, MD**
The emergence of hospital acquired infections with bacteria resistant to antimicrobials such
as vancomycin resistant enterococci (VRE) has become a worldwide concern. The authors studied the
prevalence and surveillance of 5 years study of VRE in King Chulalongkon Memorial Hospital and
phenotype of these resistance strains. A total of enterococci 1854 isolates were collected from clinical
specimens from 1995 to 1999. Screening vancomycin resistance was identified by the agar plated
method and minimal inhibitory concentration (MIC) of vancomycin was determined for vancomycin-
resistance strains by E-test.
The results demonstated that 15 (0.81%) VRE were isolated from 1,854 specimens. Fourteen
VRE were identified as
Enterococcus faecium
and one strain was
Enterococcus faecalis.
All of these
strains, carrying the VanB phenotype, were susceptible to teicoplanin.
Similar to other studies, most VRE strains are
E.
faecium.
To the authors' knowledge, this is
the first VRE study carried out in King Chulalongkom Memorial Hospital. The results showed a low
prevalence of VRE and surveillance of 5 years study demonstated a gradual increase of VRE. There-
fore, it is important to continue periodic surveys of VRE to prevent the spread of VRE in hospitals.
Key word
: VRE, Phenotype
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