Purpose : To know the trends of antimicrobial susceptibility is critical for antimicrobial
treatment. We studied the organisms isolated from blood, urine, stool, and cerebrospinal fluid
from 1997 to 2001 to reveal the trends of their antimicrobial susceptibility.
Methods : We conducted a retrospective study with isolates obtained from 0~18 year
old outpatients and inpatients from 1997 to 2001 at Department of Pediatrics, Hanil general
hospital. We gathered the data through the laboratory test files and the origin of microorganisms
cultured from blood, urine, stool and cerebrospinal fluid and their antimicrobial susceptibility.
Results : Microorganisms were isolated from 226(3.3%) out of 6,974 blood cultures, 365
(8.0%) out of 4,549 urine cultures, 50(1.9%) out of 2,593 stool cultures and 9(1.4%) in 655
cerebrospinal fluid cultures. The most frequently isolated organisms from blood cultures was
Staphylococcus epidermidis(33.5%) which was followed by Staphylococcus aureus(19.7%),
Escherichia coli(13.8%), and Burkholderia cepacia(9.0%). Among the urine cultures, E. coli
was the most common(74.7%) which was followed by Group D Enterococcus(11.3%), Klebsiella
pneumoniae(7.1%) and Proteus mirabilis(2.5%). The positive stool cultures all yield
Salmonella species. Group D Salmonella was obtained most frequently. Among the positive
cerebrospinal fluid cultures, Group B Streptococcus was isolated most frequently. Among the
40 cases of S. aureus in blood cultures, 27 cases were methicillin-resistant. The rates of susceptibility
for amikacin, ceftizoxime and ceftriaxone of E. coli isolated from blood cultures
were 80%, 100% and 60% in 1997 and 60%, 80% and 60% in 2001. The rates of susceptibility
for amikacin, ceftizoxime and ceftriaxone of K. pnumoniae isolated from urine cultures. were 80%, 100% and 80% in 1997 and 50%, 83% and 50% in 2001 Enterococcus was isolated
from 6.7% to 15.8% and vancomycin-resistant Enterococcus was observed in 17% of
Group D Enterococcus isolated from urine cultures. The rates of susceptibility for amikacin,
ceftizoxime and ceftriaxone of Group D Salmonella were 96%, 96% and 92% during the
study period.
Conclusion : Among the blood cultures S. epidermidis, S. aureus, E. coli and B. cepacia
were isolated in order of frequency and among the urine cultures E. coli, Group D
Enterococcus, K. pneumoniae and P. mirabilis were isolated in order of frequency. During
the study period there was no big difference in major organisms isolated from blood and
urine. The methicillin-resistant S. aureus was observed in 67% of S. aureus isolated from
blood cultures but vancomycin-reistant S. aureus or vancomycin intermediate resistant S. aureus
was not observed. The rates of susceptibility to amikacin and the third generation
cephalosporin of E. coli isolated from blood cultures and K. pneumoniae from urine cultures
have decreased. The isolation rates of Group D Enterococcus and vancomycin resistant Enterococcus
have increased.
Purpose : To know the trends of antimicrobial susceptibility is critical for antimicrobial
treatment. We studied the organisms isolated from blood, urine, stool, and cerebrospinal fluid
from 1997 to 2001 to reveal the trends of their antimicrobial susceptibility.
Methods : We conducted a retrospective study with isolates obtained from 0~18 year
old outpatients and inpatients from 1997 to 2001 at Department of Pediatrics, Hanil general
hospital. We gathered the data through the laboratory test files and the origin of microorganisms
cultured from blood, urine, stool and cerebrospinal fluid and their antimicrobial susceptibility.
Results : Microorganisms were isolated from 226(3.3%) out of 6,974 blood cultures, 365
(8.0%) out of 4,549 urine cultures, 50(1.9%) out of 2,593 stool cultures and 9(1.4%) in 655
cerebrospinal fluid cultures. The most frequently isolated organisms from blood cultures was
Staphylococcus epidermidis(33.5%) which was followed by Staphylococcus aureus(19.7%),
Escherichia coli(13.8%), and Burkholderia cepacia(9.0%). Among the urine cultures, E. coli
was the most common(74.7%) which was followed by Group D Enterococcus(11.3%), Klebsiella
pneumoniae(7.1%) and Proteus mirabilis(2.5%). The positive stool cultures all yield
Salmonella species. Group D Salmonella was obtained most frequently. Among the positive
cerebrospinal fluid cultures, Group B Streptococcus was isolated most frequently. Among the
40 cases of S. aureus in blood cultures, 27 cases were methicillin-resistant. The rates of susceptibility
for amikacin, ceftizoxime and ceftriaxone of E. coli isolated from blood cultures
were 80%, 100% and 60% in 1997 and 60%, 80% and 60% in 2001. The rates of susceptibility
for amikacin, ceftizoxime and ceftriaxone of K. pnumoniae isolated from urine cultures. were 80%, 100% and 80% in 1997 and 50%, 83% and 50% in 2001 Enterococcus was isolated
from 6.7% to 15.8% and vancomycin-resistant Enterococcus was observed in 17% of
Group D Enterococcus isolated from urine cultures. The rates of susceptibility for amikacin,
ceftizoxime and ceftriaxone of Group D Salmonella were 96%, 96% and 92% during the
study period.
Conclusion : Among the blood cultures S. epidermidis, S. aureus, E. coli and B. cepacia
were isolated in order of frequency and among the urine cultures E. coli, Group D
Enterococcus, K. pneumoniae and P. mirabilis were isolated in order of frequency. During
the study period there was no big difference in major organisms isolated from blood and
urine. The methicillin-resistant S. aureus was observed in 67% of S. aureus isolated from
blood cultures but vancomycin-reistant S. aureus or vancomycin intermediate resistant S. aureus
was not observed. The rates of susceptibility to amikacin and the third generation
cephalosporin of E. coli isolated from blood cultures and K. pneumoniae from urine cultures
have decreased. The isolation rates of Group D Enterococcus and vancomycin resistant Enterococcus
have increased.