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Journal of Clinical Microbiology, January 2001, p. 228-234, Vol. 39, No. 1
0095-1137/01/$04.00+0 DOI: 10.1128/JCM.39.1.228-234.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.
Epidemiology and Infection Control Implications of
Acinetobacter spp. in Hong Kong
Elizabeth T. S.
Houang,1,*
Y. W.
Chu,1
C. M.
Leung,1
K. Y.
Chu,1
J.
Berlau,2
K. C.
Ng,1 and
A. F. B.
Cheng1
Department of Microbiology, The Chinese
University of Hong Kong, Prince of Wales Hospital, Shatin NT, Hong
Kong SAR, People's Republic of China,1 and
Department of Ophthalmology, University of Rostock, 18057 Rostock, Germany2
Received 30 March 2000/Returned for modification 12 September
2000/Accepted 17 October 2000
In a previous study, we showed that Acinetobacter
genomic DNA group 3 was the most common species among blood culture
isolates and was commonly found on superficial carriage sites of the
healthy and the sick, which are different findings from those reported in Europe and North America. We used amplified ribosomal DNA
restriction analysis and pulsed-field gel electrophoresis to study
further the molecular epidemiology of acinetobacters in our region.
Over a study period of 6 weeks with 136 consecutive routine clinical isolates (1.33% of all specimens), genomic DNA groups 2 (Acinetobacter baumannii), 3, and 13TU were obtained from
59 of 69 positive patients. There is a significant difference in the
specimen sources of the three genomic DNA groups, with group 13TU being
significantly associated with the respiratory tract (chi-square exact
test, P = 0.0064). Settle plates showed a
significantly heavier environmental load from the intensive care unit
(ICU) than from the four surgical wards examined (22 of 70 versus 76 of
120 plates with <5 colonies; chi-square test, P < 0.0001). Genomic group 3 accounted for 6 of 12 clusters of
possibly related strains among patients, between patients and the ICU
environment, and in the ICU environment. Genomic groups 2 and 3 accounted for 21% of the 132 genomically identified isolates recovered
from 21 of 41 local vegetables, 53 of 74 fish and meat samples, and 22 of 60 soil samples. Group 13TU was present only in patients' immediate
surroundings. The role played by the environment and by human carriage
should be evaluated in order to devise a cost-effective infection
control program pertinent to our situation of acinetobacter endemicity.
*
Corresponding author. Mailing address: Department of
Microbiology, The Chinese University of Hong Kong, Prince of Wales
Hospital, Shatin NT, Hong Kong SAR, People's Republic of China. Phone:
(852) 2632 2304. Fax: (852) 2647 3227. E-mail:
ehouang{at}cuhk.edu.hk.
Journal of Clinical Microbiology, January 2001, p. 228-234, Vol. 39, No. 1
0095-1137/01/$04.00+0 DOI: 10.1128/JCM.39.1.228-234.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.
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