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Volume 12, Number 3—March 2006

Dispatch

Aquariums as Reservoirs for Multidrug-resistant Salmonella Paratyphi B

Renee S. Levings*†, Diane Lightfoot‡, Ruth M. Hall§, and Steven P. Djordjevic*Comments to Author 
Author affiliations: *Elizabeth Macarthur Agricultural Institute, Camden, New South Wales, Australia; †University of Wollongong, Wollongong, New South Wales, Australia; ‡University of Melbourne, Melbourne, Victoria, Australia; §University of Sydney, Sydney, New South Wales, Australia

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Table

Genetic characteristics of Salmonella enterica serovar Paratyphi B dT+ isolates used in this study

Isolate no.* Source† Phage type‡ State§ Date of isolation Age, y/Sex SGI1¶
Set 1
SRC229 H Aus2 ACT 2000 <1/F +
SRC230 H Aus2 ACT 2000 1/M +
SRC231 FT Aus2 ACT 2000 +
Set 2
SRC232# H Aus2 Vic 2000 11/F +
SRC233# H Aus2 Vic 2000 11/F +
SRC233A FT Aus2 Vic 2000 ND
Set 3
SRC145 H Aus3 Vic 2003 74/F +
SRC142 FT Aus3 Vic 2003 +
SRC143 FT Aus3 Vic 2003 +
Set 4
SRC149 H Aus3 Vic 2003 12/M +
SRC147 FT Aus3 Vic 2003 +
SRC148 FT Aus3 Vic 2003 +
Control
SRC50 H RDNC Vic 2001 14/M +**

*All isolates were resistant to ampicillin, chloramphenicol, streptomycin, spectinomycin, sulfonamides, and tetracycline.
†H, human isolates; FT, fish tank isolates.
‡Determined by using standard procedures and designations (http://www.geocities.com/avinash_abhyankar/typing.htm). RDNC, reaction does not conform. RDNC Aus2 and RDNC Aus3 are 1 var and 3b var phage-typing variants, respectively, and are identifiable and reproducible phage-typing patterns awaiting formal assignment by the World Health Organization–designated International Reference Laboratory, Colindale, UK.
§ACT, Australian Capital Territory; Vic, Victoria.
¶SGI1, Salmonella genomic island 1; ND, strain not available for molecular analysis.
#Isolates are from the same person.
**Data from Levings et al. (7).

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