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Volume 15, Number 3—March 2009

Research

Integron-mediated Multidrug Resistance in a Global Collection of Nontyphoidal Salmonella enterica Isolates

Mary G. Krauland, Jane W. Marsh, David L. Paterson, and Lee H. HarrisonComments to Author 
Author affiliations: University of Pittsburgh School of Medicine and Graduate School of Public Health, Pittsburgh, Pennsylvania, USA (M.G. Krauland, J.W. March, D.L. Paterson, L.H. Harrison); University of Queensland, Royal Brisbane and Women’s Hospital, Brisbane, Queensland, Australia (D.L. Paterson)

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Figure

Minimum spanning trees depicting integron distribution across Salmonella enterica genetic lineages. <!-- INSERT SHAPE -->A) dfrA12/orfF/aadA2; B) dfrA7; C) dfrA1/aadA1; D) arr2/blaOXA30/cmlA5/aadA2. Circles represent unique sequence types (STs). Red circles represent the STs that carried the integron involved in horizontal gene transfer. Numbers in circles represent the ST. Circle size reflects number of isolates in each ST. Pink and green shading indicates closely related groups of isolates. Le

Figure. Minimum spanning trees depicting integron distribution across Salmonella enterica genetic lineages. A) dfrA12/orfF/aadA2; B) dfrA7; C) dfrA1/aadA1; D) arr2/blaOXA30/cmlA5/aadA2. Circles represent unique sequence types (STs). Red circles represent the STs that carried the integron involved in horizontal gene transfer. Numbers in circles represent the ST. Circle size reflects number of isolates in each ST. Pink and green shading indicates closely related groups of isolates. Letters refer to serotypes: B, Brandenburg; C, Cholerasuis; E, Enteriditis; H, Heidelberg; G, Goettingen; I, Isangi; P, Paratyphi A; Z, Schwarzengrund; Y, Stanley; T, Typhimurium. Geographic sources of isolates are as follows: Panel A: ST66, serotype C, Taiwan; ST29, serotype C, Taiwan; ST29, serotype Y, Taiwan; ST96, serotype Z, Denmark and Taiwan; ST19, serotype T, US Centers for Disease Control and Prevention and South Africa; ST15, serotype H, Philippines; Panel B: ST11, serotype E, Uganda and South Africa; ST85, serotype P, Denmark; Panel C: ST334, serotype G, Spain; ST334, serotype B, Spain; ST34, serotype T, Germany; Panel D: ST19, serotype T, South Africa; ST216, ST335, ST336, and ST 337, serotype I, South Africa.

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