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General trends in genetic and phenotypic differences between nonclinical strains of S. suis taken from the upper respiratory tract of pigs versus clinical strains of S. suis taken from the brain and lungs [64,145,146,149]: MLST = multi-locus sequence type; each MLST is defined by displaying the same allelic variant at 7 housekeeping genes. The pictures have been reproduced under a creative commons 3.0 licence from Servier Medical Art (www.smart.servier.com).
