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Strains used in this studya
SA-HVX denotes the endogenous strain of carrier X. In cases where two strains were isolated from the same carrier, SA-HVXa and b denote the two strains. Circles denote screening results. A black circle denotes a positive result, a gray circle denotes a positive result with a second strain, and a white circle denotes a negative result. A broken line indicates a period of unknown carriage status.
