A northern California sprout grower was linked to an outbreak of Salmonella Montevideo infections. This same sprouter was associated with a simultaneous outbreak of Salmonella Meleagridis involving its alfalfa and mixed sprouts. Salmonella Montevideo was never isolated from the implicated sprouts. The sprout grower used soil and did not disinfect the seeds prior to sprouting. The sprouter had recently begun periodic laboratory testing of sprouts. Prior to this outbreak, the laboratory had reported the presence of Salmonella, but the sprouter took no action. The alfalfa seeds had been harvested from a farm in Southern California that had fertilized the plants with uncomposted chicken manure and watered the plants with nonpotable canal water. Animal fecal matter was present around these fields which was found to be contaminated with other strains of Salmonella.