On October 20, 2010, the Texas Department of State Health Services ordered Sangar Fresh Cut Produce, located in San Antonio, Texas, to stop production, and to recall, all products shipped from the plant since January. An investigation found that all ten case patients had recently eaten in hospital settings. Food and environmental samples were collected from the hospitals. Listeria monocytogenes was detected in chicken salad and prepackaged, diced celery only. Traceback of the celery led to an investigation of the SanGar Produce & Processing Company. Listeria monocytogenes was subsequently isolated from plant environmental and product samples. Numerous sanitation and temperature control problems were found. All SanGar products were recalled as it seemed likely that other fresh vegetable products would have become contaminated. All case patients had pre-existing health problems thus increasing their risk of infection. There was a high case mortality rate of 50%. SanGar Fresh Cut products were sold to restaurant and institutional settings, not grocery stores.