Outside a padlocked warehouse on Airport Boulevard in South San Francisco, a row of parked trucks bearing the slogan “Quong Hop & Co. quality soy foods since 1906” sit idle.

The company, which is among the largest tofu makers in California, stopped production last month when inspectors found the bacterium Listeria monocytogenes lurking in the factory and food made there, prompting a recall.

“Everything that was at the facility at the time of the investigation is under embargo,” said Patrick Kennelly of the California Department of Public Health.

Quong Hop officials did not respond to requests for comment.

This is not the first time Quong Hop has faced a recall due to listeria, and its problems with the deadly bacteria are putting the 100-year-old company’s future at risk.