A popular Chinese restaurant shut down earlier this week because of a salmonella outbreak has failed a follow-up inspection by Toronto Public Health.

On Wednesday, health inspectors slapped a red closed notice on Ruby Chinese Restaurant on Sandhurst Circle, after 37 people became ill after eating there.

Salmonella has been confirmed in 22 cases and is suspected in 15 others, including an elderly man who died of dehydration after a severe case of diarrhea.

“There were issues with proper handling and storing of the food to protect it from contamination. There was a cockroach infestation that was ongoing. It’s possible that these could have [led to the salmonella outbreak,]” revealed Dr. Howard Shapiro of Toronto Public Health.

But despite efforts to bring the restaurant up to standard by Friday, inspectors weren’t satisfied. They'll return when management lets them know the kitchen is ready for another inspection.

A public health report released last year found that although an estimated 400,000 people in the city suffer from food poisoning every year, it’s usually from meals prepared at home.

Symptoms of salmonella include diarrhea, constipation, headaches, stomach cramps, nausea, vomiting, fever and blood in the feces. Mild cases usually clear up in four to seven days. If the symptoms persist or are severe, consult a doctor.

For the most recent report on Ruby Chinese Restaurant, including seven previous inspections passed, click here.