An outbreak of gastrointestinal illness causing vomiting and diarrhea at a downtown Halifax hotel is under investigation by officials at the Capital District Health Authority.

The health authority said at least 50 staff and guests at the Delta Halifax have fallen ill this week.

It said the hotel has increased cleaning, removed "suspected" food and is asking staff who fall ill not to return to work until 48 hours after symptoms end.

The illness spreads by coming into contact with the vomit or feces of an infected person. The health authority said all ages can be infected, but most people recover within a day or two.

No one has been admitted to hospital, the health authority said. Symptoms include diarrhea and vomiting, while some suffer fevers, stomach cramps and chills.

Health officials are urging people to wash their hands regularly and stay home if they are sick. Food handlers and health-care workers should stay home until 48 hours after vomiting and diarrhea stops.

People suffering from symptoms can call 811 to speak with a nurse. Health officials also want anyone who feels sick and who attended a meeting at the Delta Halifax to call public health at 902-481-5824.