The chief public health office says 205 cases of the gastrointestinal illness have been reported since the 500 meals were distributed April 28 at Princetown United Church.
People complained of diarrhea, abdominal pain and nausea after eating the dinner, which also included vegetables, a roll and desserts.
Dr. Lamont Sweet, deputy chief public health officer, said this week that many people were ill for only a few hours.
Officials are still awaiting the results of food testing, but say they believe the roast beef likely caused the sickness after interviewing people who ate the meals.
In a release, the government says the roast beef was prepared at a number of sites, including the homes of volunteers, before it was sold.
The government says high-risk food such as meat must be cooked in a facility that's been licenced by the Health Department before it is sold to the public.