If cream was left out all night at room temperature, it is generally not safe to consume, even if it was unopened. Dairy products, including cream, are highly perishable and can quickly become a breeding ground for harmful bacteria when left at temperatures above 40°F (4°C) for an extended period.
The "Danger Zone" for food is between 40°F (4°C) and 140°F (60°C), where bacteria can multiply rapidly. If cream is left out at room temperature for several hours, it is likely to have entered this danger zone, making it susceptible to bacterial growth, particularly harmful ones like Staphylococcus aureus or Salmonella.
Consuming spoiled cream can lead to foodborne illnesses, which can cause symptoms like nausea, vomiting, diarrhea, abdominal cramps, and fever.
To ensure food safety, it's essential to follow the guidelines for proper storage and handling of dairy products like cream. Always refrigerate cream promptly after use and do not leave it out at room temperature for an extended period. If you find that the cream has been left out overnight or for a considerable length of time, it's best to discard it to avoid any potential health risks.