Is potato salad safe during pregnancy?

What does the evidence say about potato salad during pregnancy?

1. Foods like potato salad shouldn't sit in the 40 to 140 degree danger zone for more than two hours, since that's the window where foodborne bacteria multiply fastest. 1
2. Commercially made mayonnaise is acidified to a pH low enough to control Salmonella from the eggs used to make it, which is a different risk profile from homemade mayonnaise made with raw eggs. 2
3. Staphylococcus aureus multiplies in protein-rich prepared food left unrefrigerated for several hours and produces a heat-stable toxin; in one documented outbreak, illness began an average of about 2 hours after eating food that had sat out roughly 8 hours overnight. 3
4. Clostridium perfringens outbreaks are typically tied to food that was cooked, then cooled or reheated improperly before serving, which is part of why potlucks and catered buffets carry particular risk. 4
5. Symptoms tied to foods left too long in the danger zone, such as listeria infection, can include fever, muscle aches, and gastrointestinal symptoms, and can begin days to weeks after eating contaminated food. 1

Is potato salad safe in each trimester?

• First trimester. Morning sickness might make a cold, deli-style side sound better than anything else right now, and that's fine; the same two-hour rule applies in the first trimester as at any other time.
• Second trimester. In the second trimester, potato salad from a reputable, refrigerated source is a normal side dish. The risk is entirely about how long it sat out, not the dish itself.
• Third trimester. In the third trimester, outdoor summer gatherings raise the stakes since heat speeds up bacterial growth, so serve potato salad over ice and refrigerate leftovers promptly.