Store-bought Caesar dressing uses pasteurized eggs and is safe during pregnancy. Traditional homemade Caesar dressing contains raw egg yolk which poses salmonella risk. Always ask at restaurants whether their Caesar dressing is made with raw eggs.
A "Use Caution" rating means this food is generally fine during pregnancy but comes with a specific factor worth managing — a daily limit, a preparation requirement, or a moderation guideline — rather than a reason to avoid it outright. These ratings reflect general guidance from the FDA, ACOG, CDC, and USDA. The goal of the "caution" label is to flag what to pay attention to, not to suggest the food is unsafe when that factor is properly managed.