Yes, consuming old chocolate can potentially lead to salmonella if the chocolate has been stored improperly or exposed to conditions that encourage bacterial growth. Salmonella is a bacteria that can cause foodborne illness, leading to symptoms like stomach cramps, diarrhea, fever, and vomiting. However, the cocoa in chocolate has low moisture, which makes it less susceptible to bacterial contamination. Yet, if chocolate has been stored in a humid, warm, or unhygienic environment, it might become a breeding ground for bacteria, including salmonella. I once had an experience where I consumed expired chocolate and fell ill, emphasizing the importance of checking the expiration date and storage conditions to prevent such risks.