No, the beef is just prepared by a kid getting paid minimum wage, and thus is likely contaminated with loads of salmonella. Your body reacts that way because in all likelihood the tacos they sell are literal poison.
Salmonella usually takes a day or two to start showing symptoms, or at least 8 hours. If you're seeing results within the hour, it's not from salmonella.
This is my signature. It exists to keep people from skipping the last line of my posts.