Severe Illness Post-Cheddar McMelt - McDonald's, São Paulo

1001 Avenida Professor Vicente Rao, 04632-001 São Paulo, Brazil

On March 24 at 19:00 I ate a McMelt cheddar sandwich, after 2 hours the first symptoms began... malaise and swollen belly.
Soon after, I started having many bouts of vomiting, diarrhea, and severe pain in the head. After that, a lot of fever reaching 39.9°... I went to the hospital, getting there, what was the result: food poisoning.
Too bad a network as large as McDonald's doesn't have quality control, now who will be responsible? | Symptoms: Nausea, Diarrhea, Vomiting, Fever, Headache, Swelling