Bacillus anthracis and cereus

A 28-year-old male farmer from rural Maharashtra presents with a painless, black, necrotic lesion on his left forearm that developed 5 days after a minor cut while handling animal hides. The lesion is surrounded by significant edema and is not suppurative. Blood culture and lesion swab are sent. Gram stain shows large, Gram-positive rods arranged in chains. The organism grows on blood agar as large, mucoid, non-hemolytic colonies. Which of the following is the most likely causative organism and the key virulence factor responsible for the characteristic black eschar?

A 32-year-old woman from Delhi presents to the emergency department with acute onset of severe watery diarrhea and vomiting 2 hours after consuming leftover rice-based dessert that had been stored at room temperature overnight. She denies fever and abdominal pain. Stool examination shows no blood or leukocytes. A Gram stain of the food sample reveals large, Gram-positive rods with eccentric spores. Culture on blood agar shows β-hemolytic colonies. Based on the clinical presentation and organism characteristics, what is the most likely diagnosis and the primary virulence mechanism?

Bacillus cereus is commonly implicated in foodborne illness. Which toxin is responsible for the emetic form of B. cereus food poisoning?