A 58-year-old man presented with recurrent angioedema and dyspnea following consumption of pork or beef. Until three years ago, he had never experienced adverse reactions after meals. Beginning two years ago, when he consumed beef, pork, or goat meat, urticaria appeared approximately 3-4 hours later, followed rapidly by angioedema, dyspnea, nausea, and vomiting. One month ago, he presented to the emergency department four hours after eating pork with angioedema, dyspnea, and dizziness, and was diagnosed with anaphylaxis associated with hypotension. He resides in a rural area and engages in hillside farming as a weekend hobby. Three years ago, he sustained an insect bite on his leg-presumably from a tick-resulting in a rash and small nodular scarring. He reports no symptoms following consumption of other foods; duck and chicken cause no adverse reactions. What is the most likely diagnosis?

A 52-year-old woman with a history of pulmonary tuberculosis began combination therapy with isoniazid (INH), rifampin (RFP), pyrazinamide (PZA), and ethambutol (EMB) one month prior. Three days before presentation, she developed a fever over 38°C accompanied by tonsillar swelling. Believing it to be a common cold, she self-administered antipyretics as needed for fever. One day before admission, she noticed a worsening, generalized pruritic erythematous rash. Her pruritus intensified, and she developed facial edema, leading her to seek emergency care. On examination, she was found to have bilateral cervical lymphadenopathy. Chest imaging, laboratory evaluation, and detailed assessment of the rash were performed.

What is the most likely diagnosis?