A 68-year-old man with chronic obstructive pulmonary disease (COPD) presents with a 3-day history of productive cough with purulent sputum, fever (38.5°C), and dyspnea. Physical examination reveals crackles in the right lower lobe and wheezing bilaterally. Chest X-ray shows patchy, ill-defined infiltrates involving multiple lobes with a bronchocentric distribution. Sputum culture grows Haemophilus influenzae. Which type of pneumonia does this clinical and radiological presentation most likely represent?