Pneumonia: This is the most likely diagnosis given the combination of fever, aspiration, and wheeze. Aspiration can lead to chemical pneumonitis or introduce bacteria into the lungs, causing an infectious pneumonia. Wheezing can occur due to the inflammatory response and airway irritation.

Acute Bronchitis: This condition can present with wheezing and fever, especially if there's an infectious component. Aspiration might not be a direct cause but could contribute to the development of bronchitis in a susceptible individual.
Chronic Obstructive Pulmonary Disease (COPD) Exacerbation: Patients with COPD can experience wheezing and may develop fever if there's a superimposed infection. Aspiration could trigger an exacerbation in someone with pre-existing COPD.
Asthma Exacerbation: Asthma can cause wheezing and may be triggered by aspiration, leading to an exacerbation. Fever might not be a primary symptom but could be present if there's a concurrent infection.

Pulmonary Embolism: Although less likely, pulmonary embolism can present with sudden onset of symptoms and could potentially cause fever and wheezing, especially if there's associated pulmonary infarction. Aspiration might not be directly related but could be a coincidental finding.
Foreign Body Aspiration: This is a critical diagnosis to consider, especially if the patient has a history of aspiration. It can cause wheezing and fever if there's an associated infection or chemical pneumonitis.

Eosinophilic Pneumonia: A rare condition that can cause fever, wheezing, and might be associated with aspiration if the patient has ingested something that triggers an eosinophilic response.
Allergic Bronchopulmonary Aspergillosis (ABPA): This condition occurs in asthmatic patients and can cause wheezing, fever, and might be associated with aspiration if the patient aspirates fungal elements, though this is less common.