A 21-year-old man comes to the emergency department due to shortness of breath, fatigue, myalgias, and debilitating retroorbital headaches for the past several days. The patient is on summer break and came to work at his grandparents' dairy farm 3 weeks ago. He cleans out animal waste from the barn, but he does not handle hay. His past medical history is insignificant. He does not use tobacco or illicit drugs. The patient's temperature is 38.8 C (101.8 F) . Bronchial breath sounds are heard in the right lower lung. There are no cardiac murmurs. Abdominal examination is unremarkable. Chest x-ray demonstrates right lower and middle lobe consolidation. Laboratory results are as follows: 
An HIV test is negative.Which of the following is the most likely cause of this patient's symptoms?
Definitions:
Cognitive Dissonance
Situation in which the pieces of knowledge, information, attitudes, or beliefs held by an individual are contradictory.
Contradictory
In direct opposition or conflict with something, creating inconsistency or a paradox.
Emotional Contagion
The automatic and unconscious transfer of emotions between individuals based on cues that one person observes in another.
Good Mood
A positive emotional state characterized by feelings of happiness, satisfaction, and well-being.
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