Final answer:
The patient with paranoid behavior and disorganized speech most likely suffers from paranoid schizophrenia, a subtype of schizophrenia characterized by hallucinations and delusions. Antipsychotic medications are typically used to manage the symptoms of this mental illness.
Step-by-step explanation:
The 22-year-old man displaying bizarre paranoid behavior and claiming that there are worms living under his skin appears to be suffering from a subtype of schizophrenia. Based on the symptoms described, such as paranoia, disorganized speech, behavioral disturbances, and no significant history of catatonia or severe disorganization of behavior, the subtype that most characterizes this patient's condition is paranoid schizophrenia (C). This form of schizophrenia is characterized primarily by the presence of auditory hallucinations or prominent delusional thoughts about persecution or conspiracy.
Treatment for schizophrenia usually involves antipsychotic medications that block dopamine receptors, which can effectively manage symptoms like delusions and hallucinations. It is critical for individuals with schizophrenia to remain under medical supervision and continue their prescribed medication regimen to manage their condition effectively.