What is paranoid schizophrenia? How does someone get it?

Psych disorder. It is a psychiatric disorder manifested by paranoid delusions and deterioration in cognitive, social and behavioral functioning. It appears to be a disorder that is predominately developed genetically, but similar symptoms can occur with chronic abuse of stimulants (i.e. Methamphetamine).
Genetic. It is a specific type where pts have delusions of persecutions that the world is out to get them and every one is against them.The most important thing to remember that psychosis is not schizophrenia, when brain chemical Dopamine gets too high, senses can play tricks, so can hear things, see things, smell things, it could be due from sleep lack to drugs to medical issues, but schizophrenia is genetic.
Diagnosis. Schizophrenia is a disorder of thought. It is characterized by symptoms if psychosis including hallucinations and delusional thought. Cause is not yet known. Affected people have a genetic vulnerability that was manifested after exposure to stress. Effective treatments are available.
Being predisposed. This is a type of schizophrenia that is associated with irrational beliefs of being persecuted. There is a genetic predisposition to having schizophrenia but psychological and social stressors can precipitate it in one who is predisposed.