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Proventricular dilatation disease (PDD) is an incurable probably viral disease of psittacine birds. It was first recognized and described in 1978 by Dr. Hannis L. Stoddard. Since the first reported cases were involving species of macaw, the condition was termed macaw wasting syndrom
Others use the general category because the term PDD actually refers to a category of disorders and is not a diagnostic label. [4] PDD is not itself a diagnosis, while PDD-NOS is a diagnosis. To further complicate the issue, PDD-NOS can also be referred to as "atypical personality development", "atypical PDD", or "atypical autism". [citation ...
PDD-NOS was one of four disorders collapsed into the diagnosis of autism spectrum disorder in the DSM-5, [3] and also was one of the five disorders classified as a pervasive developmental disorder (PDD) in the DSM-IV. [4] The ICD-10 equivalents also became part of its definition of autism spectrum disorder, as of the ICD-11.
Based on the relationship with levodopa dosing, dyskinesia most commonly occurs at the time of peak l-DOPA plasma concentrations and is thus referred to as peak-dose dyskinesia (PDD). As patients advance, they may present with symptoms of diphasic dyskinesia (DD), which occurs when the drug concentration rises or falls.
Psittacine beak and feather disease was first described in the early 1980s and has become recognised as the dominant viral pathogen of psittacine birds worldwide. In wild red-rumped grass parakeets (Psephotus haematonotus), a case of feather loss syndrome that was highly suggestive of PBFD was first recorded in South Australia in 1907. [2]
Thought problems that are well out of proportion with mental age, including irrationality, sudden intrusions on normal thought process, magical thinking, neologisms or nonsense words repeated over and over, desultory thinking, blatantly illogical bizarre ideas. Confusion between reality and fantasy life.
Dysthymia (/ d ɪ s ˈ θ aɪ m i ə / dihs-THIY-mee-uh), also known as persistent depressive disorder (PDD), [3] is a mental and behavioral disorder, [5] specifically a disorder primarily of mood, consisting of similar cognitive and physical problems as major depressive disorder, but with longer-lasting symptoms.
Communication problems are also part of the autism spectrum disorder (autism); however, individuals with autism also show a restricted pattern of behavior, according to behavioral psychologists. The diagnosis of SPCD can only be given if autism has been ruled out. [11]
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