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When considering patients with suspected Psittaciformes HP, important environmental risk factors to consider are antigen concentration, duration of exposure, frequency of exposure, particle size, antigen solubility, genetic factors, and cigarette smoking status (1,11).
All members of the Order Psittaciformes, with the exception of the budgerigar and the cockatiel, are afforded protection by an international treaty, the Convention on International Trade in Endangered Species (CITES).
23) Our results are not comparable to those of the study in large Psittaciformes because no final range was established in that study.
This phenomenon has been documented in other Psittaciformes (e.
Psittaciformes and Columbiformes were not visibly affected by the outbreak although they were kept in large numbers in S2, where large numbers of deaths occurred.
Lymphoma has been described in birds in the orders Anseriformes, Charadriiformes, Columbiformes, Ciconiiformes, Galliformes, Passeriformes, Psittaciformes, Strigiformes, Sphenisciformes, Pelecaniformes, and Struthioniformes.
However, many taxa do not have a natal down, including all Piciformes, many Psittaciformes, most Coraciiformes, and some Corvidae (Jenni and Winkler 2004), and do not undergo a prejuvenal molt because the growth of juvenal plumage does not replace shed feathers.