863 resultados para farmland birds
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"From the Smithsonian report for 1928." "Reprinted, with change of title...from the Journal of the Washington Academy of Sciences, vol.18, no.6, Mar. 19, 1928."
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Mode of access: Internet.
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Mode of access: Internet.
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Bibliogr.
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Mode of access: Internet.
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Includes bibliographical references (p. 35)
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"References" included.
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"First edition, copyrighted 1932."
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Includes The annual report of the Bird-ringing Committee, British Trust for Ornithology (issued as a paged-in supplement, 1958- )
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On t.-p. of v. 3: Illustrated with colored plates and drawings by Louis Agassiz Fuertes and Allan Brooks ... with a biograhical sketch of Edward Howe Forbush by John Bichard May.
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Mode of access: Internet.
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Mode of access: Internet.
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A study was undertaken on the pathology and associated schizont morphology of apicomplexan species of avian haematozoa. Some 32 birds from the families Artamidae, Meliphagidae, Oriolidae, Podargidae, Columbidae, Alcedinidae and Psittacidae were identified as having schizonts in various tissues. Based on blood stages observed, the probable relationship to tissue stages was considered. The majority of schizonts were referable to the genera Leucocytozoon and Haemoproteus . The comparative morphology of tissue stages previously described in the literature is discussed and the involvement of protozoa other than haematozoa considered. The naturally occurring infections in wild birds described in this study represent previously unreported data on the life-cycle stages involved. Some schizonts measured up to 640 mum. While pathological changes in some hosts were noticeable, in others no significant findings were observed. The role of endogenous stages in avian morbidity is discussed briefly.
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Neoplasia is common in pet birds, especially psittacines, and mainly involves the integument and urogenital system. Before treatment options are considered, a definitive diagnosis should be made and the extent of the disease determined. Treatment should initially be directed at tumor eradication and may involve using several modalities together or sequentially. Surgery, radiotherapy, and photodynamic therapy are used against localized tumors, while chemotherapy and biological response modification are also used against metastatic disease. In combination or adjunct therapy, surgery is used to excise or debulk the tumor, radiotherapy to sterilize local regional disease and chemotherapy and biological therapy to help prevent metastatic disease. The tumor control program should be rationally planned before application, rather than added on when one modality fails, as is commonly practiced. Tumor response to therapy should be regularly assessed both in the short and long term and wherever possible, assessment should be quantitated. Work place health and safety procedures for radiation and cytotoxic drugs should always be practiced. (C) 2004 Elsevier Inc. All rights reserved.