#61 Pomba (Zenaida macroura), cavidade oral – Qual é o seu diagnóstico? ATUALIZADO 04/12/09
Photo by AFIP
Qual é o seu diagnóstico morfológico?
Esôfago, esofagite nodular, granulomatosa, necrozante, focal, acentuada (canker).
Trichomonas gallinae é encontrada subclinicamemnte em pombas (Columba livia), mas pode se tornar pat em ogênica animais imunocomprometidos e nesse tipo de pombos (Zenaida macroura). O “canker” característico, ou placas caseosas na cavidade oral, esôfago ou papo também pode ser observada em aves que caçam ou se alimentam de aves columbiformes mortas, tais como falcões e corvos. Diagnósticos diferenciais macroscópicos para Trichomonas gallinae no esôfago e papo incluem poxvirus aviário, capilariose (capilaríase) e candidíase.
Leia mais:
1. Bunbury N, Jones CG, Greenwood AG, Bell DJ: Trichomonas gallinae in Mauritian columbids: implications for an endangered endemic. J Wildl Dis 43:399-407, 2007
2. Kocan RM, Herman CM: Trichomoniasis. In: Infectious and Parasitic Diseases of Wild Birds, eds. Davis JW, Anderson RC, Karstad L, Trainer DO, pp. 282-287. Iowa State University Press, Ames, IA, 1971
3. Lumeij JT: Gastroenterology, the esophagus and crop. In: Avian Medicine: Principles and Applications, eds. Ritchie BW, Harrison GJ, Harrison LR, pp. 491-497. Wingers Publishing Inc., Lake Worth, FL, 1994
4. Ostrand, WD, JA Bissonette, MR Conover: Trichomoniasis as a factor in mourning dove population decline in Fillmore, Utah. J Wildl Dis 31:87-89, 1995
5. Schulz, JH, AJ Bermudez, JJ Millspaugh: Monitoring presence and annual variation of trichomoniasis in mourning doves. Av Dis 49:387-389, 2005
6. Saif YM: Diseases of Poultry, 11th ed., pp. 896-898, 1006-1008, 1029-1030. Iowa State Press, Ames, Iowa, 2003
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O que você achou do diagnóstico morfológico dessa lesão? Achei um pouco difícil escrevê-la.
What I have in mind as typical for esophagitis by Trichomonas gallinae is a very necrotizing, severe and heterophilic process (that would correspond to the caseous material seen grossly) with the presence of numerous minute, tiny intralesional flagellated protozoan parasites. You included most of this information in your morphological diagnosis. Trichomoniasis is secondary to an immunosuppressive disease as you mentioned in your comments. In my experience I’ve seen necropsy cases of primary pigeon circovirus infection affecting the Bursa Fabricius and spleen, and multiple secondary opportunistic infections in the same bird such as herpevirus infection, adenovirus infection, Candida infection, Aspergillus infection, and Chlamydophilla psittaci infection. Hope this helps.