Resultado da pesquisa (5)
Termo utilizado na pesquisa doenças de aves
#1 - Cutaneous fungal infections secondary to avian pox in Northeast Brazil
Abstract in English:
This study describes the epidemiological and clinical-pathological aspects of outbreaks of avian pox diagnosed in poultry associated with fungal co-infections. A retrospective study was carried out, and cases of avian pox with suspected associated fungal infection were selected. The slides were subjected to routine and special histochemical staining in cases of suspected fungal infection, in addition to performing the immunohistochemical technique. Macroscopically, there were nodular lesions with crust formation, and histologically, the lesions were characterized by hyperplasia of the spinous layer associated with multiple eosinophilic intracytoplasmic inclusions. In seven cases, morphologically compatible structures with fungi were verified through black impregnation with GMS and strongly stained in pink with PAS. The morphotintorial aspects were suggestive of fungi belonging to the genus Aspergillus sp. and Candida sp. The diagnosis of fungal co-infections was confirmed through immunohistochemistry, with positive immunostaining for fungi of the genus Aspergillus sp. (five cases) and Candida sp. (two cases). It is concluded that the occurrence of fungal co-infections secondary to the cutaneous lesions of avian pox represents a complicating factor of the disease, favoring the weakness of these animals and death. Therefore, the investigation of associated secondary agents is necessary.
Abstract in Portuguese:
Este artigo descreve os aspectos epidemiológicos e clínico-patológicos de surtos de varíola aviária diagnosticada em aves domésticas associados a coinfecções fúngicas. Foi realizado um estudo retrospectivo e selecionados os casos de varíola aviária com suspeita de infecção fúngica associada. As lâminas foram submetidas às colorações histoquímicas de rotina e especiais, nos casos de suspeita de infecção fúngica, além de realização da técnica de imuno-histoquímica. Macroscopicamente, haviam lesões nodulares com formação de crostas, e histologicamente, as lesões caracterizavam-se por hiperplasia da camada espinhosa associada a múltiplas inclusões intracitoplasmáticas eosinofílicas. Em sete casos verificou-se a presença de estruturas morfologicamente compatíveis com fungos, através de impregnação em preto por GMS e coradas fortemente em rosa por PAS. Os aspectos morfotintoriais foram sugestivos de fungos pertencentes aos gêneros Aspergillus sp. e Candida sp. O diagnóstico das coinfecções fúngicas foi confirmado através da imuno-histoquímica, com imunomarcação positiva para fungos dos gêneros Aspergillus sp. (cinco casos) e Candida sp. (dois casos). Através desses dados, pode-se concluir que a ocorrência de coinfecções fúngicas secundárias às lesões cutâneas de varíola aviária representam um fator complicador da doença, favorecendo a debilidade desses animais e óbito. Sendo assim, é necessária a investigação de agentes secundários associados.
#2 - Pathological, microbiological and immunohistochemical characterization of avian colibacillosis in broiler chickens of Mozambique
Abstract in English:
Avian colibacillosis is an acute and globally occurring infectious disease of domestic and wild birds caused by Escherichia coli, and it is associated with considerable economic losses mainly due to the morbidity and mortality associated. The present study aimed to describe the pathological, bacteriological and immunohistochemical aspects of avian colibacillosis in broiler chickens of Mozambique. Forty-nine broiler chicken presented anorexia, decreased weight gain, ataxia, diarrhea, dyspnea, and death in a clinical course of 3-5 days. The birds were raised in five farms (small, medium and large farms) with manual and automatic breeding system, with flocks ranging from 100 to 20,000 birds. At the necropsy, all birds had poor body condition, and the pericardium and the Glisson’s capsule of all avian exhibited different degrees of adherence often associated with severe fibrin deposition. The thoracic and abdominal air sacs were thickened and adhered to the costal wall. Mild, moderate or marked hepatomegaly associated with white pinpoint multifocal areas (100%, 49/49) and mild to moderate splenomegaly in 75.5% (37/49) with a mottled surface were observed. The lungs and kidney were enlarged and reddish. Histologically, a multiorgan fibrinoheterophilic polyserositis was observed in 75.5% of the cases (37/49), which were characterized by inflammatory infiltrates composed mainly of degenerative heterophils, macrophages and plasma cells, associated with fibrin deposits and intermixed by coccobacillary bacterial basophilic aggregates. These affected mainly the pericardium (28.6%, 14/49), the pleura (18.4%, 9/49), the Glisson’s capsule (10.2%, 5/49), the ventriculus (10.2, 5/33), and the proventriculus (8.2%, 4/49) serosa. Multifocal to coalescing areas of coagulative necrosis associated with similar inflammatory cells were observed mainly in the spleen (28.6%, 14/49), liver (24.5%, 12/49), and intestines (22.4%, 11/49). A similar infiltrate was also observed affecting the the lungs (16.3%, 8/49), the kidney (16.3%, 8/49) and the myocardium (14.3%, 7/49). Isolation and identification of E. coli was obtained in 12 cases through bacterial culture. Some organs (2 cases of each farms) were selected and submitted to immunohistochemistry anti-E. coli, and a positive stain was observed in all tested cases in liver (3/3), heart (4/4), spleen (1/1), lungs (4/4), intestines (4/4), bursa of Fabricius (1/1), ventriculus (1/1), and proventriculus (1/1) tissue sections. These results demonstrate that E. coli was the cause of mortality in these birds. Therefore, biosecurity and management measures should be employed to prevent and control the disease occurrence in Mozambique’s poultry farming.
Abstract in Portuguese:
A colibacilose aviária é uma doença aguda de ocorrência mundial que acomete aves domésticas e silvestres, causada por Escherichia coli e resulta em perdas econômicas consideráveis devido à elevada morbidade e mortalidade das aves. O presente estudo teve o objetivo de descrever os aspectos patológicos, bacteriológicos e imuno-histoquímicos de colibacilose aviária em frangos de corte de Moçambique. Um total de 49 frangos de corte apresentaram anorexia, baixo ganho de peso, ataxia, diarreia, dispneia e morte em um curso clínico de 3 a 5 dias. As aves eram provenientes de 5 granjas (pequenas, média e grandes), com sistema de criação manual e automático, com rebanhos que variavam de 100 a 20.000 aves. À necropsia, todas as aves exibiam condição corporal ruim a caquética, além de pericárdio e cápsula de Glisson de todas aves (100%; n=49) com diferentes graus de aderência e deposição de fibrina de forma difusa acentuada. Os sacos aéreos torácicos e abdominais estavam espessados e aderidos à parede costal. Foi observado ainda hepatomegalia discreta, moderada a severa frequentemente associada com áreas multifocais puntiformes brancacentas (100%; 49/49), e esplenomegalia discreta a moderada, associado a áreas multifocais moteadas (75,5%; 37/49). Os pulmões e rins estavam aumentados e com coloração avermelhada. Histologicamente, observou-se majoritariamente serosite fibrinoheterofílica em 75,5% dos casos (37/49), caracterizadas por infiltrado inflamatório composto por heterófilos degenerados, macrófagos, linfócitos e plasmócitos, com deposição de fibrina entremeada por uma miríade de estruturas bacterianas cocobacilares. Esta lesão foi observada principalmente em pericárdio (28,6%; 14/49), pleura (18,4%; 9/49), cápsula de Glisson (10,2%; 5/49), ventrículo (10,2; 5/33) e em proventrículo (8,2%; 4/49). Áreas multifocais a coalescentes de necrose de coagulação associada a infiltrado inflamatório semelhante ao descrito foi observado principalmente no baço (28,6%; 14/49), fígado (24.5%; 12/49), e intestinos (8,2%; 4/49). Um infiltrado inflamatório semelhante também foi visualizado em pulmões (16,3%; 8/49), rins (16,3%; 8/49) e miocárdio (14,3%; 7/49), Colônias puras de E. coli foram identificadas e isoladas em 12 casos. Alguns órgãos (2 de cada granja) foram submetidos ao exame imuno-histoquímico anti-E. coli e marcação positiva foi visualizada em todos casos testados, como em fígado (3/3), coração (4/4), baço (1/1), pulmão (4/4), intestinos (4/4), bursa de Fabricius (1/1), rim (1/1), ventrículo (1/1) e proventrículo (1/1). Estes resultados demonstram que E. coli foi a causa de morte destas aves. Sendo assim, a adoção de boas medidas de biosseguridade e de manejo são indispensáveis para a prevenção e controle da ocorrência da doença nas granjas de frango de corte de Moçambique.
#3 - Diseases of wild birds in southern Rio Grande do Sul, Brazil
Abstract in English:
Necropsy protocols of the “Laboratório Regional de Diagnóstico” of “Faculdade de Veterinária” of the “Universidade Federal de Pelotas” were reviewed, ranging the period from 2000 to 2018. Three hundred eighty one necropsies, 25 refrigerated and/or formaline fixed organs, and seven biopsies were received, representing 413 samples. Most of these materials were sent by the “Núcleo de Reabilitação da Fauna Silvestre” of “Universidade Federal de Pelotas” (NURFS‑CETAS-UFPel) and were from municipalities within the range area of LRD-UFPel influence. Of the 413 cases 55 (13.31%) corresponded to metabolic/nutritional diseases; 50 (12.10%) to trauma; 35 (8.47%) to bacterial diseases/toxi-infections; 30 (7.26%) to parasitic diseases; 28 (6.77%) to fungal diseases; four (0.97%) to viral diseases and 17 (4.11%) to other diseases. Cases where it was not possible to determine the etiology, were in severe autolysis or were inconclusive totaled 194 (46.97%). Metabolic/nutritional diseases and traumatic injuries were the main cause of death in wild birds’, being Passeriformes the most affected order.
Abstract in Portuguese:
Foi realizado um estudo retrospectivo dos diagnósticos de causas de morte e de lesões em aves silvestres na região Sul do Rio Grande do Sul de 2000 a 2018. Foram revisados os protocolos de necropsia e materiais de aves silvestres encaminhados ao Laboratório Regional de Diagnóstico da Faculdade de Veterinária da Universidade Federal de Pelotas no período. Foram recebidos 381 cadáveres para necropsia, 25 órgãos refrigerados e/ou em formol e 7 biopsias, totalizando 413 materiais. A maioria desses materiais foi remetida pelo Núcleo de Reabilitação da Fauna Silvestre da Universidade Federal de Pelotas (NURFS-CETAS-UFPel) e provenientes de municípios da área de influência do LRD‑UFPel. Dos 413 casos 55 (13,31%) corresponderam a doenças metabólicas/nutricionais; 50 (12,10%) a traumas; 35 (8,47%) a doenças bacterianas/toxi-infecções; 30 (7,26%) a doenças parasitárias; 28 (6,77%) doenças fúngicas; 4 (0,97%) doenças virais e 17(4,12%) outras doenças que não se encaixavam nas categorias. Ainda em nos casos em que não foi possível determinar a etiologia, apresentaram autólise acentuada ou foram inconclusivos somaram 194 (46,97%). As doenças metabólicas/nutricionais e lesões traumáticas foram as principais causas de morte de aves silvestres, sendo a ordem mais afetada a Passeriformes.
#4 - Causes of mortality of seabirds stranded at the Northeastern coast of Brazil
Abstract in English:
The aim of this work was to determine the main species of stranded seabirds at the Northeastern coast of Brazil in addition to the most frequent causes of stranding and mortality. The study was conducted in a monitored area for three years (2012-2014), from the coastline of south Alagoas through north coast of Bahia encompassing 254km of coast. The seabirds found alive during the monitoring were sent to rehabilitation, clinically examined and the carcasses were removed, necropsied and histopathologically analyzed. A total of 1.347 seabirds were found stranded. Of these, 378 were found alive and sent to rehabilitation. From the 969 dead seabirds 806 were unsuitable for necropsy, being only 163 submitted to necropsy and histopathological analysis. Calonectris borealis, Puffinus gravis and Puffinus puffinus were the main seabirds stranded in the studied area. Most stranding occurred from March to June with an increase during April and May for the most species of seabirds. The main clinical signs of stranded seabirds consisted of inappetence, apathy, low body score, hypothermia, flying or movement difficulty and prolonged recumbency. Natural causes followed by infectious diseases and anthropogenic environmental factors were the main causes of death of seabirds stranded on the Northeastern coast of Brazil.
Abstract in Portuguese:
O objetivo deste trabalho foi determinar as principais espécies de aves marinhas encalhadas na costa do Nordeste do Brasil, bem como as mais frequentes causas de encalhe e mortalidade. O estudo foi desenvolvido em área monitorada durante três anos (2012-2014), entre o litoral sul de Alagoas e o litoral norte da Bahia, perfazendo um total de 254km de extensão da costa. As aves encontradas vivas foram encaminhadas para reabilitação e examinadas clinicamente; as carcaças foram removidas, necropsiadas e os órgãos foram analisados por meio da histopatologia. Um total de 1.347 aves foi encontrado, encalhadas. Dessas, 378 estavam vivas e foram encaminhadas para a reabilitação. Das 969 aves marinhas mortas, 806 estavam impróprias para realização de necropsia, sendo apenas 163 submetidas à necropsia e análise histopatológica. Calonectris borealis, Puffinus gravis e Puffinus puffinus foram as principais espécies encontradas na área estudada. A maioria dos encalhes para grande parte das aves marinhas ocorreram de março a junho, com um aumento durante abril e maio. Os principais sinais clínicos das aves marinhas consistiram em inapetência, apatia, baixo escore corporal, hipotermia, dificuldade de voo ou movimento e decúbito prolongado. Causas naturais, seguidas de doenças infecciosas e fatores antropogênicos, foram as principais causas de mortes de aves marinhas encalhadas na costa do Nordeste do Brasil.
#5 - Doenças de aves selvagens diagnosticadas na Universidade Federal do Paraná (2003-2007), p.565-570
Abstract in English:
ABSTRACT.- Santos G.C., Matuella G.A., Coraiola A.M., Silva L.C., Lange R.R. & Santin E. 2008. [Diseases of wild birds diagnosed at the Federal University of Paraná, Brazil (2003-2007).] Doenças de aves selvagens diagnosticadas na Universidade Federal do Paraná (2003-2007). Pesquisa Veterinária Brasileira 28(11):565-570. Departamento de Medicina Veterinária, Campus do Setor de Ciências Agrárias, Universidade Federal do Paraná, Curitiba, PR 80035-050, Brazil. E-mail: santin@ufpr.br
From 253 wild birds attended at the Wild Animal Ambulatory of the Veterinary Hospital, Paraná Federal University, between August 2003 and August 2006, 45 cases (17.8%) were related to the species Serinus canarius (Belgian Canary). Within these attended birds and its respective orders, most morbid conditions occurred with the Psittaciforme order and were caused by traumatism, in 45 cases (14.32%). Of these, 17 animals (30.91%) had bone fractures; the most common were on radius-ulna (17.65%). Other conditions were presence of ectoparasites (12.50%) and endoparasites (10.68%), respiratory disease (10.42%), dermatological ailments (6.51%), neoplasms (4.95%), ophthalmic illnesses (4.43%), gastrointestinal diseases (3.91%), cachexia (3.39%), neurological diseases (2.86%), self-mutilation (2.86%), obesity (2.34%), aggression by other animals (1.56%), nutritional deficiencies (1.30%), egg retention (1.04%), avian poxvirus (0.78%) and uric gout (0.52%), as well as there was clinical routine measures to be taken (7.55%). Traumas and illnesses were observed as the highest prevalence on the casuistic, which could be prevented by correct husbandry practices.
Abstract in Portuguese:
ABSTRACT.- Santos G.C., Matuella G.A., Coraiola A.M., Silva L.C., Lange R.R. & Santin E. 2008. [Diseases of wild birds diagnosed at the Federal University of Paraná, Brazil (2003-2007).] Doenças de aves selvagens diagnosticadas na Universidade Federal do Paraná (2003-2007). Pesquisa Veterinária Brasileira 28(11):565-570. Departamento de Medicina Veterinária, Campus do Setor de Ciências Agrárias, Universidade Federal do Paraná, Curitiba, PR 80035-050, Brazil. E-mail: santin@ufpr.br
From 253 wild birds attended at the Wild Animal Ambulatory of the Veterinary Hospital, Paraná Federal University, between August 2003 and August 2006, 45 cases (17.8%) were related to the species Serinus canarius (Belgian Canary). Within these attended birds and its respective orders, most morbid conditions occurred with the Psittaciforme order and were caused by traumatism, in 45 cases (14.32%). Of these, 17 animals (30.91%) had bone fractures; the most common were on radius-ulna (17.65%). Other conditions were presence of ectoparasites (12.50%) and endoparasites (10.68%), respiratory disease (10.42%), dermatological ailments (6.51%), neoplasms (4.95%), ophthalmic illnesses (4.43%), gastrointestinal diseases (3.91%), cachexia (3.39%), neurological diseases (2.86%), self-mutilation (2.86%), obesity (2.34%), aggression by other animals (1.56%), nutritional deficiencies (1.30%), egg retention (1.04%), avian poxvirus (0.78%) and uric gout (0.52%), as well as there was clinical routine measures to be taken (7.55%). Traumas and illnesses were observed as the highest prevalence on the casuistic, which could be prevented by correct husbandry practices.
