Estudo clínico-citológico e da ativação de neutrófilos sanguíneos e do lavado traqueobrônquico de ovinos clinicamente sadios e portadores de broncopneumonia
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Data
2012-12-10
Autores
Martins, Mayra Teixeira Alas [UNESP]
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Editor
Universidade Estadual Paulista (Unesp)
Resumo
Os ovinos são muito susceptíveis às doenças pulmonares, sendo a broncopneumonia mais frequente e responsável por desencadear intensa resposta inflamatória, sistêmica e local, principalmente neutrofílica. O objetivo deste estudo foi analisar a resposta inflamatória sistêmica e pulmonar de ovinos portadores de broncopneumonia moderada e grave e as atividades neutrofílicas através dos testes estimulado (NBT-E) ou não (NBT-NE), com Tetrazólio Nitroazul, no sangue periférico e no lavado traqueobrônquico. Para isso, por exame clínico, 50 ovinos foram selecionados e subdivididos em três grupos: G1 – animais sadios (n=19); G2 – portadores de broncopneumonia moderada (n=21); e G3 – portadores de broncopneumonia grave (n=10). A resposta inflamatória sistêmica foi avaliada pela interpretação do exame físico, leucograma e fibrinogênio plasmático. A resposta inflamatória local, por sua vez, pela associação das alterações respiratórias ao exame físico específico e à celularidade do lavado traqueobrônquico (LTB). A atividade dos neutrófilos sanguíneos dos grupos G1 e G2 foi percentualmente semelhante e a daqueles do LTB nula. O G3 apresentou diminuição da porcentagem de neutrófilos sanguíneos ativados e atividade de NBT significativa dessas células no LTB. Nestas condições experimentais, os resultados demonstraram que o exame clínico minucioso e a associação dos sinais clínicos são fidedignos para a graduação dos estágios da broncopneumonia; a gravidade das respostas inflamatórias, sistêmica e local, é dependente do grau de comprometimento pulmonar e há tendência à leucocitose neutrofílica e ao aumento do número de células nucleadas no LTB conforme a gravidade da doença; há redução do número de neutrófilos ativos circulantes e presença destes no LTB nas broncopneumonias graves
Ovine are highly susceptible to lung diseases, being bronchopneumonia the most frequent and responsible for triggering intense inflammatory response, systemic and local, mainly neutrophilic. The aim of this study was analyze lung and systemic inflammation of moderate and severe bronchopneumonia affected ovine and the neutrophilic activity through stimulated (S-NBT) and not stimulated (NS-NBT) assays with Nitroblue Tetrazolium, on peripheral blood and on tracheobronchial lavage (TBL). For that, 50 animals were selected and divided based on clinical examination into three groups: G1 – healthy animals (n=19), G2 – moderate bronchopneumonia (n=21), and G3 – severe bronchopneumonia (n=10). The systemic inflammation was evaluated by the interpretation of physics parameters, white blood cells (WBC) counts and plasma fibrinogen. The local inflammatory response, in turn, by the association of respiratory abnormalities on physical examination and the TBL cellularity. The systemic neutrophils activity from G1 and G2 were similar, and the lung neutrophils activity was null. The G3 showed a reduction of the activated systemic neutrophils rate, and expressive activity of these cells on the TBL. On these experimental conditions the results showed that a detailed clinical examination associated with the clinical signs is a reliable method for the graduation of the bronchopneumonia severity; the gravity of the local and systemic inflammation relies on the lung commitment degree and there is a tendency to neutrophilic leukocytosis and increase of the nucleated cells number on the TBL, associated with the illness severity; there is a reduction of active circulating neutrophils and its presence on the TBL when the animal is stricken by severe bronchopneumonia
Ovine are highly susceptible to lung diseases, being bronchopneumonia the most frequent and responsible for triggering intense inflammatory response, systemic and local, mainly neutrophilic. The aim of this study was analyze lung and systemic inflammation of moderate and severe bronchopneumonia affected ovine and the neutrophilic activity through stimulated (S-NBT) and not stimulated (NS-NBT) assays with Nitroblue Tetrazolium, on peripheral blood and on tracheobronchial lavage (TBL). For that, 50 animals were selected and divided based on clinical examination into three groups: G1 – healthy animals (n=19), G2 – moderate bronchopneumonia (n=21), and G3 – severe bronchopneumonia (n=10). The systemic inflammation was evaluated by the interpretation of physics parameters, white blood cells (WBC) counts and plasma fibrinogen. The local inflammatory response, in turn, by the association of respiratory abnormalities on physical examination and the TBL cellularity. The systemic neutrophils activity from G1 and G2 were similar, and the lung neutrophils activity was null. The G3 showed a reduction of the activated systemic neutrophils rate, and expressive activity of these cells on the TBL. On these experimental conditions the results showed that a detailed clinical examination associated with the clinical signs is a reliable method for the graduation of the bronchopneumonia severity; the gravity of the local and systemic inflammation relies on the lung commitment degree and there is a tendency to neutrophilic leukocytosis and increase of the nucleated cells number on the TBL, associated with the illness severity; there is a reduction of active circulating neutrophils and its presence on the TBL when the animal is stricken by severe bronchopneumonia
Descrição
Palavras-chave
Ovinos - Aparelho respiratório, Pulmões - Doenças, Pneumonia, Neutrofilos, Traqueia - Secreções, Bronquios - Secreções, Lungs - Diseases
Como citar
MARTINS, Mayra Teixeira Alas. Estudo clínico-citológico e da ativação de neutrófilos sanguíneos e do lavado traqueobrônquico de ovinos clinicamente sadios e portadores de broncopneumonia. 2012. 111 f. Dissertação (mestrado) - Universidade Estadual Paulista Julio de Mesquita Filho, Faculdade de Medicina Veterinária e Zootecnia, 2012.