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Lechiguana em bovinos: aspectos patogênicos

Authors: Ladeira, Silvia; Riet-Correa, Franklin; Bonel-Raposo, Josiane; Pacheco, Cléia Cardoso; Gimeno, Eduardo Juan; Portiansky, Enrique Leo;

Lechiguana em bovinos: aspectos patogênicos

Abstract

Dois bovinos foram infectados com larvas de Dermatobia hominis na região escapular esquerda, e o local de infecção de um dos bovinos foi inoculado com Mannheimia granulomatis. Aos sete, 14, 21 e 28 dias, foram feitas biópsias cirúrgicas dos locais de inoculação das larvas para posterior estudo histológico, imuno-histoquímico e avaliação por microscopia eletrônica de transmissão. No bovino infectado somente com as larvas, as lesões histológicas se caracterizaram por dermatite eosinofílica, infiltrado de células mononucleares e proliferação de tecido conjuntivo. A inoculação simultânea de Dermatobia hominis e Mannheimia granulomatis provocou adicionalmente linfangite e microabscessos eosinofílicos, similares aos observados em casos espontâneos da enfermidade. Na amostra coletada aos 28 dias após a infecção bacteriana, foi observada, tanto na imuno-histoquímica, como por meio da microscopia eletrônica, a presença de corpos bacterianos aparentemente intactos no interior de fagossomas macrofágicos, sugerindo que a bactéria permanece dentro dos macrófagos até que algum fator desconhecido desencadeie o desenvolvimento da enfermidade. A Mannheimia granulomatis foi isolada de larvas coletadas aos 42 dias após a inoculação, demonstrando que a bactéria pode sobreviver por algum tempo na larva de Dermatobia hominis. Os dados do trabalho indicam que as larvas de Dermatobia hominis podem atuar como um fator contribuinte para o desenvolvimento da paniculite fibrogranulomatosa proliferativa.

Country
Argentina
Keywords

Dermatobia, Ciencias Veterinarias, bovine, lechiguana, proliferating fibrogranulomatous panniculitis, bovinos, LECHIGUANA, Dermatobia hominis, PANICULITE FIBROGRANULOMATOSA PROLIFERATIVA, Bovinae, Mannheimia granulomatis, https://purl.org/becyt/ford/3.3, bos, https://purl.org/becyt/ford/3, paniculite fibrogranulomatosa proliferativa, Mannheimia

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    popularity
    This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
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    influence
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    impulse
    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
2
Average
Average
Average
Green
gold