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La pénétration du virus grippal A/Hong-Kong/1/68 (H3-N2) dans les épitheliums bronchique et alvéolaire de la souris Balb/c

Entry of influenza A/Hong-Kong/1/68 (H3-N2) virus into the bronchial and alveolar epitheliums of Balb/c Mice. Electron microscopy

Etude Ultrastructurale

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Résumé

Le présent travail étudie à l'aide du microscope électronique, et pendant une période de 37 minutes, la pénétration du virus grippal A/Hong-Kong/1/68 adapté au niveau des bronches et alvéoles de la souris. L'adsorption des virions, très rapide, intéresse surtout les cils et les cellules mucipares d'une part, les pneumocytes granuleux et les prolongements des pneumocytes membraneux dans les recoins alvéolaires d'autre part. La pénétration virale, un peu plus tardive, se produit surtout dans les cellules mucipares et les pneumocytes granuleux. Elle s'effectue, soit par capture de virions isolés dans des microvésicules, soit par phagocytose de virions multiples dans des vacuoles à contenu en général granuleux. Les virions subissent dans ces deux types de vésicules une dégradation qui atteint surtout l'enveloppe.

Summary

Attachment and entry of influenza A/Hong-Kong/1/68 (H3-N2) virus into the host cells of the bronchi and alveoli of the Balb/c mouse were followed during 37 minutes with the aid of electron microscope. Virus particles attached early to the microvilli and cilia of ciliated cells and to the mucus-secreting cells in the bronchi, and to the type II alveolar cells and the epithelial lining in the corners of the alveoli. Entry of virus occurred somewhat later, particularly into the mucus secreting cells and the type II pneumocytes, by means of single virus capturing microvesicles or of wider granular phagocytic vacuoles which contained clusters of viral particles. Viral particles seemed to undergo, in both types of vesicles, modifications which concerned particularly their envelope.

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Lemercier, G., Fontanges, R. La pénétration du virus grippal A/Hong-Kong/1/68 (H3-N2) dans les épitheliums bronchique et alvéolaire de la souris Balb/c. Archiv f Virusforschung 44, 337–349 (1974). https://doi.org/10.1007/BF01251015

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  • DOI: https://doi.org/10.1007/BF01251015

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