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Interstitial pneumonitis induced in guinea pigs by Triatoma infestans antigens

Alonso, A.; Caccuri, R.L.; Scavini, L.M.; Rodríguez, S.M.; Marino, G.A.

Journal of Investigational Allergology and Clinical Immunology 4(4): 197-202

1994

ISSN/ISBN: 1018-9068
PMID: 7850034
Document Number: 436999
Data concerning the experimental induction of hypersensitivity pneumonitis in guinea pigs with a Triatoma infestans antigen are presented. Glycoproteins obtained from the chitinous structures of T. infestans (79 kd + 11 kd) were aerosolized daily to guinea pigs during 7 weeks. The presence of specific antibodies (IgG and IgE) was detected by serological techniques; histopathological studies of the lungs showed interstitial infiltrates of macrophages and T-cells. Single non-necrotizing granulomas were seen at the seventh week of the experiment. The results from this animal model suggest that this hypersensitivity pneumonitis is a typical delayed-type reaction due to chronic contact with the heterologous glycoproteins of T. infestans.

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