Summary
An intradermal skin test, to demonstrate a delayed cutaneous hypersensitivity reaction inBabesia equi infection in donkeys, was developed. A skin reaction toB. equi antigen was elicited in vaccinated, infected and carrier intact and splenectomised donkeys. The histopathological examination of the skin biopsy revealed infiltration of mononuclear cells and accumulation of oedematous fluid in the deeper layers of the dermis.
A leucocyte migration inhibition test was developed and its specificity as anin vitro measure of cell-mediated immunity toB. equi antigen was established. The results of this study demonstrated a correlation between cell-mediated immunity and protection.
Résumé
Un test intradermique a été mis au point pour démontrer une réaction d'hypersensibilité retardée chez des ânes infectés parBabesia equi. Cette réaction cutanée à l'antigène spécifique deB. equi a été mise en évidence chez des ânes vaccinés, infectés, porteurs inapparents et splénectomisés.
L'examen histo-pathologique des biopsies de peau a révélé une infiltration par des cellules mononucléées et une accumulation de liquide d'oedème dans les couches profondes du derme.
Un test d'inhibition de la migration des leucocytes a été mis au point et sa spécificité établie comme moyen d'apprécierin vitro cette immunité cellulaire.
Les résultats de cette étude ont montré une corrélation entre l'immunité à médiation cellulaire et la protection.
Resumen
Se desarrolló una prueba intradérmica en asnos para demostrar la hipersensibilidad cutánea retardada en infecciones porBabesua equi. Se observó reacción cutánea a la inoculación de antígeno deB. equi en asnos vacunados, infectados y portadores intactos y esplenectomizados. El examen histológico de biopsias de piel reveló infiltración de células mononucleares y acumulación de fluido edematoso en las capas profundas de la dermis.
Se desarrolló una prueba de inhibición migratoria de leucocitos y se comprobó su especificidad como una medidain vitro de la inmunorreacción celular-indirecta al antígeno deB. equi. Los resultados de este experimento demonstraron una correlación entre inmunorreacción celular-indirecta y protección.
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Banerjee, D.P., Singh, B., Gautam, O.P. et al. Cell-mediated immune response in equine babesiosis. Trop Anim Health Prod 9, 153–158 (1977). https://doi.org/10.1007/BF02236589
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DOI: https://doi.org/10.1007/BF02236589