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Experimental cutaneous leishmaniasis: transmission electron microscopy of the inoculation site
Author(s) -
VASCONCELLOS CIDIA,
SOTTO MıRIAN N.
Publication year - 1997
Publication title -
international journal of experimental pathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.671
H-Index - 72
eISSN - 1365-2613
pISSN - 0959-9673
DOI - 10.1046/j.1365-2613.1997.d01-243.x
Subject(s) - amastigote , parasitism , biology , leishmania , immune system , immunology , cutaneous leishmaniasis , leishmaniasis , intracellular , parasite hosting , microbiology and biotechnology , ecology , world wide web , computer science , host (biology)
Tissue response against inoculation of Leishmania (Leishmania) amazonensis promastigotes in the hind footpad was quite different between two strains of mice: in BALB/c animals there was parasitism of perineurial cells by the 8th week post inoculation (WPI) and heavy parasitism of macrophages, as well as degenerated extracellular parasites close to collagen fibers at the 39th WPI, whereas in C57Bl/6j mice there was heavy parasitism of macrophages at 6th WPI, dermal vessels with high endothelial cell at 21st WPI and well preserved intracellular amastigote forms by 51st WPI. In both animals there was no parasitism of keratinocytes or Langerhans cells. Thus BALB/c mice were useful as an experimental model for diffuse cutaneous leishmaniasis and showing a new feature, parasitism of perineurial cells, whereas C57Bl/6j animals show hypersensitivity signs, together with a few preserved parasites, only late in the course of infection. From a morphological point of view, there were no differences in macrophages, or in the interaction between this target cell and the parasite, between the animal models studied. This suggests that the difference in the response of the hosts towards the parasite could depend on the way in which they activate a cellular, i.e. lymphocyte mediated immune, response.