Authors: Letícia Maria Gráballos Ferraz Hebling Karim Christina Scopinho Furquim Gervásio Henrique Bechara Maria Izabel CamargoMathias
Publish Date: 2012/11/15
Volume: 112, Issue: 2, Pages: 577-584
Abstract
This study analyzed the histopathology of rabbit skin previously immunized with SGE2 SGE4 and SGE6 gland extracts prepared from salivary glands of Rhipicephalus sanguineus female with 2 4 and 6 days of feeding at the region of the R sanguineus female feeding lesion 2 4 and 6 days after tick attachment In this work infestationnaïve New Zealand White rabbits were inoculated either with the extracts test group TG or with phosphate buffer and complete Freund’s adjuvant mixture control group 2 CG2 Each extractinoculated TG and CG2 and noninoculated CG1 rabbit was subsequently infested with R sanguineus Skin biopsies were collected from the rabbit at the tick feeding lesion at 2 4 and 6 days of feeding Results revealed that rabbit immunization with gland extracts induced acquisition of resistance against this species It should be stated that the SGE4 extract was the most effective in developing an immune–inflammatory response against ectoparasites being this process characterized by the presence of an early and intense inflammatory cell infiltrate On the other hand SGE6 extract caused a later appearance of resistance with less infiltrate occurrence and intense edema at the feeding lesion site As to the inflammatory process deriving from SGE2 extract inoculation it was the less intense It was concluded that immunization with different extracts from R sanguineus female salivary glands did not change microscope features of the inflammatory process although an earlier or more intense and later response which was also dependent on the inoculate extract was noticed
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