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Year 2014 - Volume 34, Number 6
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The role of immunoglobulins in nephropathy of leptospirosis in pigs, 34(6):509-514
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ABSTRACT.- Gonçalves L.M.F., Carvalho S.M., Campos A.P., Carneiro M.S., Silva E.R.D.F.S., Costa F.A.L. & Castro V. 2014. [The role of immunoglobulins in nephropathy of leptospirosis in pigs.] O papel de imunoglobulinas na nefropatia da leptospirose em suínos. Pesquisa Veterinária Brasileira 34(6):509-514. Setor de Patologia Animal, Universidade Federal do Piauí, Campus da Socopo s/n, Teresina, PI 64049-550, Brazil. E-mail: assiralm@gmail.com
Leptospirosis is an endemic worldwide anthropozoonosis, affecting humans and several species of domestic and wild animals. At the beginning of infection is the production of IgM to control the infection and after a few days, IgG is produced and cause lysis of circulating leptospires. The objective of this study was to identify deposits of immunoglobulins and antigens of leptospires in kidney tissue, to assess the role of immunoglobulins in the pathogenesis of leptospirosis nephropathy in pigs. We collected 139 blood samples and kidney of pigs from the cities of Timon/MA and Teresina/PI, to be evaluated by SAM, immunohistochemistry and PCR. Interstitial nephritis, fibrosis, vasculitis; swollen glomeruli hypercellularity and diffuse in a pig were main pathological changes found. Immunohistochemistry leptospira antigen detected in 60 pigs. Deposits of IgG, IgM and IgA were observed in the endothelium of glomerular capillaries, the capillaries intertubulares and the Bowman’s capsule, marked focal, diffuse, global and segmental. The deposition of IgM and IgA was significantly higher in infected pigs, strangely deposits of IgG was significantly higher in non-infected pigs, where there was no presence of antigen leptospires nor tubulointerstitial injury. We conclude that Leptospira antigen in porcine kidney relates to deposits of IgM and IgA but not IgG deposits. |
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