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• W2010024741 abstract "Human visceral leishmaniasis (VL) and canine visceral leishmaniasis (CVL) are the most important emerging diseases with high prevalence in Latin American countries and are mainly caused by Leishmania (L.) chagasi (Syn = L. infantum). CVL has a great impact on Brazilian public health because domestic dogs are the most important VL peri-domicile reservoirs in both urban and peri-urban areas. Our findings highlight the complexity of cellular immunological events related to the natural infection from dogs by L. chagasi, additionally correlating major peripheral blood phenotypic markers with clinical status and tissues parasite density. Our main results demonstrated that lower frequency of circulating B cells and monocytes are important markers of severe CVL, whereas increased levels of CD8+ lymphocytes appear to be the major phenotypic feature of asymptomatic disease. Determination of the isotypes patterns during CVL demonstrated that asymptomatic dogs and those with low parasitism are associated with an increase of IgG1, while the symptomatic dogs and those with high parasitism are associated with an increase of IgG, IgG2, IgM, IgA and IgE immunoglobulins. Pioneer findings obtained by our group showed a correlation between clinical status of CVL with degree of tissue parasite density. This data demonstrated that asymptomatic dogs presented low parasitism while symptomatic dogs are associated with high parasite load in various tissues such as skin, bone marrow and spleen. We have also investigated the association between tissue parasitism and CVL clinical forms. Regardless of clinical status, skin and spleen are the major sites of high parasite density during ongoing CVL. Furthermore, we demonstrated that bone marrow and spleen parasite density are the most reliable parasitological markers to decode the clinical status of CVL. In this article, we have reviewed some aspects of the histopathological and immunological events occurring in natural and experimental L. chagasi/L. infantum infection, pointing out the main L. chagasi-parasitized tissue. We have discussed the importance of the association between parasite density, immunological/histopathological aspects and clinical status of the CVL, their current applications, challenges for the future and potential opportunities in CVL research." @default.
• W2010024741 created "2016-06-24" @default.
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• W2010024741 date "2009-03-01" @default.
• W2010024741 modified "2023-10-14" @default.
• W2010024741 title "Systemic and compartmentalized immune response in canine visceral leishmaniasis" @default.
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• W2010024741 doi "https://doi.org/10.1016/j.vetimm.2008.10.307" @default.
• W2010024741 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/19054576" @default.
• W2010024741 hasPublicationYear "2009" @default.
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