Comparison of acute phase proteins in different clinical classification systems for canine leishmaniosis.

The main objective of the present study was to evaluate the acute phase protein (APP) concentrations that dogs naturally infected with Leishmania infantum show in different clinical stages of disease staged according to the Leishvet and CLWG classifications. In addition, these classifications are compared with the groups based on APP recommendations published recently. Medical records of 458 dogs with leishmaniosis whose samples were submitted to our laboratory for clinical pathology evaluation were reviewed and 77 cases met the inclusion criteria. All dogs were classified according to the CLWG system and the majority of the dogs (33.8%) were classified in stage D. Although some dogs (41.6%) could not be classified by the Leishvet system since it includes only dogs with clinical disease, most of the classified dogs (27.3%) were at Leishvet stage II. According to the APP classification, the majority of dogs (32.5%) were classified in stage 3a. Dogs in the more advanced stages of Leishvet and CWLG classifications had significant increases in serum ferritin and C-reactive protein (CRP) and decrease in Paraoxonase 1 (PON1). These findings indicate that APPs show more significant changes in the more advanced stages of Leishvet and CWLG classifications corresponding with more severe cases of canine leishmaniosis.

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