Contribuição ao diagnóstico diferencial entre Peste Suína Clássica (PSC) e Salmonelose: análise patológica revela lesões-chave para determinação etiológica

Abstract

Accuracy in the diagnosis of infectious diseases in animals might be difficult to achieve when the clinical and pathological outlines are confusing, as it happens with Classical Swine Fever (CSF) and Salmonelosis. CSF is one of the most important viral diseases with an enzootic occurrence in Brazil, while Salmonelosis is a bacterial disease that causes acute or chronic diarrhea and leads to death in several species including man. In pigs with acute developing illnesses that involves severe lesions at stomach and guts, the differential diagnosis must be made between CSF and Salmonelosis. Such differential diagnosis might be made through an association between anamnesis and a detailed clinical examination with laboratorial profiles or post mortem exam, since the two diseases can occur simultaneously and their clinical and pathological outlines are so similar which imposes a microbiology identification of the agent. In the present case, a post mortem examination was accomplished for macroscopic evaluation of lesions. Pieces of organs were collected for routine histological analysis and correlation with those lesions seen in the necropsy. Samples were collected for microbiological exams in attempt to isolate the pathogen. Considering the anatomopathological scene of lesions encountered in this swine and the suspected clinical evidence of CSF and Salmonelosis, we did proceed a detailed comparative analysis of macroscopic and histopathological findings, which in accordance with serological analyses, allowed us to conclude the diagnosis as Salmonelosis.