Histomoníase em pavão (Pavo cristatus) no semiárido potiguar
Sousa, Ana Caroline Freitas Caetano deOliveira, Gabriela Rebouças deAraújo Júnior, Hélio Noberto dePrazeres Júnior, Fabiano RochaSantos, Caio SérgioFeijó, Francisco Marlon CarneiroFreitas, Carlos Iberê AlvesBraga, Juliana Fortes Vilarinho
Background: Histomoniasis is a disease caused by Histomonas meleagridis, a flagellated protozoan that can cause severenecrotizing hepatitis and typhlitis in several bird species. The disease has a cosmopolitan distribution. In experimentalinfection, peacocks (Pavo spp.) showed susceptibility to histomoniasis, however there are few reports on natural histomoniasis in this species. In northeastern Brazil, reports about its occurrence in avian species are scarce and nonexistent inpeacocks. Therefore, this report aims to describe the epidemiological and clinicopathological aspects of a histomoniasiscase in a peacock (Pavo cristatus) in the Brazilian semiarid region.Case: A 3-month-old male peacock with a history of apathy and anorexia was attended in the Veterinary Hospital of theUniversidade Federal Rural do Semi-Árido (UFERSA), Mossoró, RN, Brazil. The animal was raised extensively in a farmwithout basic sanitary measures, also with a history of living with animals of different species. After clinical examination, inwhich intense apathy and weight loss were confirmed, the bird was submitted to emergency therapeutic measures, howeverthere was no clinical improvement and the bird died. At necropsy, intense diffuse bilateral necrotizing typhlitis and multifocalto coalescent necrotizing hepatitis were observed. Fragments of the organs were collected in 10% neutral buffered formalinfor histopathological analysis and cecal content were collected for microbiological analysis. Histopathology of the cecumrevealed transmural necrotizing typhlitis associated with myriads of trophozoites morphologically compatible with Histomonasmeleagridis. The same microorganisms were observed in association with necrotizing hepatitis lesions, which allowed thediagnosis of histomoniasis. Also, the bacterium Pantoea agglomerans was isolated from the cecal content...(AU)
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