André Mendes Ribeiro Corrêa

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A cross-sectional study was used to test the relationship between herd seroprevalence to Neospora caninum and various potential herd-level risk factors in 60 dairy farms located in two distinct regions in southern Brazil. Thirty farms were randomly selected from within each region. A questionnaire was designed to summarize each farm's production system as(More)
The purpose of this study was to compare histopathological changes in the lungs of chickens infected with avian pathogenic (APEC) and avian fecal (A(fecal)) Escherichia coli strains, and to analyze how the interaction of the bacteria with avian macrophages relates to the outcome of the infection. Chickens were infected intratracheally with three APEC(More)
A neurological syndrome in dairy cattle associated with consumption of moldy beer residues is described. The disease occurred on 1 farm in late June 2001, during winter. Six heifers and 1 cow out of 45 cattle were affected during a 3-week period. The affected animals died spontaneously or were euthanized approximately 2-14 days after the onset of clinical(More)
Pneumocystis spp. are fungi that are able to infect a variety of host species and, occasionally, lead to severe pneumonia. Porcine circovirus type 2 (PCV2) is an important viral pathogen which affects both swine and wild boar herds worldwide. Co-infection between PCV2 and other pathogens has been reported, and the secondary immunodeficiency caused by the(More)
Porcine circovirus 2 (PCV2) is the primary causative agent of porcine circovirus disease (PCVD). PCVD is an emerging disease that has been reported worldwide, associated with wasting, lymphoid depletion, enteritis, pneumonia, vasculitis, ischemic lesions, and necrotizing dermatitis. Although PCVD causes considerable economic losses, the pathogenesis of PCV2(More)
This communication reports a southern Brazilian outbreak of acute hepatic insufficiency in which 14 dairy animals died after consumption of Dodonea viscosa. The clinical course lasted a few hours and was characterized by apathy and staggering disorders. The main postmortem findings occurred in livers as enhanced lobular patterns and hepatocellular necrosis(More)
UNLABELLED Passiflora alata is an official species of Brazilian Pharmacopoeia and its aerial parts are used as medicinal plant by local population as well as constitutes many phytomedicines commercialized in Brazil as sedative. AIMS OF STUDY To evaluate the acute and sub-acute toxicity and genotoxicity of an aqueous spray-dried extract (PA) of Passiflora(More)
Anti-porcine circovirus type 2 (anti-PCV2) immunostaining was associated with cerebellar lymphohistiocytic vasculitis combined with hemorrhages (50 pigs) or with lymphohistiocytic meningitis (23 pigs) in pigs naturally affected with postweaning multisystemic wasting syndrome (PMWS). The animals originated from 12 farms in Rio Grande do Sul, Brazil. In(More)
Vascular disease is a major cause of morbidity and mortality among transplanted recipients and cyclosporine (CsA) treatment has been consistently implicated in this event. In this study we assessed total blood homocysteine levels (tHcy), ecto-nucleotidase activities and adenine nucleotide/nucleoside levels searching for parameters related to the mechanisms(More)