Navegando por Assunto "Epidemiologia veterinária"

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Afecções podais em vacas da bacia leiteira de Rondon do Pará
(2009-11) SILVEIRA, José Alcides Sarmento da; ALBERNAZ, Tatiane Teles; OLIVEIRA, Carlos Magno Chaves; DUARTE, Marcos Dutra; BARBOSA NETO, José Diomedes
Foot diseases are some of the main causes of low performance in dairy cows. In order to determine the prevalence, clinical classification and to establish the epidemio-logical factors of foot diseases in cows from basin milk of Rondon do Pará, 1,236 cows were evaluated and 275 had at least one type of foot injury. A total of 655 lesions was showed which a prevalence of 22.25%. Most frequent lesions were interdigital hyperplasia (80.92%), claw overgrowth (6.42%), and interdigital necrobacillosis (6.11%). Hind limbs were most frequently affected (61.83%), and lesions affecting the interdigital space were the most common in both the thoracic (36.34%) and hind limbs (48.09%). Epidemiological study showed that the environmental characteristics such as mountainous areas, newly formed grassland (with trunks and branches of trees), irregular ground, and mud and gravel in the floor of the pens may promote the development of foot lesions. In 95.5% of the farms, no measures had been taken for the control and prophylaxis of foot diseases. The specific clinical examination of the feet was efficient for the diagnosis.
Acesso aberto (Open Access)
Brucellosis in water buffaloes
(Universidade Federal do Pará, 2017-03) SOUSA, Melina Garcia Saraiva de; SALVARANI, Felipe Masiero; BOMJARDIM, Henrique dos Anjos; BRITO, Marilene de Farias; BARBOSA NETO, José Diomedes
The domestication of water buffaloes (Bubalus bubalis) originated in India and China and spread throughout the world and represents an important source of food of high biological value. Given the importance and relevance of brucellosis for buffalo production, this article reviews the history, etiopathogenesis, epidemiology, clinical signs, anatomopathological findings, diagnosis and control of the disease, focusing on data from studies on water buffaloes performed in different countries and the Brazilian Amazon biome.
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Detection of anti-Borrelia burgdorferi antibodies in buffaloes (Bubalus bubalis) in the state of Pará, Brazil
(Universidade Federal do Pará, 2012-09) CORRÊA, Fabíola do Nascimento; TEIXEIRA, Rafaella Câmara; OLIVEIRA, Carlos Magno Chaves; BARBOSA NETO, José Diomedes; FONSECA, Adivaldo Henrique da
This study aimed to investigate the frequency of homologous antibodies of IgG class against Borrelia burgdorferi in buffaloes in the state of Pará, Brazil. Blood serum samples from 491 buffaloes were analyzed by means of the indirect ELISA test, using crude antigen produced from a cultivar of the North American strain G39/40 of B. burgdorferi. There were 412 positive samples (83.91%), and there was no statistically significant difference in the proportions of positive animals between the 81.69% (232/284) originating from Marajó Island and the 86.96% (180/207) from the continental area of the state of Pará. In all the municipalities studied, the frequency of positive findings of antibodies against B. burgdorferi among the animals ranged from 63.6% to 92.9%. The high numbers of seropositive animals can be explained by the frequent presence of the tick Rhipicephalus (Boophilus) microplus, and by the possible existence of spirochetes of the genus Borrelia infecting buffaloes in the region studied, although specific studies are needed to confirm this relationship. These factors suggest that a cross-reaction exists between the North American strain G39/40 of B. burgdorferi, which is used as an antigenic substrate, and the species of Borrelia spp. that possibly infects buffaloes in the state of Pará.
Acesso aberto (Open Access)
Enfermidades podais em bovinos de corte criados em regime extensivo no sudeste do Estado do Pará
(Universidade Federal do Pará, 2015-05-22) SILVEIRA, José Alcides Sarmento da; BARBOSA NETO, José Diomedes; http://lattes.cnpq.br/1516707357889557
The epidemiological study was conducted in 12 properties with the history of foot diseases occurrence and the clinical examination of the affected animals for the diagnosis of foot diseases was performed only in nine of these properties. It was found on the management centers multiple risk factors for digits injuries, as syringes floors paved with rocks, working chutes with iron fittings exposure, loading ramps covered by sharp stones and the lack of maintenance and structural errors. In every farm there was an inappropriate handling of animals. In 91.7% of farms (11/12) there were pickets with trunks of trees and 66.7% (8/12) had areas of sloping relief with stones. Moreover, 16.7% (2/12) of the farms had marsh areas and wetlands. Sodomy was reported in all properties. None of the farms adopted preventive measures related to foot problems. 498 cattle between males and females were examined. The hind limbs were the most affected both in females and in males. 629 lesions were diagnosed in females. The septic pododermatitis was the most common, followed by claw deformities, pododermatitis in the paradigits and digital dermatitis. Between the examined males 285 injuries were diagnosed and the most common were septic pododermatitis, claw deformities and heel erosion. It was concluded that management errors associated with inadequate facilities were factors that contributed to the occurrence of foot diseases in beef cattle in the studied farms. The environmental characteristics favored the development of lesions; combined injuries were more prevalent than the simple ones, being diagnosed in animals in all studied farms; and the early diagnosis was not carried out in the field, which helped to increase the severity and the diversification of the diagnosed foot problems.
Acesso aberto (Open Access)
Epidemiological, clinical and pathological aspects of an outbreak of periodontitis in sheep
(Universidade Federal do Pará, 2016-11) SILVA, Natália da Silva e; SILVEIRA, José Alcides Sarmento da; LIMA, Danillo Henrique da Silva; BOMJARDIM, Henrique dos Anjos; BRITO, Marilene de Farias; BORSANELLI, Ana Carolina; DUTRA, Iveraldo dos Santos; BARBOSA NETO, José Diomedes
The objective of this study was to describe the epidemiological, clinical and pathological aspects of an outbreak of periodontitis in sheep that occurred on a rural property in Benevides, in the state of Pará, Brazil. The first clinical signs of this disease in the herd - visible nodular swollen mandible - were observed about one month after the sheep began grazing on a recently renovated Panicum maximum cv. Massai pasture; the animals were also supplemented with elephant grass (Pennisetum purpureum). From the 545 adult Santa Ines, Dorper, Texel and crossbred sheep, 20 (3.7%) showed facial bulging, particularly of the mandible. These 20 sheep, which were generally over 36 months of age, had low body condition scores as well as dull and ruffled coats; many of them had loose or missing pre, upper or lower molars, showed the formation of abscesses and fistulas, exhibited pain upon palpation and had difficulty chewing. In the same herd, the prevalence of periodontal lesions at the premolars and molar teeth was evaluated via post-mortem examination of 39 young and 17 adult sheep. In 51.3% (20/39) of adolescents and in 100% of adults, periodontal lesions were found at least at one tooth of the dental arch, with unilateral or bilateral periodontal lesions at the maxillary and mandibular teeth. Histopathological analysis of 13 sheep revealed pyogranulomatous inflammation. The second and third maxillary premolars were the teeth that were most affected in young animals, whereas the third pre-molar and the molars, of the maxilla and mandible, were most often affected in adults. These lesions led to severe bone destruction, alterations in the dental arch, occlusion, tooth loss and periodontal abscesses. The epidemiological and clinic-pathological characteristics of this periodontitis outbreak, described here for the first time in sheep in Brazil, were similar to those for bovine periodontitis (“cara inchada”).
Acesso aberto (Open Access)
Reemerging of natural infection by Trypanosoma evansi in horses in Arari, Marajó Island, Brazil
(Universidade Federal do Pará, 2016-12) SILVA, Josileide Araújo da; DOMICIANO, Tarcísio Oliveira; MONTÃO, Daniele Pina; SOUSA, Paulo Geovani Silva; RAMOS, Leandro Lopes; PAREDES, Laura Jamille Argolo; GONZALEZ MONTEIRO, Silvia; RIVERO, Beatriz Riet Correa; SCOFIELD, Alessandra; BEZERRA JÚNIOR, Pedro; BEZERRA, Isis Abel; CERQUEIRA, Valíria Duarte
Two outbreaks of trypanosomiasis by Trypanosoma evansi in horses in the municipality of Chaves, Marajó Island, Pará State, Brazil are reported. The first outbreak occurred in April 2011 in a farm with 147 horses; of these, 47 (31.97%) got sick, and 40 (27.21%) died. The second outbreak occurred in May 2012 and involved nine properties. Of a total of 679 horses, 209 (30.07%) got sick, and 183 (26.97%) died. The main clinical signs observed in these horses were weight loss, abdominal edema, toe dragging, and pelvic muscle atrophy. Necropsy was performed in two horses, one from each outbreak. Macroscopic alterations were not seen in the horse from the first outbreak; however, the horse from the second outbreak exhibited emaciation, pallor and icterus, as well as enlarged spleen with prominent white pulp at cut surface. Histopathology of the central nervous system of both animals revealed mild to severe, diffuse lymphoplasmacytic encephalitis, with presence of Mott cells. Immunohistochemistry for T. evansi revealed structures similar to intralesional trypomastigote forms. Between November and December of 2013, an epidemiological survey was carried out in the municipalities of Cachoeira do Arari, Santa Cruz do Arari, Salvaterra, Soure, and Chaves. Only Santa Cruz do Arari and Chaves had reported cases of the disease. Blood samples were collected from 243 horses for detection of T. evansi DNA by polymerase chain reaction (PCR) and 20 were positive.