Navegando por Autor "FREITAS, Nayra Fernanda de Queiroz Ramos"

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Acesso aberto (Open Access)
Aspectos clínico-patológicos do envenenamento botrópico experimental em equinos
(2011-09) SOUSA, Melina Garcia Saraiva de; TOKARNIA, Carlos Maria Antônio Hubinger; BRITO, Marilene de Farias; REIS, Alessandra dos Santos Belo; OLIVEIRA, Carlos Magno Chaves; FREITAS, Nayra Fernanda de Queiroz Ramos; OLIVEIRA, Cairo Henrique Sousa de; BARBOSA NETO, José Diomedes
The clinical and pathological alterations in horses, experimentally inoculated with Bothropoides jararaca, Bothrops jararacussu, Bothrops moojeni and Bothropoides neuwiedi poisons, were studied with the purpose to supply subsidies for the diagnosis of the poisoning. The liofilized poisons were diluted in 1ml of physiologic solution and subcutaneously administered to six horses, at doses of 0.5 and 1mg/kg (B. jararaca), 0.8 and 1.6mg/kg (B. jararacussu), 0.205mg/kg (B. moojeni) and 1mg/kg (B. neuwiedi). All horses, less those that received the poison of B. jararacussu, died The clinical signs began between 8min and 2h10min after the inoculation. The clinical course varied, in the four cases of lethal exit, from 24h41min to 70h41min, and was 16 days in the two horses that recovered,. The clinical picture, independent of the poison type and doses, was characterized by tumefaction at the site of inoculation, dragging on the ground with the hooves of the inoculated leg, inquietude, apathy, decrease of reaction to external stimuli, pale mucous membranes and hemorrhages. Laboratory exams revealed normocytic normochrômic anemia with progressive decrease in the number of erythrocytes, of hemoglobin and of the hematocrit, and leucocytosis due to neutrophilia. There was increase of alamina aminotransferase, creatinaquinase, lactic dehydrogenase, ureia and glucose, as well increase of the time of activation of protrombin and partial tromboplastina. At postmortem examination, the main findings were extensive hemorrhagic areas in the subcutaneous tissue, with the presence of non-coagulated blood, to a large degree associataed with edema (hemorragic edema), which extended from the inoculation site of the venom to the cervical, thoraxic and scapular region, and to the leg. In the periphery of the hemorragic areas existed gelatinous edema. There were great amounts of sanguinary liquid in the thoracic, pericardic and abdominal cavities. No significant histological alterations were found.
Acesso aberto (Open Access)
Equine infectious anemia on Marajo Island at the mouth of the Amazon river
(Universidade Federal do Pará, 2015-12) FREITAS, Nayra Fernanda de Queiroz Ramos; OLIVEIRA, Carlos Magno Chaves; LEITE, Rômulo Cerqueira; REIS, Jenner Karlisson Pimenta dos; OLIVEIRA, Fernanda Gonçalves de; BOMJARDIM, Henrique dos Anjos; SALVARANI, Felipe Masiero; BARBOSA NETO, José Diomedes
Equine infectious anemia (EIA) is a transmissible and incurable disease caused by a lentivirus, the equine infectious anemia virus (EIAV). There are no reports in the literature of this infection in Equidae on Marajo Island. The objective of this study was to diagnose the disease in the municipalities of Cachoeira do Arari, Salvaterra, Santa Cruz do Arari and Soure, on Marajó Island, state of Pará, Brazil. For serological survey samples were collected from 294 horses, over 5-month-old, males and females of puruca and marajoara breeds and from some half-breeds, which were tested by immunodiffusion in Agar gel (AGID). A prevalence of 46.26% (136/294) positive cases was found. EIA is considered endemic in the municipalities studied, due to the ecology of the region with a high numbered population of bloodsucking insect vectors and the absence of official measures for the control of the disease.
Acesso aberto (Open Access)
Fatal bothropic snakebite in a horse: a case report
(2011) SILVA, Natália da Silva e; SILVEIRA, José Alcides Sarmento da; ALBERNAZ, Tatiane Teles; CAMPOS, Karinny Ferreira; OLIVEIRA, Carlos Magno Chaves; FREITAS, Nayra Fernanda de Queiroz Ramos; BOMJARDIM, Henrique dos Anjos; BARBOSA NETO, José Diomedes
The present study reports a snakebite in a horse in the state of Pará, Brazil. At initial evaluation the animal was reluctant to walk and had tachycardia, tachypnea, severe lameness, bleeding on the pastern and swelling around the left hind leg. Blood samples from the bleeding sites, took on the first day, showed leukocytosis and neutrophilia, whereas biochemical values of urea and creatinine were significantly increased. The chosen treatment was snake antivenom, fluid therapy, antibiotics, anti-inflammatory agents and diuretic drugs. On the fourth day of therapy, the hematological values were within normal parameters. There was improvement related to the clinical lameness and swelling of the limb. However, a decrease in water intake and oliguria were observed. On the seventh day the animal died. Necropsy revealed areas of hemorrhagic edema in the left hind limb and ventral abdomen; the kidneys presented equimosis in the capsule, and when cut they were wet. Moreover, the cortex was pale, slightly yellow and the medullary striae had the same aspect. Based on these data, we concluded that the snakebite in the present study was caused by Bothrops spp. and that renal failure contributed to death.
Acesso aberto (Open Access)
Lesões traumáticas de pele causadas pelos espinhos de Mimosa pudica e Mimosa debilis em equídeos
(2011-09) REIS, Alessandra dos Santos Belo; DUARTE, Marcos Dutra; SOUSA, Melina Garcia Saraiva de; FREITAS, Nayra Fernanda de Queiroz Ramos; YAMASAKI, Elise Miyuki; SILVA, André Guimarães Maciel e; OLIVEIRA, Carlos Magno Chaves; BARBOSA NETO, José Diomedes
Studies on the nature and cause of skin lesions in horses on a farm in the county of Castanhal, northeastern Para, Brazil were conducted. These were visits to the farm, epidemiological studies, blood sample collections, skin biopsies, and inspection of the pasture. The study included 25 Equidae, 14 males and 11 females, six months to eight years old. The animals showed ulcerative lesions of irregular borders on the head (nose, muzzle, upper and lower lips), in the oral cavity (buccal vestibule and gum) and on the limbs (billets, metacarpals and metatarsals and scapular-humeral joint). The histopathological examination revealed foci of cutaneous erosions with epidermal necrosis, spongiosis and vesicular degeneration of the remaining epidermis, and mild inflammatory infiltrate in the underlying dermis, consisting predominantly of macrophages and, to a lesser degree, eosinophils. The inspection of the pasture, which consisted of Brachiaria humidicola, revealed a heavy invasion by two plants provided with spines, Mimosa pudica and Mimosa debilis, of the Leguminosae Mimosoideae family. It was concluded that the skin lesions were caused by traumatic action of the spines of Mimosa pudica and Mimosa debilis.
Acesso aberto (Open Access)
Prevalência da anemia infecciosa equina na Ilha de Marajó, estado do Pará, Brasil
(Universidade Federal do Pará, 2014) FREITAS, Nayra Fernanda de Queiroz Ramos; BARBOSA NETO, José Diomedes; http://lattes.cnpq.br/1516707357889557
The aim of the study was to determine the prevalence of equine infectious anemia in the municipalities of Cachoeira do Arari, Salvaterra, Santa Cruz do Arari and Soure, in the Marajó Island, State of Pará, Brazil. For serological survey were selected 349 samples collected from June 2012 to March 2013, tested by agar gel immunodiffusion. Blood count was performed in 65 samples and biochemical examinations in 70, in which was researched urea, creatinine, aspartate aminotransferase, alanine aminotransferase, gamma glutamyl transferase, alkaline phosphatase, total bilirubin and direct bilirubin. A prevalence of 24.06% (84/349) was verified. The average number of red blood cells was significantly lower in seropositive animals in relation to the seronegative ones and there was no significant difference in mean results of hematocrit, hemoglobin, mean corpuscular volume, mean corpuscular hemoglobin concentration, platelets, in the white blood cell count, as well as in the biochemical examination. The clinical observed was poor nutritional status, apathy, pale mucous membranes, dehydration and elevation in heart and respiratory rate. At necropsy, the primary findings in all horses were jaundiced housing, small accumulation of fluid in the abdominal cavity, as well as hepatomegaly and splenomegaly. The histopathological examination showed spleen and liver with hemosiderosis. The equine infectious anemia is endemic in the cities studied.