DSpace Communidade: Programa de Pós-Graduação em Saúde e Produção Animal na Amazônia - Belém

Acesso cirúrgico para osteossíntese diafisária de ossos longos do membro torácico de Tamandua tetradactyla.

2024-02-26T00:00:00Z

Título: Acesso cirúrgico para osteossíntese diafisária de ossos longos do membro torácico de Tamandua tetradactyla. Autor(es): COSTA, Márcia Cristina da Abstract: The reduction of habitats due to the advance of urban areas and anthropic activities has a direct impact on the reduction of wild fauna. Increasing the casuistry of traumas due to being run over, burns, hunting, dog attacks, among others. Thus, there is an increase in clinical-surgical consultations and interventions in the veterinary routine. Seven fixed specimens were used for macroscopic description of the musculature and identification of surgical approaches for diaphyseal osteosynthesis of long bones of the thoracic limb of Tamandua tetradactyla. The suggested accesses for diaphyseal osteosynthesis were: mediocranial approach to the humerus, to the radius the approach was craniolateral, in turn, to the ulna a laterocaudal intervention is indicated. Such information aims to contribute with anatomical knowledge, fundamental for the assertive choice in the clinical-surgical management of T. tetradactyla.

Identificação molecular de Bartonella spp. no tecido hepático de morcegos da Amazônia brasileira.

2025-11-25T00:00:00Z

Título: Identificação molecular de Bartonella spp. no tecido hepático de morcegos da Amazônia brasileira. Autor(es): PARDAUIL, Suellen de Oliveira Abstract: Bartonellosis is a vector-borne global zoonosis caused by Bartonella, a genus of intracellular Gram-negative bacteria. It is a re-emerging and neglected infectious disease. It infects mammals and is transmitted by arthropod vectors, causing nonspecific clinical manifestations. Several Bartonella genotypes have been identified in several wild mammal species, and bats are a significant reservoir for numerous pathogens, including Bartonella spp. They are a group of mammals with a crucial role in the origin and spread of Bartonella bacteria across geographic regions and among other mammalian groups. In bats, several arthropod taxa are found that feed on blood, which can help in the dispersion of this bacterium. Recognizing the limitations associated with the detection of Bartonella species mainly by means of a single gene and employing only one detection method, conventional PCR was implemented and two gene regions (gltA and ITS) with high specificity and sensitivity were used, allowing a reliable analysis of Bartonella diversity. The present study investigated the occurrence and molecular identity in liver samples (n = 124) of bats of 32 different species from the Amazon region. Amplification of the ITS region revealed the presence of Bartonella spp. DNA in 6 bats 4.33% (6/124) the species were Artibeus jamaicensis, Carollia brevicauda, Glossophaga soricina alopecia, Mesophylla macconnelli, Molossus molossus, Sturnira lilium and Uroderma bilobaton. Partial analysis of the gltA gene evaluated the genetic variants of Bartonella in 1 of the ITS-positive samples of the species Sturnira lilium. A prevalence rate of 5.64% (7/124) positive for Bartonella sp. was detected and showed homology with two species from Brazil and three from Guatemala. This multifaceted approach aimed to provide a more comprehensive understanding of the prevalence of Bartonella species among small mammals. Thus, a correlation was found between synanthropic behavior and the prevalence of Bartonella spp., suggesting that there is an increased risk of spillover from bats to humans in floodplain environments.

Estoques de carbono, nitrogênio e emissões de gases de efeito estufa sob diferentes condições ambientais em sistemas agropecuários na Amazônia Oriental.

2025-09-02T00:00:00Z

Título: Estoques de carbono, nitrogênio e emissões de gases de efeito estufa sob diferentes condições ambientais em sistemas agropecuários na Amazônia Oriental. Autor(es): MORAES, Lorena Maués Abstract: Land use changes in the Amazon can affect soil carbon (C) and nitrogen (N) stocks and intensify greenhouse gas (GHG) emissions. This study aimed to evaluate the effects of land use on C and N stocks and C origin, as well as the effects of land use, nitrogen fertilization, and temperature on carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O) in soils from the Eastern Amazon. The study was conducted in three municipalities in the state of Pará with different Köppen climates classifications: São Miguel do Guamá (Af), Capanema (Am), and Paragominas (Aw). Soil C and N stocks and C origin were evaluated in Af and Aw climates, while GHG emissions were quantified in incubation experiments using soils from the Am climate (land use effect) and Af climate (land use, fertilization, and temperature effects), under four land use types: forest, agriculture, intensive pasture, and nominal pasture. In the Af climate, soil C stocks ranged from 27.6 to 42.4 Mg ha−1 (0–30 cm) and from 59.4 to 75.5 Mg ha−1 (0–100cm), with no differences (p > 0.05) among land uses. For N, significantly higher stocks (p< 0.05) were observed under intensive pasture (3.2 Mg ha−1 at 30 cm and 5.3 Mg ha−1 at 100 cm). In the Aw climate, C stocks ranged from 63.9 to 77.4 Mg ha−1 (0–30cm) and from 117.1 to 134.5 Mg ha−1 (0–100cm), while N stocks ranged from 5.2 to 5.8 Mg ha−1 (0–30cm) and from 9.8 to 10.8 Mg ha−1 (0–100cm), with no differences (p > 0.05) among land uses. The δ13C isotopic analysis indicated substitution of forest-derived C by C4-C up to 60 cm in Af and up to 20cm in Aw, reflecting greater incorporation in wetter soils. In the Am climate, the highest cumulative CO2 emissions (246.0mg g−1) were recorded in the nominal pasture, while the highest N2O flux (64.3ng g−1) occurred in the intensive pasture. For CH4, all land uses acted as sinks, with greater oxidation observed in pastures (–199.7 to –249.3ng g−1) and lower oxidation in forests (–49.0 ng g−1). In Af, the highest CO2 (248.6mg g−1), N2O (175.4ng g−1), and CH4 (237.0 ng g−1) fluxes were also observed in soils under intensive pasture. Application of 180kg N ha−1 increased CO2 and N2O emissions, while CH4 showed a quadratic response, decreasing at higher doses. Temperatures of 30–35°C intensified GHG fluxes, while 45°C reduced all emissions. It is concluded that soil C and N stocks vary according to soil type, climate, and land use, and that intensive use increases GHG fluxes, with effects amplified by fertilization and temperature. Sustainable strategies, tailored to climate and soil conditions, are essential to mitigate environmental impacts on the biogeochemical functioning of Amazonian soils.

Avaliação das características reprodutivas e produtivas de ovinos da raça santa Inês, criados na mesorregião do nordeste paraense.

2025-07-09T00:00:00Z

Título: Avaliação das características reprodutivas e produtivas de ovinos da raça santa Inês, criados na mesorregião do nordeste paraense. Autor(es): SOARES, Felipe Nogueira Abstract: Santa Ines sheep may suffer physiological changes due to climate change, influencing directly in its production capacity, In order to evaluate the reproductive performance and productivity of sheep and their relation to variations in the tropical Amazon, 148 matrices were used Santa Inés crossbred pluriparous, aged 24 to 36 months with an average weight of 40,0 ± 4,93 kg and body condition score 2,5 to 3,0, which were randomly divided into four distinct groups G-1, G - 2, G -3 and G-4 and mated by natural service sires with four Santa Ines in the respective periods, January/February (G-1) April / May (G-2), July / August (G-3) and October / November (G- 4). Weights before and after the breeding season there was no difference p > 0.05 differing p <0.05 only in weight before and after birth to 40,75 ± 2,5 to 44,58 ± 6,2kg respectively. Coverage rates and cyclicity at 15 days remained constant over the four periods with an average of 100%, difference p < 0.05 at 30 and 45 days only Cyclicality of G-4 and G-5. The fertility rate of 86,6% to 91,4% In G-1 G-4 showed only a linear growth. Similar behavior was also observed for calving rate of 70% and 87,2% respectively. The mean litter size was lower to 1,0 G - 3 and at most 1,4 G - 1. For the lowest multiple gestation was 0.0% in G - 3 and 4,6% higher in G - 2. Reproductive failure showed the lowest percentage of 2,1% in Group G - 4 and the highest value of 13.3% for G - 1 while mortality was 0,0% of matrices in G-2 and 3 6,7% in G - 1. In lambs there was a higher proportion of females and 60% growth from first to fourth season on weaning rate, without significant difference (p>0.05). As for weights of lambs by sex, we observed higher weight of males over females p < 0.05 birth (3, 2 ± 0, 49 kg and 3,0 ± 0,33 kg) at 15 days (5,1 and 4.8 ± 1,01kg + 0,97kg ) and 30 days (8,1± 2,32 kg and 7,3 ± 1.94kg ) respectively. However, when analyzed between seasons, adding the weight of male and female means were different between seasons (p <0.05) with the exception of birth weight. The productivity indicators show growth in reproductive efficiency from 0,66 to 0,74, between breeding seasons with an average cycle of 0,73. In respect ky lambs/sheep parity kg from 0,24 to 0,33 kg and the ratio of lambs weaned/ewes mated kg from 0,18 to 0,29.