Browsing by Author "Lacasta, Delia"
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- Anaemia in ruminants caused by plant consumptionPublication . Ruiz, Héctor; Lacasta, Delia; Ramos, Juan Jose; Quintas, Helder; Arcaute, Marta Ruiz de; Ramo, Maria Angeles; Villanueva-Saz, Sergio; Ferrer, Luis MiguelPlant toxicology has affected animals throughout evolution. Plants have adapted themselves to the environment. This adaptation has led to the development of defensive strategies to avoid being consumed. Plants have several chemical compounds, which can cause deleterious effects on people or animals that consume them, causing a wide variety of clinical signs. Plants from various latitudes, both cultivated for human and animal feeding or decorative purpose and even wild growth plants are able to generate anaemia in ruminants. Coumarins or ptaquiloside predispose bleeding and haemorrhages, causing a haemorrhagic disease in affected animals. In this group, some important fodder plants, such sweet clover (Genus Melilotus spp.), or other weeds distributed worldwide, such as bracken fern (Pteridium aquilinum) of giant fennel (Ferula communis), are included. On the other hand, sulfur-containing chemicals (e.g., n-propyl disulfate and S-propyl cysteine sulfoxides (SMCOs)) may cause severe direct damage to the erythrocyte and their membrane, leading to their destruction and causing haemolytic anaemia in the animal. This review presents the most frequent intoxication by plants causing anaemia in ruminants. Toxic compounds, clinical signs, diagnosis and possible treatments are also presented.
- Anemia en rumiantes por consumo de plantas tóxicasPublication . Ferrer, Luis Miguel; Ramos, Juan Jose; Lacasta, Delia; Ruiz, Héctor; Aguiar, Carlos; Quintas, HelderLa anemia en pequeños rumiantes es una reducción de la masa de células rojas sanguíneas, caracterizada por la disminución del número de glóbulos rojos circulantes, de la hemoglobina y del valor hematocrito. Consecuentemente, se produce una reducción de la capacidad del transporte de oxígeno. Es la alteración hemática más frecuente y, generalmente, es secundaria a otros procesos.
- Artificial insemination with two different vaginoscopes of Churra Galega Bragançana ewesPublication . Quintas, Helder; Silva, Luis; Mateus, Óscar; Ramos, Juan Jose; Ferrer, Luis Miguel; Correia, Teresa Montenegro; Lacasta, Delia; Valentim, RamiroThe main goal of this paper was to compare the efficiency of two speculums in the AI of Portuguese Churra Galega Bragançana (CGB) ewes. This study was performed at Braganza (latitude 41° 48’ 33’’N, longitude 6° 44’ 3’’W, and Altitude 670 meters) between April 1st and June 5th. Forty-nine CGB ewes aged between 2 to 8 years were used. Body condition was scored according to the Australian classification table. On April 12th ewes estrous was synchronized by long-term FGA (20 mg) or CIDR (0.35 g) treatments and the injection of 500 UI of eCG at vaginal devices withdrawal. Ovarian responses to treatments were assayed by progesterone plasmatic levels. Blood samples were collected for 5 days post-eCG administration. Ewes were artificially inseminated 53 + 1 hours after eCG injection with chilled semen using an IMV speculum (n = 23) or a new speculum developed by Ovígén (n = 26). Ejaculates were collected by artificial vaginas. Semen analysis was performed using a computer-assisted sperm analysis (CASA) system. Selected ejaculates presented a volume ≥ 2.0 ml, a sperm concentration ≥ 3.0 x 109 cells/ml, motility ≥ 75%, and a percentage of normal sperm cells ≥ 75%. Insemination doses contained at least 200 x 106 sperm cells. Pregnancy diagnosis was performed by ultrasonography 41 days after AI. All ewes presented progesterone plasmatic levels higher than 0.5 ng/ml for the first five days post-eCG injection. About 81.6% of all ewes were pregnant 41 days after AI. Neither age nor body score condition affected significantly the fertility rate (P>0.05). The synchronization protocol had no statistically significant on the fertility rate (FGA + eCG: 84.6% vs. CIDR+ eCG: 78.3%; c2=1.6; P>0.05). The type of speculum had also not statistically significant on fertility rate (IMV: 87.0%vs. Ovígén: 76.9%; c2=3.4; P>0.05). both speculums result in high fertility rates. However, the Ovígén speculum is easier to use since it allows to pin the vaginal opening of the cervix.
- A assistência veterinária na infeção por Lentivírus dos pequenos ruminantes em Trás-os-MontesPublication . Jacob-Ferreira, João; Coelho, Ana Cláudia; Amo, Cristina del; Vila, Ana Grau; Mínguez González, Olga; Lacasta, Delia; Valentim, Ramiro; Quintas, HelderOs lentivírus dos pequenos ruminantes (SRLV) são um grupo de vírus que infetam ovinos e caprinos. Desenvolvem infeções progressivas e persistentes, afetando principalmente pulmão, sistema nervoso central, glândula mamária e articulações. A maioria dos animais afetados é assintomático e os sinais clínicos podem desenvolver-se anos após a infeção. O diagnóstico é estabelecido por métodos laboratoriais. No nordeste de Portugal a criação de pequenos ruminantes é pouco profissionalizada, apesar da sua grande importância económica. Muitas explorações não possuem assistência veterinária regular, excetuando os controlos sanitários oficiais. O objetivo deste estudo foi estudar a associação da assistência veterinária regular com a infeção por SRLV no nordeste de Portugal
- Coexistence of pulmonary SRLV and OPA lesions in sheepPublication . Jacob-Ferreira, João; Coelho, Ana Cláudia; Lacasta, Delia; Silva, Filipe; Pires, Isabel; Quintas, HelderOvine pulmonary adenocarcinoma (OPA) and Small ruminant lentivirus (SRLV) infection are debilitating, progressive and longstanding diseases, associated to high economic losses in livestock farms. These two diseases can coexist in an animal inflicting among other injuries serious lung disease. The possibility of synergism between the two agents has been speculated for several authors. Due to the lack of serological tests for OPA early diagnosis, the use of imaging techniques (e.g. ultrasound examination) is recommended. Confirmation of the diagnosis includes histopathological and molecular techniques. The main aim of this work was characterizing pulmonary lesions of OPA and SRLV coexisting infections using imaging and pathological diagnostic techniques.
- P-060 Imaging examination in Small Ruminant Lentivirus InfectionPublication . Jacob-Ferreira, João; Coelho, Ana Cláudia; Lacasta, Delia; Valentim, Ramiro; Quintas, HelderSmall ruminant lentivirus (SRLV) is a group of viruses that infect and transmit among ovine and caprine species. This disease is debilitating, progressive and longstanding disease, associated to high economic losses in livestock farms. Diagnosis is largely made with laboratory methods however and not being a common daily practice. Imaging examination can be a useful tool for the diagnosis of SRLV lesions. Imag- ing modalities can be used in an on-farm setting and can be easily implemented for further best-practices in identifying sheep with signs of clinical disease as early as possible. The main aim of this work was characterizing lesions of SRLV infection using imaging diagnostic techniques.
- Plantas tóxicas para pequeños rumiantesPublication . Ferrer, Luis Miguel; Quintas, Helder; Aguiar, Carlos; Ramos, Juan Jose; Lacasta, DeliaDesde tiempos remotos, las propiedades farmacológicas de las plantas son aprovechadas para el tratamiento de enfermedades en el hombre y en los animales. La utilización de substancias extraídas de las plantas es común no solo en la terapéutica alopática, sino también en la práctica veterinaria convencional (ej. atropina y digoxina). Sin embargo, la presencia en las plantas, o en partes de ellas, de determinados alcaloides, glucósidos, oxalatos, minerales y compuestos fotosensibilizantes, entre otros grupos de moléculas químicas, les confiere propiedades nocivas. “Nada es veneno, todo es veneno: la diferencia está en la dosis”, (Paracelso). Este aforismo encuentra su expresión máxima en la toxicidad vegetal. En este documento se resumen los principales efectos tóxicos de las plantas en los pequeños rumiantes, métodos de diagnóstico, medidas de control y prevención.
- Plantas tóxicas para rumiantesPublication . Quintas, Helder; Aguiar, Carlos; Ferrer, Luis Miguel; Ramos Antón, Juan José; Lacasta, DeliaLas plantas tóxicas pueden tener un efecto determinante en la salud animal y un grave impacto económico en las explotaciones pecuarias. Más allá de la naturaleza inespecífica de los cuadros clínicos, la escasez de informaciones veterinaria y botánica adaptadasa la realidad de nuestro trabajo, hacen particularmente difícil el establecimiento de las relaciones causa-efecto entre el consumo de plantas y la enfermedad animal. El presente libro es una respuesta a una necesidad sentida por los veterinarios: la profundización y la integración en la práctica clínica del efecto de la ingestión de plantas tóxicas en la salud de los rumiantes domésticos. Con este libro, los autores han procurado, de forma actualizada y concisa, intentando escapar de la jerga especializada de las ciencias veterinaria y botánica, ofrecer a los veterinarios, y al público en general, información veterinaria y botánica útil sobre las principales plantas tóxicas de la flora mediterránea, indígena o naturalizada, centrándose más en la flora ibérica.
- Project Report: POPTEC: 0687_OVISPID_2_EPublication . Jacob-Ferreira, João; Coelho, Ana Cláudia; Vila, Ana Grau; González, Olga; Pérez, Valentin; Lacasta, Delia; Valentim, Ramiro; Quintas, HelderProject for the promotion and development of sheep and goat farms through the application of innovative health and reproductive programs.
- Serological screening in the detection of small ruminant Lentivirus infection in Portugal: its importancePublication . Jacob-Ferreira, João; Coelho, Ana Cláudia; Vila, Ana Grau; Fe Rodriguez, Christian de la; Lacasta, Delia; Valentim, Ramiro; Quintas, HelderSmall ruminant lentiviruses (SRLV) are a group of viruses that infect and transmit among ovine and caprine species. These inflict progressive and longstanding infections, the majority as asymptomatic or developing late onset clinical signs. The diagnosis is made up with laboratorial methods and given its importance ELISA tests are essential. Nowadays, in Portugal, there is few information about SRLV infection. The main purpose of this research was quantifying the seroprevalence of SRLV in Portugal.