Percorrer por autor "Ferrer, Luis Miguel"
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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.
- La fitoterapia: una potencial herramienta alternativa frente a la coccidiosis ovinaPublication . Torre de la Horra, Amaia; Ferrer, Luis Miguel; Quintas, Helder; Scozzoli, M; Fernández-Blanco, A.M.El presente artículo trata y resume el Trabajo de Fin de Grado titulado “Estudio comparativo en granja de dos tratamientos frente a coccidiosis de corderos entrefinos naturalmente infectados”, de Amaia Torre de la Horra, veterinaria graduada por la Universidad de Zaragoza, defendido durante el mes de septiembre de 2020, aprobado por el comité ético para la investigación animal de la Universidad de Zaragoza, siguiendo las recomendaciones españolas de protección animal RD53/2013, que desarrolla la Directiva Comunitaria 2010/63 sobre protección de animales utilizados para la experimentación y otros fines científicos. El trabajo se realizó en colaboración con el Servicio Clínico de Rumiantes de la Universidad de Zaragoza (SCRUM) y el Centro Experimental APA-CT (Greenvet), Cereales Montoya S.L. (Piensos Herbalucat.es) bajo la coordinación técnica de Boalvet Botanic Veterinary, mediante la puesta a prueba de uno de sus piensos ecológicos de la línea Herbalucat, en la explotación Montesa- Letosa-Marcén de Leciñena (Zaragoza).
- 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.
- Shynchronization of estrous using fga internal pessaries and CIDR in Churra Galega Bragançana EwesPublication . Quintas, Helder; Silva, Luis; Mateus, Óscar; Ramos, Juan Jose; Ferrer, Luis Miguel; Ruiz, Héctor; Lacasta, Delia; Valentim, RamiroThe control of reproduction activity has a major impact in the management and profitability of sheep farms. There are several synchronization of estrous protocols. The progesterone/progestogens protocols are widely used all over the word. The long term protocols are the most commonly applied. Progestogens are synthetic hormones that mimics the effects of progesterone. The fluorgestone acetate(FGA) is the progestogen most used in Portugal. Progesterone is administered by controlled internal drug release device(CIDR) and FGA by vagina internal pessaries. Consumers sees less progesterone as a health threaten as it is a natural hormone. On the other hand, several investigators found CIDR harder to loss and to cause less vaginitis than the internal pessaries.
- Small ruminant Lentivirus: a practical approachPublication . Jacob-Ferreira, João; Pires, Isabel; Alegria, Nuno; Coelho, Ana Cláudia; Garcês, Andrea; Ferrer, Luis Miguel; Lacasta, Delia; Quintas, HelderSmall ruminant lentivirus (SRLV) is a group of viruses of the Retroviridae family, shared between caprine, ovine and wild ruminants. It is responsible for a systemic infection that can affect the lungs, central nervous system, mammary gland and joints, causing chronic, insidious, and progressive diseases, seriously affecting animal health. Concurrently, it is associated with a decrease in milk production, leading to malnutrition of lambs and goat kids and to the premature slaughter of adult animals, causing substantial economic losses. This review aims to gather the latest information regarding lentivirusin small ruminants in the clinical practice, their economic importance, and diagnostic and prevention methods. Diagnosis is based on clinical, analytical, and post-mortem findings. The feasibility of imaging diagnosis is also highlighted. Preventive measures and management interventions, including the culling or segregation of positive animals, are effective options to control or even eradicate this disease. SRLV prevention strategies must be applied continuously to progressively eradicate infection.
- Synchronization of estrous using FGA internal pessaries and CIDR in Churra Galega Bragançana ewesPublication . Quintas, Helder; Silva, Luis; Mateus, Óscar; Ramos, Juan Jose; Ferrer, Luis Miguel; Ruiz, Héctor; Lacasta, Delia; Valentim, RamiroThe main goal of this paper was to compare the efficiency of FGA and CIDR in the synchronization of estrous in Portuguese 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 aging between 2 to 8 years were divided in two groups - FGA (n = 26) and CIDR (n = 23). Body condition was scored according to the Australian classification table. In April 12th FGA ewes received a FGA (20 mg) internal pessary and CIDR ewes received a CIDR (0.35 g) device. Twelve days later internal pessaries and CIDR devices were removed and all ewes were injected with 500 UI of eCG. All ewes were artificially inseminated with chilled semen 53 + 1 hour post eCG injection. Initial ovarian cyclicity and ovarian response to treatments were assayed by progesterone plasmatic levels. Pregnancy diagnosis was performed by ultrasonography 41 days after artificial insemination (AI). About 87.8% (n = 43) of all ewes presented for at least once progesterone plasmatic level higher than 0.5 ng/ml in the two weeks prior to vaginal device insertion. Neither age nor body score condition affected significantly the percentage of ewes initially cyclic (P>0.05). The percentage of ewes that did not lose the vaginal device (FGA: 88.5% vs. CIDR: 91.3%; c2=0.5; P>0.05) or did not present vaginitis (FGA: 92.3% vs. CIDR: 95.7%c2=1.4; P>0.05) was identical in those treated with internal pessaries and with CIDR. All ewes presented progesterone plasmatic levels higher than 0.5 ng/ml for the first five days post-vaginal devices removal. About 81.6% of all ewes were pregnant 41 days after AI. The difference between treatments was not statistically significant (FGA: 84.6%vs. CIDR: 78.3%; c2=1.6; P>0.05). FGA internal pessaries and CIDR devices are very effective in the synchronization of estrous in CGB ewes.