RESUMEN
Rabbit hemorrhagic disease (RHD) is a highly infectious disease in European rabbits (Oryctolagus cuniculus), caused by a virus belonging to the genus Lagovirus (RHDV; family Caliciviridae). In 2010, a new genotype of RHDV (RHDV2 or RHDVb, currently designated GI.2) emerged in France, affecting both domestic rabbits, even those vaccinated for the classical RHDV genotypes (currently designated GI.1) and wild rabbits. GI.2 was subsequently identified in other European countries. The aim of the present study was to monitor the GI.2 epidemic in wild rabbits in Andalusia (southern Spain) during the period 2013-2017. At the beginning of summer 2013, high mortalities were detected in wild rabbit populations in southern Spain. A total of 96 affected hunting or protected areas were surveyed. The first outbreak was observed on June 2013. The number of outbreaks sharply increased in 2013 and 2014, with a decreasing trend being observed during the following years. The spatial distribution of GI.2 was not homogeneous, since most of the detected outbreaks were concentrated in the western part of Andalusia. The outbreaks peaked in winter and spring and have been detected in the last five consecutive years, which suggests endemic circulation of GI.2 in wild rabbit populations in Spain. A total of 190 dead rabbits from 87 of the 96 areas surveyed were collected during the study period. Mortality affected rabbits of different age classes, including kittens. RT-PCR confirmed the presence of GI.2 RNA in the livers of 185 of the 190 (97.4%) rabbits. Phylogenetic analysis performed on eleven samples collected in different provinces of Andalusia between 2013 and 2017, showed high nucleotide identity with GI.2 strains Spain, France and Portugal. The results constitute an important step in understanding of the emergence and spread of GI.2 in this country and will provide valuable information for the development of surveillance programs in Europe.
Asunto(s)
Animales Salvajes , Infecciones por Caliciviridae/veterinaria , Epidemias/veterinaria , Virus de la Enfermedad Hemorrágica del Conejo , Conejos/virología , Animales , Infecciones por Caliciviridae/epidemiología , Infecciones por Caliciviridae/virología , Enfermedades Transmisibles Emergentes/veterinaria , Enfermedades Transmisibles Emergentes/virología , Filogenia , ARN Viral/genética , ARN Viral/aislamiento & purificación , España/epidemiologíaRESUMEN
This study compares the effectiveness of the ultra-rapid and conventional freezing of sperm from captive bovids, giraffids, cervids, ursids, a cercopithecid, a delphinid and a phascolarctid. The relationship between sperm head dimensions and cryosurvival was also examined. Compared to conventional freezing, the ultra-rapid freezing of epididymal sperm from the dama gazelle, giraffe and brown bear returned higher cryoresistance ratios (CR, the ratio, in percentage, between the value of the variable after thawing/value before thawing) for sperm viability and motility. In the remaining species, the conventional freezing of epididymal sperm returned better CR values. The conventional freezing method also returned better CR values for ejaculated samples from all species. The head dimensions of both fresh epididymal and ejaculated sperm differed widely among species: for epididymal sperm, dolphin sperm heads were the smallest (7.189⯱â¯0.049⯵m2) and dama gazelle sperm heads the largest (43.746⯱â¯0.291⯵m2), while for ejaculated sperm, giant panda sperm heads were the smallest (15.926⯱â¯0.150⯵m2) and mouflon sperm heads the largest (38.258⯱â¯0.104⯵m2). However, no significant correlations were detected between the CR for motility, viability, membrane functional integrity or acrosome integrity and the sperm head area, either for epididymal or ejaculated sperm. In conclusion, ultra-rapid freezing is especially recommended for the cryopreservation of dama gazelle, giraffe and brown bear epididymal sperm. Sperm head dimensions appear not to be useful predictors of how well sperm might survive freezing.
Asunto(s)
Criopreservación/veterinaria , Especies en Peligro de Extinción , Preservación de Semen/veterinaria , Espermatozoides/fisiología , Animales , Supervivencia Celular , Criopreservación/métodos , Masculino , Análisis de Semen/veterinaria , Preservación de Semen/métodos , Espermatozoides/citología , Factores de TiempoAsunto(s)
Carnívoros/microbiología , Carnívoros/virología , Conservación de los Recursos Naturales , Lynx , Animales , Prevalencia , EspañaRESUMEN
The present study reports the effect of shortening the prefreezing equilibration time with glycerol on the quality of frozen-thawed ejaculated sperm from four Mediterranean mountain ungulates: Cantabrian chamois (Rupicapra pyrenaica), Iberian ibex (Capra pyrenaica), mouflon (Ovis musimon) and aoudad (Ammotragus lervia). Ejaculated sperm from these species were divided into two aliquots. One was diluted with either a Tris-citric acid-glucose based medium (TCG-glycerol; for chamois and ibex sperm) or a Tris-TES-glucose-based medium (TTG-glycerol; for mouflon and aoudad sperm), and maintained at 5°C for 3h prior to freezing. The other aliquot was diluted with either TCG (chamois and ibex sperm) or TTG (mouflon and aoudad sperm) and maintained at 5°C for 1h before adding glycerol (final concentration 5%). After a 15min equilibration period in the presence of glycerol, the samples were frozen. For the ibex, there was enhanced (P<0.05) sperm viability and acrosome integrity after the 3h as compared with the 15min equilibration time. For the chamois, subjective sperm motility and cell membrane functional integrity were less (P<0.05) following 15min of equilibration. In the mouflon, progressive sperm motility and acrosome integrity was less (P<0.05) when the equilibration time was reduced to 15min. For the aoudad, the majority of sperm variables measured were more desirable after the 3h equilibration time. The freezing-thawing processes reduced the sperm head size in all the species studied; however, the equilibration time further affected the frozen-thawed sperm head variables in a species-dependent fashion. While the equilibration time for chamois sperm might be shortened, this appears not to be the case for all ungulates.
Asunto(s)
Criopreservación/veterinaria , Crioprotectores/farmacología , Glicerol/farmacología , Preservación de Semen/veterinaria , Ovinos/fisiología , Animales , Criopreservación/métodos , Crioprotectores/administración & dosificación , Glicerol/administración & dosificación , Masculino , Preservación de Semen/métodos , Ovinos/clasificación , Especificidad de la Especie , Motilidad Espermática , TemperaturaRESUMEN
By the end of August 2010, high mortalities in red-legged partridges (Alectoris rufa) and pheasants (Phasianus colchicus) were detected in several hunting states in the province of Cádiz (southern Spain). Retrospective epidemiological studies revealed that the first clinical signs had been observed in late July-early August. The most common clinical signs were incoordination, disorientation and ataxia. The estimated mean morbidity rates were 37% in partridges and 11% in pheasants. The estimated mean mortality rates were 23% in partridges and 6% in pheasants. The estimated mean case-fatality rates were 38% and 8% in partridges and pheasants, respectively. A total of 19 clinically affected birds from 18 affected hunting states were analysed between August and November 2011. Histopathological analyses revealed encephalitis, myocarditis, leiomyositis, meningoencephalitis and neuritis as the most frequently observed lesions. Molecular analyses identified Bagaza virus (BAGV) as the causative agent of the epidemic. Further studies are needed to determine the source of introduction of the virus into Europe and to elucidate whether wild birds play a role in the epidemiology of BAGV. Surveillance in susceptible bird species, including partridges and pheasants, may be useful for the early detection of BAGV in an area.
Asunto(s)
Animales Salvajes/virología , Enfermedades de las Aves/epidemiología , Brotes de Enfermedades/veterinaria , Infecciones por Flavivirus/veterinaria , Flavivirus/patogenicidad , Galliformes/virología , Animales , Enfermedades de las Aves/virología , Flavivirus/genética , Flavivirus/aislamiento & purificación , Infecciones por Flavivirus/epidemiología , Infecciones por Flavivirus/virología , ARN Mensajero/genética , ARN Viral/genética , Reacción en Cadena en Tiempo Real de la Polimerasa , Estudios Retrospectivos , Reacción en Cadena de la Polimerasa de Transcriptasa Inversa , Pruebas Serológicas , España/epidemiologíaRESUMEN
This work examines the effect of testosterone secretion and photoperiod on seasonal changes in horn growth and sperm variables in the Iberian ibex (Capra pyrenaica), here used as a model for polygynous wild bovids. The hypothesis that high levels of testosterone provide an endocrine signal that inhibits horn growth in autumn was tested by assessing the effect of cyproterone acetate (CA), an anti-androgen, administered in October - coinciding with the period of natural increases in plasma testosterone concentrations - under different photoperiodic conditions (natural photoperiod and artificial long days). The persistence of horn growth during autumn in all ibexes held under the long-day photoperiodic conditions clearly shows that horn growth regulation in the mating season is primarily modulated by day length and not by a fall in testosterone concentration. A retrospectively designed second experiment involving testosterone propionate (TP) administration in April (when horns are growing) was then undertaken to confirm that high levels of testosterone do not inhibit horn growth. Overall, the results strongly suggest that the rise in testosterone secretion during the autumn mating season does not act as an endocrine signal for the arrest of horn growth, although the rate of horn growth before the mating season may be related to springtime testosterone levels. A direct relationship was seen between the rate of horn growth and the incidence of sperm abnormalities. Neither CA treatment in October nor TP administration in April affected the studied sperm variables. By contrast, CA treatment plus artificial long days in autumn had a negative effect on sperm motility and sperm morphology.
Asunto(s)
Cabras , Cuernos/crecimiento & desarrollo , Fotoperiodo , Espermatozoides/fisiología , Testosterona/fisiología , Antagonistas de Andrógenos/administración & dosificación , Antagonistas de Andrógenos/farmacología , Animales , Animales Salvajes , Acetato de Ciproterona/administración & dosificación , Acetato de Ciproterona/farmacología , Cabras/sangre , Cabras/crecimiento & desarrollo , Cabras/metabolismo , Cabras/fisiología , Cuernos/efectos de los fármacos , Masculino , Modelos Biológicos , Apareamiento , Reproducción/efectos de los fármacos , Reproducción/fisiología , Rumiantes/sangre , Rumiantes/crecimiento & desarrollo , Rumiantes/metabolismo , Rumiantes/fisiología , Estaciones del Año , Análisis de Semen/veterinaria , Espermatozoides/citología , Espermatozoides/efectos de los fármacos , Testosterona/metabolismo , Testosterona/farmacología , Propionato de Testosterona/administración & dosificación , Propionato de Testosterona/farmacologíaRESUMEN
A cross-sectional study was carried out on Spanish ibex populations in Southern Spain to assess the seroprevalence of Toxoplasma gondii and Neospora caninum and to investigate the risk factors associated with these infections. Using the modified agglutination test, the seroprevalence to T. gondii was 27.5% (146/531; CI(95%), 23.7-31.3), and this seropositivity significantly increased with age. Among adults, statistically significant differences were observed between geographical locations and over different sampling years. Thirty of 531 (5.6%) ibex had antibodies to N. caninum using a competitive ELISA, of which 27/30 (5.1%; CI(95%), 3.1-7.1) were confirmed as seropositive by the indirect fluorescent antibody test. This study is the first to report the presence of N. caninum antibodies in Spanish ibex and also indicates widespread exposure of this species to T. gondii. The findings indicate that ibex are more exposed to T. gondii than to N. caninum in their natural environment and there is little evidence of co-infection with both parasites. The seroprevalence levels reported suggest a role for ibex in the sylvatic cycle of both parasites with potentially important environmental and public health implications.
Asunto(s)
Coccidiosis/veterinaria , Enfermedades de las Cabras/epidemiología , Neospora/aislamiento & purificación , Toxoplasma/aislamiento & purificación , Toxoplasmosis/epidemiología , Animales , Animales Salvajes , Anticuerpos Antiprotozoarios/sangre , Coccidiosis/epidemiología , Estudios Transversales , Femenino , Enfermedades de las Cabras/parasitología , Cabras , Masculino , Estudios Seroepidemiológicos , España/epidemiologíaRESUMEN
The effects of three intramuscular anesthesia protocols--detomidine 190 µg/kg plus ketamine 2 mg/kg, detomidine 270 µg/kg plus ketamine 1.4 mg/kg, and tiletamine 3.4 mg/kg plus zolazepam 3.4 mg/kg--on penis protrusion and ejaculation variables were compared in nine captive Spanish ibex (Capra pyrenaica) subjected to electroejaculation. Body temperature, heart, and respiratory rates, as well as a number of plasma biochemical variables were also recorded prior to and during anesthesia. The detomidine plus ketamine protocols induced bradycardia and increased respiratory rate. However, the tiletamine/zolazepam protocol did not affect heart and respiratory rates. None of the three protocols caused a substantial change in rectal temperature, yet all protocols caused a significant increase in plasma glucose levels. Differences in anesthetic protocols did not affect sperm quality or quantity. However, choice of anesthetic protocol affected (P<0.05) the degree of penis protrusion and the electrical pulse sequence required to achieve ejaculation. Results of this study support a recommendation of detomidine 270 µg/kg plus ketamine 1.4 mg/kg for anesthesia of Spanish ibex undergoing electroejaculation.
Asunto(s)
Eyaculación/fisiología , Estimulación Eléctrica/métodos , Cabras/fisiología , Hipnóticos y Sedantes/farmacología , Anestesia/veterinaria , Animales , Quimioterapia Combinada , Hipnóticos y Sedantes/administración & dosificación , Inyecciones Intramusculares , MasculinoRESUMEN
The effectiveness of electroejaculation for obtaining Spanish ibex sperm samples for freeze preserving outside the rutting season was evaluated-the aim being to optimise biological resources for the establishment of germplasm banks. The effect of different egg yolk concentrations (6% or 12%, v/v) in diluents of different buffer composition (Tris-citric acid buffer or Tes-Tris buffer) on frozen-thawed samples of the above also investigated. Experiments were undertaken with six ibex males in February-May, and involved four different semen samples from each animal with four combination of extender, respectively: Tes-Tris-glucose (TTG)-6% egg yolk, TTG-12% egg yolk, Tris-citric acid-glucose (TCG)-12% egg yolk, TCG-6% egg yolk. The results show that electroejaculation is a useful way of obtaining sperm samples from Spanish ibex outside the rutting season (i.e., at a time coinciding with plasma testosterone levels of <0.4ng/ml). According to the results of the eosin-nigrosin staining and the hypo-osmotic swelling test, the freezing-thawing process significantly reduced the viability and membrane integrity of the spermatozoa extended with TTG-6% egg yolk, TTG-12% egg yolk, and TCG-12% egg yolk, but did not affect these variables in spermatozoa extended with TCG-6% egg yolk. Therefore, the use of Tris-citric acid-based extenders containing low concentrations of egg yolk is recommended for cryopreserving Spanish ibex spermatozoa obtained by electroejaculation outside the rutting season.
Asunto(s)
Criopreservación/métodos , Cabras , Estaciones del Año , Preservación de Semen/métodos , Recuperación de la Esperma , Animales , Supervivencia Celular/efectos de los fármacos , Crioprotectores/farmacología , Eyaculación/fisiología , Glucosa/farmacología , Cabras/fisiología , Masculino , Conducta Sexual Animal/fisiología , Espermatozoides/efectos de los fármacos , Testosterona/sangre , Trometamina/farmacologíaRESUMEN
La rotura traumática de aorta es una lesión que seencuentra entre el 17 y el 20% de víctimas mortales deaccidentes de tráfico, cuando se realizan autopsias completas.Se asocia a accidentes con desaceleraciones elevadas,en colisiones y atropellos a alta velocidad y, aunque es unalesión muy grave, si no se ha producido la muerte in situ,puede sobrevivirse a ella si se sospecha, se diagnostica precozmentey se trata. Por ello, la información relativa a lascircunstancias del accidente y de la víctima biomecánicay mecanismo lesivo es muy orientadora para sospechar suexistencia y actuar en consecuencia.La asociación de lesiones en tronco y cabeza es frecuente,contribuyendo a su elevada mortalidad.El tratamiento, bien mediante reparación quirúrgica ocolocación de prótesis intravascular, suponen una esperanzapara pacientes que constituyen un grupo incluído en elde mortalidad evitable(AU)
Traumatic aortic rupture is an injury found in 17% to20% of traffic accident casualties, when autopsied. It isassociated to high decceleration impacts, at high speedcrashes and run-over pedestrians, and though it is a verysevere injury, and if immediate death has not happened,survival is possible if it is suspected, and promptly diagnosedand treated. Therefore information related to crashand patient circumstances biomechanics and injurymechanism is very helpful to suspect it and actingaccordingly.Associated head, thorax, abdomen, and pelvic injuriesare very frequent, contributing to its high death toll.Treatment through surgical repair or endovascular prosthesis(stent) placement, gives some hope to patientincluded in the avoidable death group(AU)
Asunto(s)
Humanos , Rotura de la Aorta/diagnóstico , Traumatismos Torácicos/complicaciones , Fenómenos Biomecánicos/métodos , Angiografía , Accidentes de Tránsito , Cinética , Tomografía Computarizada por Rayos X , Ecocardiografía Transesofágica , Angioplastia de BalónRESUMEN
To elucidate whether serum alpha and beta-carotene and retinol levels are related with the risk for amyotrophic lateral sclerosis (ALS), we compared serum levels of alpha-carotene, beta-carotene, and retinol (vitamin A), measured by HPLC, in 40 patients with amyotrophic lateral sclerosis (ALS) and 87 matched controls using an isocratic high performance liquid chromatography technique. The mean serum alpha and beta-carotene, and retinol levels did not differ significantly between the 2 study groups. These values were not influenced by the clinical form (spinal vs bulbar) of ALS, and they did not correlate with age, age at onset, and duration of the disease. These results suggest that serum alpha and beta-carotene and retinol concentrations are unrelated with the risk for ALS.
Asunto(s)
Esclerosis Amiotrófica Lateral/fisiopatología , Antioxidantes/análisis , Carotenoides/sangre , Vitamina A/sangre , beta Caroteno/sangre , Adulto , Anciano , Estudios de Casos y Controles , Cromatografía Líquida de Alta Presión , Femenino , Humanos , Masculino , Persona de Mediana Edad , Factores de RiesgoRESUMEN
We compared CSF and serum levels, and the CST/serum ratio of alpha-tocopherol (vitamin E), measured by HPLC, in 44 apparently well-nourished patients with Alzheimer's disease (AD) and 37 matched controls. CSF and serum vitamin E levels were correlated, both in AD patients and in controls. The mean CSF and serum vitamin E levels were significantly lower in AD patients, and the CSF/serum ratio of AD patients did not differ significantly between the 2 study groups. CSF vitamin E levels did not correlate with age, age at onset, duration of the disease and score of the Minimental State Examination in the AD group. Weight and body mass index were significantly lower in AD patients than in controls. These results suggest that low CSF and serum vitamin E concentrations in AD patients could be related with a deficiency of dietary intake of vitamin E.