Ignacio de Blas

Ignacio de Blas
University of Zaragoza | UNIZAR · Faculty of Veterinary

DVM, PhD

About

201
Publications
70,799
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Introduction
Ignacio de Blas currently works at the Faculty of Veterinary, University of Zaragoza. Ignacio does research in Veterinary Epidemiology, Aquaculture and Bioinformatics.
Additional affiliations
July 1999 - present
University of Zaragoza
Position
  • Lecturer

Publications

Publications (201)
Article
Full-text available
The severe acute respiratory syndrome-related coronavirus 2 (SARS-CoV-2) has spread globally and has led to extremely high mortality rates. In addition to infecting humans, this virus also has infected animals. Experimental studies and natural infections showed that dogs have a low susceptibility to SARS-CoV-2 infection, whereas domesticated cats a...
Conference Paper
Full-text available
The genus Trachinotus consists of 40 species of Carangid fish, 6 of which are farmed in tropical and subtropical areas worldwide. After an extensive literature review carried out in 2021 by the FAU-Harbor Branch Oceanographic Institution, 3 species of viruses, 11 species of bacteria, and more than 70 species of parasites were identified as potentia...
Presentation
Full-text available
The genus Trachinotus consists of 40 species of Carangid fish, 6 of which are farmed in tropical and subtropical areas worldwide. After an extensive literature review carried out in 2021 by the FAU-Harbor Branch Oceanographic Institution, 3 species of viruses, 11 species of bacteria, and more than 70 species of parasites were identified as potentia...
Article
Full-text available
Chemodectomas are low prevalence tumors with complex clinical management. Many present as an incidental finding however, in other dogs, they produce pericardial effusion and/or compression, leading to the appearance of severe clinical signs. There are currently several approaches: surgery, radiotherapy, stent placement and chemotherapy. This is the...
Article
This study evaluated the effects of freezing extenders, cryoprotectants and their concentrations, presence of Orvus Es Paste and freezing rates for cryopreserving dromedary camel sperm. Semen (five males; 2 ejaculates/male) was frozen in one of the following extenders (Green Buffer® or INRA96®), cryoprotectants (3 and 6% glycerol or ethylene glycol...
Article
Objective To describe an ultrasound-guided approach to the dorsal aspect of the quadratus lumborum muscle (D-QL) and to evaluate the spread of methylene blue dye in canine cadavers. Study design Prospective, experimental anatomical study. Animals A total of 12 canine cadavers. Methods The ultrasonographic landmarks and injection technique for th...
Article
Full-text available
Small Ruminant Lentiviruses (SRLV) are highly prevalent retroviruses with significant genetic diversity and antigenic heterogeneity that cause a progressive wasting disease of sheep called Maedi-visna. This work provides a systematic review and meta-analysis of the last 40 years (1981–2020) of scientific publications on SRLV individual and flock pr...
Article
Full-text available
Vibrio parahaemolyticus is the leading cause of seafood-associated bacterial gastroenteritis worldwide. Although different studies have focused on its pattern of variation over time, knowledge about the environmental factors driving the dynamics of this pathogen, within the Chilean territory, is still lacking. This study determined the prevalence o...
Article
This study presents a novel approach to use claw disorders in cattle as a retrospective welfare indicator characterized at the abattoir. A total of 1040 cattle (2080 front and back left claws) were analyzed from 143 batches, originating from feedlots, free-range, and dairy systems. Our results indicate that abnormal claw shapes (>55%) and fissures...
Poster
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This study describes the use of extremity mounted IMU´s to determine the tempo of horses during competition simulation and the precision of the horse-rider binomy to maintain an optimal tempo.
Poster
Full-text available
Describes the use of extremity mounted IMU to see the changes that are produced by the rider in dressage horses
Article
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Aluminum (Al) hydroxide is an effective adjuvant used in sheep vaccines. However, Al-adjuvants have been implicated as potential contributors to a severe wasting syndrome in sheep—the so-called ovine autoimmune-inflammatory syndrome induced by adjuvants (ASIA syndrome). This work aimed to characterize the effects of the repetitive injection of Al-h...
Article
Full-text available
Hysteromorpha triloba: first report of the Black Spot Disease in inland waters of Castile and Leon (Spain) Blackspot Disease is a pathological process that affects freshwater and marine fish, characterized by the encapsulation of the metacercariae phases in the skin surface layers and that stimulates the accumulation of melanin. Hysteromorpha tril...
Conference Paper
Full-text available
River Duero Basin, located in the mid-north plateau of the Iberian Peninsula, represents about 82% of the surface of the Castilla y León Region (Northwest Spain). In a high altitude, it presents a Continental climate. Its main riverbed, the Duero River, is the second in length (913 km) and the first in river flow, characterized by its irregularity....
Article
Background: In the UK, there are thousands of donkeys being cared for by charities; however, little is known about the reasons for relinquishment or their previous health status, with even less information available in published literature. Such information could help to identify factors contributing to poor equine welfare and guide the developmen...
Article
Full-text available
Background: Animals and people in many Spanish regions are increasingly being affected by blackfly bites in the last decade. Because of blackflies, the city of Zaragoza has become in recent years a paradigm of discomfort in Europe, with thousands of citizens affected. The OMI-AP system (Stacks, Barcelona, Spain) implemented by the Government of Ara...
Book
Full-text available
MedAID (Mediterranean Aquaculture Integrated Development) is a European H2020 Research and Innovation Project that started in 2017. The main objective was to increase the overall competitiveness and sustainability of the whole value chain of the Mediterranean marine aquaculture sector by improving its technical and business performance and by shift...
Article
The use of histopathology in fish sciences is broadly extended, although it is currently devoid of standardization across the literature. There have been initiatives to standardize every step of the histological evaluation, including description, diagnosis, interpretation, data recording and reporting, and statistical analysis, but, in general, the...
Article
Full-text available
An adequate sampling methodology is the key to knowing the health status of aquatic populations. Usually, the aims of epidemiological surveys in aquaculture are to detect an infection and estimate the disease prevalence, and different formulas are used to calculate the sample size. The main objective of this study was to assess if the sample sizes...
Article
Full-text available
Small ruminant lentiviruses (SRLVs) are endemic in most areas of Europe, causing a chronic infection and a multisystemic disease affecting the udder, carpal joints, lungs, and central nervous system. Due to the lack of treatments and protective vaccination strategies, infection control is focused on the identification of infected animals through se...
Article
Sheep health management strategies often include the use of aluminum (Al)-containing vaccines. These products were associated with the appearance of the ovine autoimmune/inflammatory syndrome induced by adjuvants (ASIA syndrome), which included an array of ethological changes in the affected animals. The aim of this pilot study was to investigate c...
Article
The use of vaccines containing aluminum (Al) adjuvants is widespread in ovine production. Al adjuvants induce an effective immune-response but lead to the formation of post-vaccination granulomas from which Al can disseminate. This work aims to study the accumulation of Al in the central nervous system of sheep subcutaneously inoculated with Al-hyd...
Article
Full-text available
Artificial insemination with cooled semen is the most common practice in rabbit farms and any improvement on it helps to increase the efficiency and productivity of rabbit meat farms. Therefore, the aim of this study was to assess whether different cryoprotectant agents (CPA) as glycerol, N, N-Dimethylformamide (DMF) and N-Methyl-2-Pyrrolidone (NMP...
Article
Margaritifera auricularia is one of the most endangered freshwater mussels (Bivalvia, Unionida) in the world. Since 2013, the abundance of this species in the Ebro River basin (Spain) has sharply declined, driving the species to the verge of regional extinction. Therefore, any management measures that might facilitate the recovery of this species w...
Thesis
La infección crónica por el virus de la hepatitis C es una de las principales causas de enfermedad hepática a nivel mundial. Su evolución es muy variable y en la mayoría de los pacientes de progresión lenta. La aparición de fibrosis hepática es clave y se produce como consecuencia de la agresión continuada del agente causal, lo que conlleva la remo...
Article
The purpose of this research was to find a suitable protocol to enhance frozen rabbit sperm preservation analysing the role that seminal plasma (SP) plays and the effect of different cryoprotectant agents on sperm quality 0 and 2 h after thawing. Sperm samples were pooled and divided in eight fractions. Four of them were diluted with BotuCrio<sup>®...
Article
Full-text available
Background Revascularization with carotid stent (CAS) is considered the therapeutic alternative to endarterectomy (CEA). However, its role compared to CEA remains questioned, mainly due of the heterogeneity of long-term results. The objective of this study was to report the efficacy and durability of CAS in terms of stroke prevention in a “real wor...
Article
Aluminum (Al)-containing vaccines are common in sheep management and they have been associated with the Autoimmune/inflammatory Syndrome Induced by Adjuvants (ASIA syndrome). The aim of this study was to investigate cognitive and behavioral changes in sheep subjected to a protocol of repetitive inoculation with Al-containing products. Twenty-one la...
Article
Full-text available
The use of vaccines including aluminum (Al)-based adjuvants is widespread among small ruminants and other animals. They are associated with the appearance of transient injection site nodules corresponding to granulomas. This study aims to characterize the morphology of these granulomas, to understand the role of the Al adjuvant in their genesis, an...
Article
Full-text available
The purpose of this research was to assess whether the presence of seminal plasma (SP) can improve sperm quality of rabbit spermatozoa stored at 16ºC for 72 hours and moreover evaluate the cryoprotectant effects of glycerol, N-N-Dimethylformamide (DMF), and N-methyl-2-pyrrolidone (NMP). Semen samples were pooled and divided in eight fractions. Four...
Article
Freeze-drying (FD) technique has been applied as an alternative technology to preserve gene resources to allow simple sperm preservation and shipment at 4 °C. Nevertheless, DNA sperm might be damaged by mechanical or oxidative stress throughout FD procedure. Therefore, suitable protection to maintain DNA integrity is required. The aim of this study...
Article
Full-text available
Body condition scoring (BCS) is an indirect measure of the level of subcutaneous fat; however, by measuring the subcutaneous fat thicknesses (SFT), the precision of the degree of fatness assessment is improved. The aims were: 1) to develop an alternative body fat scoring index (BFSI) based on ultrasonographic measurements; 2) to assess the agreemen...
Article
Full-text available
The global production and yield of shrimp ponds depend on multiple factors, and an unexpected variation in production parameters could be an indicator of pathological events such as white spot disease (WSD) outbreaks in a syndromic surveillance system. Using the production data from 7139 production cycles at farm level collected at two Mexican stat...
Poster
Full-text available
Las hembras adultas de Ergasilus sieboldi y Lernaea cyprinacea se encuentran principalmente en la cavidad branquial y el tegumento de los peces a los que parasitan, produciendo la destrucción física de los tejidos, procesos ulcerativos e inflamación (Figura 1), así como un cambio en el comportamiento; además, en casos de infección severa, pueden da...
Article
Bivalve storage at inadequate temperatures contains greater densities of Vibrio parahaemolyticus. The objective of the present study was to determine if there were any differences in growth and survival of potentially pathogenic V. parahaemolyticus (tdh positive) in relation to nonpathogenic V. parahaemolyticus (tdh-trh negative) levels in Manila c...
Article
Full-text available
Morphometry has proven to be a useful tool, both for the clinician and horse owners, for evaluating the body condition in equids due to its objectivity, easiness and capacity for detection of important metabolic disturbances. However, limited information is available on the use of morphometric ratios to characterize regional and overall adiposity a...
Article
Several therapies have been investigated for equine tendinopathies, but satisfactory long term results have not been achieved consistently and a better understanding of the healing mechanism elicited by regenerative therapies is needed. The aim of this study was to assess the separate effects of autologous bone marrow (BM) and adipose tissue (AT) d...
Article
The presence of DNA protective agents in the medium is necessary to maintain sperm functionality after freeze-drying procedure. The objective of this study was to investigate the effect of chelating agents, ethylene diaminetetraacetic acid (EDTA) and ethylene glycoltetraacetic acid (EGTA), in combination with rosmarinic acid (RA) on DNA integrity o...
Article
Full-text available
The unintentional discovery of cirrhosis in a patient with prostate cancer lead us to enquire if some of the indexes/scored designed for the evaluation of liver fi brosis/cirrhosis, in Chronic Hepatitis C patients, could have helped us in the detection of incipient liver fi brosis, and its follow up, in this patient. We applied seven indexes/scores...
Article
Full-text available
Tilapia is one of the most important species in aquaculture; however, there is no available index to show the performance of a production unit. It is desirable to assess the productivity using indexes, such as the production and management index for shrimps and the European production efficacy factor for broilers. These indexes are based on data pr...
Article
Full-text available
Tilapia is one of the most important species in aquaculture; however, there is no available index to show the performance of a production unit. It is desirable to assess the productivity using indexes, such as the production and management index for shrimps and the European production efficacy factor for broilers. These indexes are based on data pr...
Poster
Full-text available
Mathematical modelling is a powerful tool that allows simulating different scenarios, and it can be useful to develop different strategies for eradication and disease control. This kind of tools have advantages and disadvantages, it is really difficult to build a model that accurately represents the real world, because the algorithm can be so compl...
Article
White spot disease (WSD), caused by the white spot syndrome virus, is currently one of the primary causes of mortality and economic losses in the shrimp farming industry worldwide. In Mexico, shrimp production is one of the most important primary activities generating an annual income of USD 711 million. However, WSD introduction in 1999 had a deva...
Article
Full-text available
Syndromic surveillance and participatory epidemiology are nowadays taking part in the public health system because they can be very interesting tools to complement the classical ones. Although syndromic surveillance could be nonspecific, it is usually based on real-time data analysis to provide early warnings. Participatory Epidemiology can bring u...
Conference Paper
Full-text available
Obesity has been associated with increased circulating concentrations of insulin, leptin and triglycerides however little is knownn about the relationship among morphometric measurements and these blood variables related to obesity. The objectives of the study were to determine the association of morphometrics and scoring systems with insulin, lept...
Article
Background: The aim of this study was to compare fourteen non-invasive indexes/scores: AAR, APRI, Fibroindex, MODEL3, Forns index, FIB4, GUCI, FI, FCI, Pohl score, AP index, CDS, HGM-1 and HGM-2, in order to diagnose the hepatic fibrosis stage in a survey of patients with chronic hepatitis C. Methods: 84 patients with chronic hepatitis C were st...
Article
Equine metabolic syndrome (EMS) can be diagnosed by hormonal measurements; however, it would be important to find simpler measurements that allow easy identification of affected or at risk individuals. In horses, the dorsal neck region is one of the most frequent anatomical sites for fat deposition and neck obesity has been linked to EMS. The aim o...
Article
Body scoring system is a functional method to monitor overall adiposity. However, scorer experience, horse breed, gender or local fat deposits are confounding factors, primarily in breeds with noticeable phenotype and tendency to subcutaneous fat deposition. Therefore, the ultrasonographic evaluation of subcutaneous fat thickness (SFT) could be an...
Chapter
Bivalve molluscs are scientifically and economically important invertebrates. Among them, oysters and clams dominate other species with respect to global distribution and aquaculture production. Recently, with research advancements in farming technology, environmental monitoring and disease control, as well as the diversification of cultured specie...
Article
Full-text available
White spot disease is one of the most serious problems in the shrimp-farming industry in Mexico. An assessment of risk of an outbreak of the disease could be useful for farmers making decisions concerning early harvest to minimize economic losses. A group of researchers identified the most important risk factors, classified in four broad categories...
Article
Full-text available
An epidemiological survey was conducted in pastoral regions of Ethiopia to investigate the distribution of brucellosis in sheep and goats. Between November 2004 and December 2007 a total of 6,201 serum samples were collected from 67 randomly selected peasant associations, 25 districts and eight pastoral zones of Ethiopia. The Rose Bengal plate test...
Article
The aim of this study was to determine the effect of based milk soy extender combined with two different cryoprotectants: dimethylformamide (DMF) and glycerol, on ram sperm quality after cryopreservation. Five freezing extenders were assessed: Tryladil, Andromed (controls) and three soya milk experimental extenders containing: (A) 6% glycerol, (B)...
Poster
Full-text available
The aim of this paper is to focus on redesigning the breeding methodology for M. auricularia tried out last year, in order to improve procedures and refine the details.
Conference Paper
Full-text available
Reasons for performing study: Andalusian horses have been proposed as a breed predisposed to equine metabolic syndrome (EMS) phenotype [1] because they are prone to exhibiting regional, generalised adiposity and tendency to laminitis [2]. Insulin dysregulation represents the main pathophysiological cause for all the features of EMS, however there a...
Article
Freeze-drying (FD) has been proposed as an alternative method to preserve spermatozoa. During the FD procedure, sperm DNA might become damaged by both freezing and drying stresses caused by the endonucleases, the oxidative stress and the storage conditions. We examined the DNA integrity of dog sperm freeze-dried with two kinds of chelating agents i...
Article
Full-text available
Vibrio parahaemolyticus is a well-recognized pathogen of humans. To better understand the ecology of the human-pathogenic variants of this bacterium in the environment, a study on the prevalence in bivalves of pathogenic variants (tlh + and tdh+ and/or trh+) versus a non-pathogenic one (only tlh+ as species marker for V. parahaemolyticus), was perf...
Article
To assess whether the presence of an atherosclerotic lesion may alter the deposition kinetics of paclitaxel on the arterial wall after drug-eluting balloon (DEB) angioplasty, as well as paclitaxel concentrations in serum and in the recovered balloons. Three New Zealand White rabbit models were created: an atheroma group (arterial mechanical injury...
Article
Full-text available
Objective: To study the effects of rosemary honey as energy source and cryoprotectant in combination with garlic as a natural antibiotic on the quality of ram spermatozoa upon cooling. Materials and methods: The ejaculates from three rams were evaluated at different times during cooling to determine its post-dilution quality. Results: Glycerol...
Article
The aim of this study was to determine the effect of pasteurized egg yolk and the supplementation with rosemary honey on ram sperm quality after cryopreservation process. Ejaculates were obtained from three rams (Rasa Aragonesa), and semen samples were processed using straw freezing procedure. In experiment 1, semen samples were frozen in four diff...