David Risco

David Risco
Universidad de Extremadura | UNEX · Department of Animal Health

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56
Publications
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456
Citations

Publications

Publications (56)
Article
Antimicrobial resistance (AMR) is a global concern and controlling its spread is critical for the effectiveness of antibiotics. Members of the genus Salmonella are broadly distributed, and wild boar may play an important role in its circulation between peri‐urban areas and the environment, due to its frequent interactions both with livestock or hum...
Conference Paper
Full-text available
The INCREMENTO project attempts to evaluate the consequences of a progressive increase of wild ungulate (red deer, Cervus elaphus) abundance on the structure and functioning of two Mediterranean environments (Quintos de Mora, Toledo and Muela de Cortes, Valencia). We are conducting a manipulative approach based on the release of herds of female red...
Article
Full-text available
Lactic acid bacteria (LAB) are gut symbionts that can be used as a model to understand the host-microbiota crosstalk under unpredictable environmental conditions such as wildlife ecosystems. The aim of this study was to determine whether viable LAB can be informative of the health status of wild boar populations. We monitored the genotype and pheno...
Article
Full-text available
Assessing and monitoring the welfare of free-living mammals is not a usual process due to the logistical complications associated with their capture and sedation, collection and storage of biological samples and their release. In this context, non-invasive methods for monitoring wildlife constitute a good alternative approach for in situ conservati...
Article
The Salmonella enterica serovar Choleraesuis affects domestic pig and wild boar (WB), causing clinical salmonellosis. Iberian swine production is based on a free-range production system where WB and Iberian pig (IP) share ecosystems. This study focuses on the negative impact on the pork industry of infections due to this serotype, its role in the s...
Preprint
Citation: Santos FM, Risco D, Sano NY, de Macedo GC, Barreto WTG, Gonçalves P, Fernández-Llario P, Herrera HM (2020) An alternative method for determining the body condition index of the free-living South American coati. Neotropical Biology and Conservation 15(4): 561-569. https://doi. Abstract Assessing and monitoring the welfare of free-living ma...
Article
Background Wild boar is an important reservoir of Mycobacterium tuberculosis variant bovis , the main causative agent of bovine tuberculosis (bTB). A proportion of tuberculosis (TB)-affected wild boars shed M tuberculosis by nasal route, favouring the maintenance of bTB in a multihost scenario. The aim of this work was to assess if M tuberculosis n...
Article
Full-text available
Background: Wildlife poses a significant burden for the complete eradication of bovine tuberculosis (bTB). In particular, wild boar (Sus scrofa) is one of the most important reservoirs of Mycobacterium bovis, the causal agent of bTB. Wild boar can display from mild TB lesions, usually found in head lymph nodes, to generalized TB lesions distributed...
Article
The importance of wild boars as game species in Spain is well known. Their feeding habits and intrusive behaviour, together with a progressively wider spreading of populations, increases the interactions of these animals with livestock and humans. Considering that wild boars could have a potential role in the transmission of certain pathogens as sa...
Article
Vitamin D (VitD) is involved in important mammalian physiological mechanisms, such as Ca–P metabolism, bone development and immunological response. VitD deficiencies are frequently detected in domestic animals and related to various health problems (e.g., rickets, bone deformation). However, knowledge about the status of VitD in wildlife species, s...
Article
Salmonella enterica serovar Choleraesuis is the aetiological agent of swine paratyphoid being a highly invasive zoonotic pathogen. Wild boar natural populations are experiencing a demographical expansion as well as some farms are breeding this species to release for hunting with management sometimes identical to that of domestic pigs, including sup...
Article
Full-text available
Tuberculosis (TB) in wild boar (Sus scrofa) may be affected by coinfections with other pathogens, such as porcine circovirus type 2 (PCV2). Therefore, sanitary measures focused on controlling PCV2 could be useful in reducing the impact of TB in this wild suid. The aim of this study was to explore whether vaccination against PCV2 targeting young ani...
Article
Body condition (i.e., the amount of the energy stored in organs and tissues) is a key parameter that has been related with health, reproductive performance and density of wild ungulates including the wild boar (Sus scrofa). In this wild pig, a reference method to assess body condition has not yet been agreed and different procedures have been used...
Article
Wild boar is an important reservoir of Aujeszky's disease virus (ADV). There is concern that transmission of this virus from wild boar to domestic pigs is possible. The aim of this work was to compare the antibody response produced by single dose of a gE-deleted ADV vaccine in wild boar to revaccinated animals, to assess if simple single-dose vacci...
Article
Full-text available
Background The only natural hosts of Pseudorabies virus (PRV) are members of the family Suidae (Sus scrofa scrofa). In species other than suids infection is normally fatal. In these mammals, including carnivores, PRV typically causes serious neurologic disease. The endangered Iberian lynx (Lynx pardinus) is a wild feline endemic to south-western Eu...
Article
Full-text available
Bovine tuberculosis (bTB) causes significant losses to farming economies worldwide. A better understanding on the epidemiology of this disease and the role that the different hosts develop in the maintenance and spread of bTB is vital to control this zoonotic disease. This study reports the spoligotype diversity and temporal evolution of Mycobacter...
Article
Tuberculosis (TB) is a chronic disease affecting humans and other mammal species. Severity of TB caused by Mycobacterium tuberculosis in humans seems to be influenced by nutritional factors like vitamin D3 intake. However, this relationship has been scarcely studied in cattle and other mammals infected with Mycobacterium bovis. The aim of this work...
Conference Paper
Though multiple infections are the rule rather than exception in the wild, there is still much about the impact of multiple infections on host individuals and populations that we do not know. Objective We investigate the direct and indirect effects of helminth co-infections on body condition, oxidative stress and acute phase proteins in bTB infecte...
Article
The present study evaluated the limitations of the coprological sedimentation test to assess Macracanthorhynchus hirudinaceus infestation in 59 wild boars (Sus scrofa) from central Spain. The coprological sedimentation test appeared to be a poor predictor of both prevalence of infestation and the real parasite burden due to the high number of false...
Article
Porcine respiratory disease complex (PRDC) is a multifactorial respiratory syndrome related to the infection with different pathogens. Although most of these pathogens have been detected in the wild boar, the PRDC pneumonic lesions in this species have not been characterized. The aims of this study were to assess the presence of the main swine resp...
Conference Paper
Full-text available
La tuberculosis (TB) es una enfermedad ampliamente distribuida que afecta a los humanos y otras especies animales. La gravedad de la TB en humanos (causada por Mycobacterium tuberculosis) parece estar relacionada con factores nutricionales como la ingesta de vitamina D. Sin embargo, esta asociación ha sido poco estudiada en vacunos y otros mamífero...
Conference Paper
lesiones generalizadas. Sin embargo, aunque este hecho puede favorecer la diseminación de Mycobacterium bovis (M. bovis) entre los animales, se sabe poco sobre las rutas de excreción de M. bovis en el jabalí. Los objetivos del trabajo fueron demostrar si la secreción nasal es una ruta de excreción posible para M. bovis y si esta vía de contaminació...
Article
Streptococcus suis is a recognized pathogen that may cause important diseases in pigs and humans. This microorganism has been repeatedly isolated from wild boar ( Sus scrofa ). However, its health implications for this wild species are still unknown. This article reports a detailed description of a fatal case of septicemia by S. suis affecting a yo...
Article
Full-text available
Porcine reproductive and respiratory syndrome virus (PRRSV) induces a weak immune response enabling it to persist in different organs of infected pigs. This has been attributed to the ability of PRRSV to influence the induction of cytokine responses. In this study, we investigated the cytokine transcriptional profiles in different compartments of t...
Article
Full-text available
Co-infections with parasites or viruses drive tuberculosis dynamics in humans, but little is known about their effects in other non-human hosts. This work aims to investigate the relationship between Mycobacterium bovis infection and other pathogens in wild boar (Sus scrofa), a recognized reservoir of bovine tuberculosis (bTB) in Mediterranean ecos...
Conference Paper
Bovine Tuberculosis (bTB) has been the subject of eradication campaigns in Spain since 1986. However, there are some areas in this country where the bTB incidence remain high [1]. The presence of great prevalences of bTB in wild reservoirs such as wild boar is one of the main problems in these areas [2]. High prevalences of bTB in wild boar populat...
Article
The wild boar is an important reservoir of bovine tuberculosis (bTB) in south-western Spain. Some risk factors such as wild boar density or age have been associated with the presence of high prevalences of bTB in wild boar. However, the influence of other risk factors such as co-infections with other pathogens has not yet been studied. This work ai...
Article
Aeromonas hydrophila has been repeatedly reported as an animal pathogen. This study describes a case of a wild boar piglet in Spain with severe purulent pneumonia caused by A. hydrophila. To confirm the presence of A. hydrophila in the respiratory tract of wild boars from the same region, lung samples from 34 adult hunted animals and nasal samples...
Article
Full-text available
Sixty-five rats (Rattus norvegicus) and 5 mice (Mus musculus) were trapped from 8 outdoor farms and the presence of Shiga toxin-producing Escherichia coli was not detected in any individual. Nevertheless, using the microscopic agglutination test, it was found that 20% (13/ 65) of rat serum samples were positive for anti-Leptospira antibodies, and D...
Article
Exudative epidermitis, a porcine disease caused by Staphylococcus hyicus, produces serious economic losses in severely affected herds. In this report, we describe a case of exudative epidermitis in a wild boar presenting specific clinical signs. The affected animal was a female approximately 6 months old, with greasy brown exudates around the mouth...
Article
Full-text available
Pasteurella multocida is a common pathogen of swine that causes specific diseases with great economic impact. However, the importance of this pathogen in wild boar is still unknown. In the current work, an outbreak of systemic pasteurellosis in wild boar with a high mortality rate is described. A total of 23 wild boar of all ages were found dead ov...
Article
Limited information has been published on the wild boar immune response against bovine tuberculosis (bTB) and the immunopathogenesis of the pathological hallmark (granuloma) in this species. The main objectives of this study were, on the one hand, to characterize the histopathological features (number of acid-fast bacilli (AFB) and multinucleated g...
Conference Paper
La condición corporal es una medida del estado nutricional de un individuo, especialmente de las reservas energéticas; siendo importante para la monitorización de las poblaciones de animales salvajes. En la mayoría de ungulados, la condición corporal no es fácil de estimar y a menudo requiere la utilización de métodos invasivos, siendo las más util...
Article
Full-text available
Methods such as real time-polymerase chain reaction (RT-PCR) have not been developed for the rapid detection and diagnosis of Dermatophilus congolensis (D. congolensis) infections. In this work, a D. congolensis specific SYBR Green RT-PCR assay was evaluated. The detection limit of the RT-PCR assay was 1 pg of DNA per PCR reaction. There were no cr...
Article
Full-text available
The role of the wild boar (Sus scrofa) as a reservoir for a large number of pathogens that can affect both domestic animals and humans has been widely studied in the last few years. However, the impact of some of these pathogens on the health of wild boar populations is still being determined. This article presents a clinical case of severe bilater...
Data
Full-text available
Non-tuberculous mycobacteria (NTM) are widely distributed in the environment, particularly in wet soil, marshland, rivers or streams, but also are causative agents of a wide variety of infections in animals and humans. Little information is avail-able regarding the NTM prevalence in wildlife and their effects or significance in the bovine tuberculo...
Article
Non-tuberculous mycobacteria (NTM) are widely distributed in the environment, particularly in wet soil, marshland, rivers or streams, but also are causative agents of a wide variety of infections in animals and humans. Little information is available regarding the NTM prevalence in wildlife and their effects or significance in the bovine tuberculos...
Article
The role of the wild boar (Sus scrofa) as a reservoir for a large number of pathogens that can affect both domestic animals and humans has been widely studied in the last few years. However, the impact of some of these pathogens on the health of wild boar populations is still being determined. This article presents a clinical case of severe bilater...
Article
Full-text available
Haemophilus parasuis is a recognized pathogen in domestic pigs; the pathogen has been also isolated from healthy wild boar (Sus scrofa). In the current report, a case of fatal H. parasuis infection in a wild boar piglet from central Spain is described. The affected animal presented severe pneumonic lesions, inflammation in tarsal joints with presen...
Article
Porcine brucellosis is a disease caused by Brucella suis, which is characterized by reproductive disorders in pigs. The number of cases of swine brucellosis has risen in many European countries, likely because of the presence of a wild reservoir of B. suis in wild boar. This study aimed at evaluating factors that may influence the probability of in...
Article
Mycobacterium bovis infections in fallow deer have been reported in different countries and play an important role in the epidemiology of bovine tuberculosis (bTB), together with other deer species. There is little knowledge of the pathogenesis of bTB in fallow deer. The aim of this study was to perform a histopathological characterisation of the g...
Article
Full-text available
The potential role of wild animals in the maintenance and spread of tuberculosis (TB) infection in domestic livestock is of particular importance in countries where eradication programs have substantially reduced the incidence of bovine tuberculosis but sporadic outbreaks still occur. Mycobacterium bovis is the agent mainly isolated in wildlife in...
Article
Full-text available
The current study describes the recovery of Helcococcus ovis from an adult female Verata breed goat that was euthanized because of respiratory problems and emaciation. At necropsy, the affected animal showed a purulent bronchopneumonia with scattered pulmonary abscesses and fibrous pleural adhesions. A Gram-positive, catalase-negative, coccus-shape...
Article
Swine erysipelas (SE) is a disease caused by the bacterium Erysipelothrix rhusiopathiae and is one of the best-known and most serious diseases affecting domestic pigs. However, few studies exist concerning the susceptibility of wild boars to this disease and the role of this species as a reservoir. This study investigates and describes an outbreak...

Projects

Project (1)
Project
- Risk analysis in cattle farms. - Development new diagnostic tools. - Implementation of biosecurity measurements in cattle farms. - Measurements to control tuberculosis in wild and domestic animals.