Publications by authors named "Sabrina Castro-Scholten"

Recent molecular and metagenomic studies have revealed that the obligate anaerobic protist Blastocystis is found more prevalently and with higher subtype diversities in herbivore species than in carnivore species. However, information on wild carnivore species is scarce. Here, we investigated the presence of Blastocystis by molecular methods in fecal DNA samples of free-ranging and captive Iberian lynxes from Spain (n = 243) and Portugal (n = 30).

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We conducted a survey for domestic cat hepadnavirus, an analog of human hepatitis B virus, in the endangered felid species Iberian lynx. Results revealed specific antibodies in 32.3% of serum samples and DNA in 0.

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Article Synopsis
  • West Nile virus (WNV) is a widespread mosquito-borne virus raising concerns for health in Europe, yet no studies have previously investigated its impact on wild rabbits and hares in Spain.
  • This study examined WNV exposure in 540 wild lagomorphs in Andalusia, revealing 5% tested positive, with 4.8% of wild rabbits and 0.7% of Iberian hares showing antibodies against the virus.
  • The findings mark the first report of WNV exposure in wild rabbits in Spain and Iberian hares globally, suggesting these animals could help monitor the virus's presence in their ecosystems.
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is a vector-borne zoonotic bacterium that causes tularemia, a disease of great importance for animal and public health. Although wild lagomorphs are considered one of the major reservoirs of this bacterium, information about the circulation of in European wild rabbit () and Iberian hare () populations in Europe is still very limited. In Spain, is present in northern central regions, with recurrent outbreaks occurring annually.

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Evidence of SARS-CoV-2 infections in different animal species raises concerns about the potential for animal reservoirs and transmission to humans. Here, we evaluate the exposure of exotic pet species to this virus throughout the early years of the pandemic (2020 - 2022) in southern Spain. A total of 180 exotic pets (126 domestic rabbits, 31 ferrets, and 23 rodents) were analyzed for antibodies against SARS-CoV-2 using two different ELISAs.

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  • Myxoma (MYXV) and rabbit hemorrhagic disease (RHDV) viruses are significant threats to European rabbits, which are now considered 'Endangered' in their native habitat.
  • The study focused on evaluating the effectiveness of dried blood spots (DBS) for serological surveys of these viruses in European rabbits by comparing DBS to traditional serum samples.
  • Results showed a high level of agreement between the two methods, with DBS demonstrating strong diagnostic sensitivity and perfect specificity for both MYXV and RHDV, confirming its viability for monitoring these diseases in the wild rabbit population.
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The European Food Safety Authority has recently listed Q fever as a priority for setting up a coordinated surveillance system. Although Spain is the country with the highest human incidence of the disease in the European Union, updated data on in ruminants are still limited. A total of 780 serum samples from small ruminants and 605 sera from wild ruminants were collected in the Mediterranean ecosystems of southern Spain during the period 2015-2023.

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Crimean-Congo hemorrhagic fever virus (CCHFV) is an emerging tick-borne pathogen in different European countries. Since 2013, clinical and fatality cases associated with CCHFV infection have been reported in humans in Spain. During the last few years, endemic circulation of this virus has been detected in ticks and wild ungulates in this country, but the role of other sympatric wild species in the sylvatic cycle of this multi-host virus remains poorly understood.

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  • The study investigates the exposure of European wild rabbits and Iberian hares to the parasite Sarcoptes scabiei in southern Spain, highlighting a lack of prior detailed research.
  • Researchers collected serum samples from 464 wild rabbits and 132 Iberian hares over several hunting seasons, finding an overall seroprevalence of 15.9%, with higher rates in Iberian hares (31.1%) compared to wild rabbits (11.6%).
  • Identified risk factors for exposure included species type, age (adults), and geographical area, with significant clusters of high seropositivity detected in western and central Andalusia, indicating the need for enhanced monitoring of this parasite in wild populations.
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  • Circoviruses are known to cause serious diseases in pigs and birds, while canine circovirus primarily affects dogs with respiratory and gastrointestinal issues.
  • A study conducted on 162 spleen samples from the endangered Iberian lynx discovered that 11 samples (6.8%) tested positive for a new circovirus identified as Iberian lynx-associated circovirus-1 (ILCV-1), with a 57.8% infection rate in a subset of 45.
  • The new virus is genetically related to circoviruses found in other carnivores and suggests a potential systemic infection, indicating the need for further research on its health effects on this critically endangered species.
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  • - Wild rabbits and Iberian hares in southern Spain are significant reservoirs for Leishmania infantum, which causes a major outbreak of leishmaniosis in Europe.
  • - A survey from 2018 to 2021 tested 631 animals, finding 56.4% exposed to the parasite, with higher seroprevalence in Iberian hares (19.4%) than in wild rabbits (10.6%).
  • - Key risk factors included the meso-Mediterranean climate and goat presence in hunting grounds, with positive cases found in 64.8% of the sampled locations in Andalusia.
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Background: Coxiella burnetii, the causative agent of Q fever, is a zoonotic multi-host vector-borne pathogen of major public health importance. Although the European Food Safety Authority has recently made the monitoring of this bacterium in wildlife a priority, the role of wild lagomorphs in the transmission and maintenance of C. burnetii is poorly understood.

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We conducted a cross-sectional study in wild boar and extensively managed Iberian pig populations in a hotspot area of Crimean-Congo hemorrhagic fever virus (CCHFV) in Spain. We tested for antibodies against CCHFV by using 2 ELISAs in parallel. We assessed the presence of CCHFV RNA by means of reverse transcription quantitative PCR protocol, which detects all genotypes.

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  • - We found rat hepatitis E virus (HEV) RNA in pigs raised on farms in Spain.
  • - This suggests that pigs could catch rat HEV and potentially transmit it to humans, acting as a link between rodents and people.
  • - Europe needs to check how common rat HEV is in farmed pigs to understand the possible health risks to the public.
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  • In a study of wild and captive Iberian lynxes in Spain, Enterocytozoon bieneusi was found in 3.2% of the animals, but no Encephalitozoon spp. were detected.
  • The research identified four known and one novel genotype of E. bieneusi, suggesting that the Iberian lynx may be a spillover host rather than a primary reservoir, highlighting the need for further studies on its health impact.
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Crimean-Congo hemorrhagic fever virus (CCHFV) is a tick-borne zoonotic orthonairovirus of public health concern and widespread geographic distribution. Several animal species are known to seroconvert after infection with CCHFV without showing clinical symptoms. The commercial availability of a multi-species ELISA has led to an increase in recent serosurveillance studies as well as in the range of species reported to be exposed to CCHFV in the field, including wild boar (Sus scrofa).

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is an important zoonotic pathogen of worldwide distribution that can infect a wide range of wild and domestic species. The European wild rabbit () can play a role as a reservoir for this bacterium in certain epidemiological scenarios, but, to date, a very limited numbers of large-scale serosurveys have been conducted for this species worldwide. Although exposure in hare species has also been described, in Iberian hare () has never been assessed.

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Article Synopsis
  • Major non-viral causes of diarrhea in humans and animals include specific protozoan species, but there's a lack of data on these in free-ranging carnivores, especially the endangered Iberian lynx.
  • In a study of Iberian lynxes in Spain, two protozoan species were detected in small percentages of individuals, indicating the presence of both rodent/leporid-adapted and zoonotic variants.
  • The findings highlight the Iberian lynx's role as a host for these parasites, though the risk of human transmission appears low, pointing to the need for further research on the impact of these infections on the species' health.
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Crimean-Congo haemorrhagic fever (CCHF) virus (CCHFV) is a tick-borne zoonotic pathogen that can cause a lethal haemorrhagic disease in humans. Although the virus appears to be endemically established in the Iberian Peninsula, CCHF is an emerging disease in Spain. Clinical signs of CCHFV infection are mainly manifested in humans, but the virus replicates in several animal species.

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Wild lagomorphs can act as reservoirs of several pathogens of public and animal health concern. However, the number of studies assessing the presence of Anaplasma spp. in these species is scarce.

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Vulture feeding stations (VFS) are strategic sites for the management of ungulate game by-products, with major implications for the conservation of obligate avian scavengers. These feeding points are designed to prevent access by facultative mammalian scavengers and to reduce the risk of trophically transmitted pathogen infection through scavenging behaviour. The aim of this study, using camera trap video recordings, was to evaluate the feeding dynamics around 32 lots of ungulate game by-products deposited in VFS in southern Spain.

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Wild lagomorphs including rabbits and hares can act as natural carriers or reservoirs of bacterial and parasitic zoonotic diseases. However, little is known on the epidemiology and potential public health significance of intestinal eukaryotes in wild leporids. We examined faecal samples from European wild rabbits (Oryctolagus cuniculus, n = 438) and Iberian hares (Lepus granatensis, n = 111) collected in the Autonomous Region of Andalusia in southern Spain during 2012-2021.

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Background: Several species belonging to the genus Ehrlichia are considered pathogenic for animals and humans. Although wildlife are known to play an important role in the epidemiology of these bacteria, information on the role of wild lagomorphs in their sylvatic cycle is limited. Thus, the objective of the present study was to assess the occurrence of Ehrlichia spp.

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A long-term active epidemiological surveillance programme was conducted to determine seroprevalence to myxoma virus (MYXV), infection prevalence and spatiotemporal patterns and factors associated with MYXV circulation in wild rabbits (Oryctolagus cuniculus) in Spanish Mediterranean ecosystems. A total of 2376 animals were sampled over four study periods: 2009-2012 (P1), 2012-2015 (P2), 2015-2018 (P3) and 2018-2021 (P4). Antibodies against MYXV were detected by a commercial indirect ELISA in 59.

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Hepatitis E virus (HEV) is an emerging zoonotic pathogen that is currently recognized as one of the major causes of acute human hepatitis worldwide. In Europe, the increasing number of hepatitis E cases is mainly associated with the consumption of animal food products or contact with infected animals. Dogs and cats have been suggested as a zoonotic source of HEV infection.

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