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https://www.readbyqxmd.com/read/29156583/new-paradigms-for-the-study-of-ocular-alphaherpesvirus-infections-insights-into-the-use-of-non-traditional-host-model-systems
#1
REVIEW
Matthew R Pennington, Eric C Ledbetter, Gerlinde R Van de Walle
Ocular herpesviruses, most notably human alphaherpesvirus 1 (HSV-1), canid alphaherpesvirus 1 (CHV-1) and felid alphaherpesvirus 1 (FHV-1), infect and cause severe disease that may lead to blindness. CHV-1 and FHV-1 have a pathogenesis and induce clinical disease in their hosts that is similar to HSV-1 ocular infections in humans, suggesting that infection of dogs and cats with CHV-1 and FHV-1, respectively, can be used as a comparative natural host model of herpesvirus-induced ocular disease. In this review, we discuss both strengths and limitations of the various available model systems to study ocular herpesvirus infection, with a focus on the use of these non-traditional virus-natural host models...
November 18, 2017: Viruses
https://www.readbyqxmd.com/read/29152188/prey-use-by-dingoes-in-a-contested-landscape-ecosystem-service-provider-or-biodiversity-threat
#2
Damian S Morrant, Christopher M Wurster, Christopher N Johnson, James R A Butler, Bradley C Congdon
In Australia, dingoes (Canis lupus dingo) have been implicated in the decline and extinction of a number of vertebrate species. The lowland Wet Tropics of Queensland, Australia is a biologically rich area with many species of rainforest-restricted vertebrates that could be threatened by dingoes; however, the ecological impacts of dingoes in this region are poorly understood. We determined the potential threat posed by dingoes to native vertebrates in the lowland Wet Tropics using dingo scat/stomach content and stable isotope analyses of hair from dingoes and potential prey species...
November 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/29152186/cumulative-effects-of-climate-and-landscape-change-drive-spatial-distribution-of-rocky-mountain-wolverine-gulo-gulo-l
#3
Nicole Heim, Jason T Fisher, Anthony Clevenger, John Paczkowski, John Volpe
Contemporary landscapes are subject to a multitude of human-derived stressors. Effects of such stressors are increasingly realized by population declines and large-scale extirpation of taxa worldwide. Most notably, cumulative effects of climate and landscape change can limit species' local adaptation and dispersal capabilities, thereby reducing realized niche space and range extent. Resolving the cumulative effects of multiple stressors on species persistence is a pressing challenge in ecology, especially for declining species...
November 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/29131852/unraveling-the-key-to-the-resistance-of-canids-to-prion-diseases
#4
Natalia Fernández-Borges, Beatriz Parra, Enric Vidal, Hasier Eraña, Manuel A Sánchez-Martín, Jorge de Castro, Saioa R Elezgarai, Martí Pumarola, Tomás Mayoral, Joaquín Castilla
One of the characteristics of prions is their ability to infect some species but not others and prion resistant species have been of special interest because of their potential in deciphering the determinants for susceptibility. Previously, we developed different in vitro and in vivo models to assess the susceptibility of species that were erroneously considered resistant to prion infection, such as members of the Leporidae and Equidae families. Here we undertake in vitro and in vivo approaches to understand the unresolved low prion susceptibility of canids...
November 13, 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/29119703/rickettsia-parkeri-in-free-ranging-wild-canids-from-brazilian-pampa
#5
B Dall'Agnol, U A Souza, B Weck, T C Trigo, M M A Jardim, F B Costa, M B Labruna, F B Peters, M O Favarini, F D Mazim, C A S Ferreira, J Reck
Spotted fevers are tick-borne diseases associated with various Rickettsia species. Rickettsia parkeri sensu stricto (s.s.) is the agent of an emerging eschar-associated rickettsiosis in humans from the USA and South American Pampa. Considering that R. parkeri s.s. is restricted to Americas and the potential role of dogs in the epidemiology of the disease, it is thus reasonable to hypothesize that wild canids could be involved in the enzootic cycle of this rickettsiosis. The aim of this work was to investigate the potential role of the wild canids from Pampa, Cerdocyon thous (crab-eating fox) and Lycalopex gymnocercus (Pampas fox), in the ecology of R...
November 8, 2017: Transboundary and Emerging Diseases
https://www.readbyqxmd.com/read/29111373/rickettsia-spp-among-wild-mammals-and-their-respective-ectoparasites-in-pantanal-wetland-brazil
#6
Keyla Carstens Marques de Sousa, Heitor Miraglia Herrera, Fabiana Lopes Rocha, Francisco Borges Costa, Thiago Fernandes Martins, Marcelo Bahia Labruna, Rosangela Zacarias Machado, Marcos Rogério André
The genus Rickettsia comprises obligatory intracellular bacteria, well known to cause zoonotic diseases around the world. The present work aimed to investigate the occurrence of Rickettsia spp. in wild animals, domestic dogs and their respective ectoparasites in southern Pantanal region, central-western Brazil, by molecular and serological techniques. Between August 2013 and March 2015, serum, whole blood and/or spleen samples were collected from 31 coatis, 78 crab-eating foxes, seven ocelots, 42 dogs, 110 wild rodents, and 30 marsupials...
October 27, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/29052521/high-seroprevalance-of-neospora-caninum-in-dogs-in-victoria-australia-compared-to-20%C3%A2-years-ago
#7
Sarah Sloan, Jan Šlapeta, Abdul Jabbar, Jaimie Hunnam, Bert De Groef, Grant Rawlin, Christina McCowan
BACKGROUND: Canids are definitive hosts of the apicomplexan parasite Neospora caninum, the leading cause of abortion in cattle worldwide. For horizontal transmission from canids to occur, oocysts of N. caninum must be shed by the definitive host into the environment of susceptible intermediate hosts such as cattle. The purpose of this study was to determine the prevalence of N. caninum in canids in Victoria, Australia's leading dairy producing state. RESULTS: Neospora-like oocysts were observed in 8% (18/234) of faecal samples from wild dogs, domestic dogs and red foxes from Victoria, Australia...
October 19, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/29046813/single-nucleotide-polymorphisms-and-microsatellites-in-the-canine-glutathione-s-transferase-pi-1-gstp1-gene-promoter
#8
James Sacco, Sarah Mann, Keller Toral
BACKGROUND: Genetic polymorphisms within the glutathione S-transferase P1 (GSTP1) gene affect the elimination of toxic xenobiotics by the GSTP1 enzyme. In dogs, exposure to environmental chemicals that may be GSTP1 substrates is associated with cancer. The objectives of this study were to investigate the genetic variability in the GSTP1 promoter in a diverse population of 278 purebred dogs, compare the incidence of any variants found between breeds, and predict their effects on gene expression...
2017: Canine Genetics and Epidemiology
https://www.readbyqxmd.com/read/29035862/first-report-of-pneumonia-caused-by-angiostrongylus-vasorum-in-a-golden-jackal
#9
Pavle Gavrilović, Darko Marinković, Igor Todorović, Aleksandra Gavrilović
Angiostrongylosis caused by metastrongyloid nematode Angiostrongylus vasorum is an emerging parasitic disease in Europe and the red fox (Vulpes vulpes) is considered as a main reservoir species for this parasite. Little is known about the role of other wild canids in the epidemiology of angiostrongylosis. The present paper provides the first description of pathomorphological lesions caused by A. vasorum in a golden jackal (Canis aureus). The paper describes a case of co-infection with A. vasorum and Dirofilaria immitis in a one-year-old female golden jackal, legally hunted near the City of Kovin, South Banat, Serbia...
December 20, 2017: Acta Parasitologica
https://www.readbyqxmd.com/read/28985326/the-effects-of-captivity-on-the-mammalian-gut-microbiome
#10
Valerie J McKenzie, Se Jin Song, Frédéric Delsuc, Tiffany L Prest, Angela M Oliverio, Timothy M Korpita, Alexandra Alexiev, Katherine R Amato, Jessica L Metcalf, Martin Kowalewski, Nico L Avenant, Andres Link, Anthony Di Fiore, Andaine Seguin-Orlando, Claudia Feh, Ludovic Orlando, Joseph R Mendelson, Jon Sanders, Rob Knight
Recent studies increasingly note the effect of captivity or the built environment on the microbiome of humans and other animals. As symbiotic microbes are essential to many aspects of biology (e.g., digestive and immune functions), it is important to understand how lifestyle differences can impact the microbiome, and, consequently, the health of hosts. Animals living in captivity experience a range of changes that may influence the gut bacteria, such as diet changes, treatments, and reduced contact with other individuals, species and variable environmental substrates that act as sources of bacterial diversity...
August 7, 2017: Integrative and Comparative Biology
https://www.readbyqxmd.com/read/28971014/occurrence-of-tongue-worm-linguatula-cf-serrata-pentastomida-linguatulidae-in-wild-canids-and-livestock-in-south-eastern-australia
#11
Shokoofeh Shamsi, Kate McSpadden, Sara Baker, David J Jenkins
Pentastomids are obligate zoonotic arthropod parasites utilising canids and vulpids as their definitive hosts and several herbivorous species as their intermediate hosts. Reported only 10 times in Australia over the last 150 years as incidental findings, adult Pentastomids referred to as Linguatula serrata have been encountered in nasal cavities of domestic and wild dogs, and foxes. Nymphs have been reported in cattle and rabbits. In the present study, a number of potential definitive hosts, including red foxes (Vulpes vulpes), wild dogs (Canis lupus dingo and C...
December 2017: International Journal for Parasitology. Parasites and Wildlife
https://www.readbyqxmd.com/read/28951833/surrogate-hosts-hunting-dogs-and-recolonizing-grey-wolves-share-their-endoparasites
#12
Ines Lesniak, Mathias Franz, Ilja Heckmann, Alex D Greenwood, Heribert Hofer, Oliver Krone
Understanding how closely related wildlife species and their domesticated counterparts exchange or share parasites, or replace each other in parasite life cycles, is of great interest to veterinary and human public health, and wildlife ecology. Grey wolves (Canis lupus) host and spread endoparasites that can either directly infect canid conspecifics or their prey serving as intermediate hosts of indirectly transmitted species. The wolf recolonization of Central Europe represents an opportunity to study parasite transmission dynamics between wildlife and domestic species for cases when a definitive host returns after local extinction - a situation equivalent to a 'removal experiment'...
December 2017: International Journal for Parasitology. Parasites and Wildlife
https://www.readbyqxmd.com/read/28917318/diversity-of-spirocerca-lupi-in-domestic-dogs-and-black-backed-jackals-canis-mesomelas-from-south-africa
#13
Wiekolize Rothmann, Pamela J de Waal
Spirocerca lupi is a parasitic nematode that causes spirocercosis predominantly in domestic dogs. Spirocerca lupi nematode samples were collected from four regions around South Africa and analyzed to compare the genetic diversity among the regions. A total of 56 S. lupi nematodes were obtained by necropsy from domestic dogs and wild black-backed jackals (Canis mesomelas). Sixteen different haplotypes of cox1 were identified some of which are shared between regions as well as with black-backed jackal. The genetic similarity between S...
September 15, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28913904/re-emergence-of-rabies-virus-maintained-by-canid-populations-in-paraguay
#14
A C F Amarilla, J C A Pompei, D B Araujo, F A Vázquez, R R Galeano, L M Delgado, G Bogado, M Colman, L Sanabria, K Iamamoto, R Garcia, D Assis, R Recalde, L F Martorelli, E Quiñones, A Cabello, M Martini, O Cosivi, E L Durigon, S R Favoretto
Paraguay has registered no human cases of rabies since 2004, and the last case in dogs, reported in 2009, was due to a variant maintained in the common vampire bat "Desmodus rotundus". In 2014, a dog was diagnosed as positive for rabies with aggression towards a boy and all required measures of control were successfully adopted. Epidemiological investigation revealed that the dog was not vaccinated and had been attacked by a crab-eating fox, "zorro" (Cerdocyon thous). The sample was diagnosed by the Official Veterinary Service of the Country and sent to the Center on Rabies Research from the University of São Paulo, Brazil, for antigenic and genetic characterization...
September 14, 2017: Zoonoses and Public Health
https://www.readbyqxmd.com/read/28899810/quantity-discrimination-in-canids-dogs-canis-familiaris-and-wolves-canis-lupus-compared
#15
Maria Elena Miletto Petrazzini, Clive D L Wynne
Accumulating evidence indicates that animals are able to discriminate between quantities. Recent studies have shown that dogs' and coyotes' ability to discriminate between quantities of food items decreases with increasing numerical ratio. Conversely, wolves' performance is not affected by numerical ratio. Cross-species comparisons are difficult because of differences in the methodologies employed, and hence it is still unclear whether domestication altered quantitative abilities in canids. Here we used the same procedure to compare pet dogs and wolves in a spontaneous food choice task...
November 2017: Behavioural Processes
https://www.readbyqxmd.com/read/28891169/computed-tomographic-findings-in-three-dogs-naturally-infected-with-crenosoma-vulpis
#16
Jeremy R Mortier, Caroline J Fina, Elsa Edery, Crystal L White, Marc P Dhumeaux
Crenosoma vulpis is a nematode lungworm found in wild and domestic canids in some parts of North America and Europe. Reported radiographic findings are nonspecific and consist of a combination of bronchial and interstitial changes of variable severity. This retrospective, case series study aimed to describe thoracic computed tomographic (CT) findings for a group of dogs with confirmed crenosomosis. Selection criteria were presentation with a chronic cough during the period of January 2016 to February 2017, evaluation by thoracic CT, and final diagnosis of C...
September 10, 2017: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/28865771/can-skull-form-predict-the-shape-of-the-temporomandibular-joint-a-study-using-geometric-morphometrics-on-the-skulls-of-wolves-and-domestic-dogs
#17
Stefan Curth, Martin S Fischer, Kornelius Kupczik
The temporomandibular joint (TMJ) conducts and restrains masticatory movements between the mammalian cranium and the mandible. Through this functional integration, TMJ morphology in wild mammals is strongly correlated with diet, resulting in a wide range of TMJ variations. However, in artificially selected and closely related domestic dogs, dietary specialisations between breeds can be ruled out as a diversifying factor although they display an enormous variation in TMJ morphology. This raises the question of the origin of this variation...
September 1, 2017: Annals of Anatomy, Anatomischer Anzeiger: Official Organ of the Anatomische Gesellschaft
https://www.readbyqxmd.com/read/28842717/three-dimensional-geometric-morphometric-analysis-of-fossil-canid-mandibles-and-skulls
#18
Abby Grace Drake, Michael Coquerelle, Pavel A Kosintsev, Olga P Bachura, Mikhail Sablin, Andrei V Gusev, Lacey S Fleming, Robert J Losey
Much of the fossil record for dogs consists of mandibles. However, can fossil canid mandibles be reliably identified as dogs or wolves? 3D geometric morphometric analysis correctly classifies 99.5% of the modern dog and wolf mandibles. However, only 4 of 26 Ust'-Polui fossil mandibles, a Russian Arctic site occupied from 250BCE to 150CE, were identified as dogs and none of the 20 Ivolgin mandibles, an Iron Age site in southern Russia, were identified as dogs. Three of the Ust'-Polui mandibles and 8 of the Ivolgin mandibles were identified as wolves...
August 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28835291/occurrence-and-diversity-of-arthropod-transmitted-pathogens-in-red-foxes-vulpes-vulpes-in-western-austria-and-possible-vertical-transplacental-transmission-of-hepatozoon-canis
#19
Adnan Hodžić, Naike Mrowietz, Rita Cézanne, Pia Bruckschwaiger, Sylvia Punz, Verena Elisabeth Habler, Valentina Tomsik, Judit Lazar, Georg G Duscher, Walter Glawischnig, Hans-Peter Fuehrer
Red fox (Vulpes vulpes) is the most abundant wild canid species in Austria, and it is a well-known carrier of many pathogens of medical and veterinary concern. The main aim of the present study was to investigate the occurrence and diversity of protozoan, bacterial and filarial parasites transmitted by blood-feeding arthropods in a red fox population in western Austria. Blood (n = 351) and spleen (n = 506) samples from foxes were examined by PCR and sequencing and the following pathogens were identified: Babesia canis, Babesia cf...
August 24, 2017: Parasitology
https://www.readbyqxmd.com/read/28832257/survey-of-the-occurrence-and-human-infective-potential-of-giardia-duodenalis-and-cryptosporidium-spp-in-wastewater-and-different-surface-water-sources-of-western-romania
#20
Kálmán Imre, Adriana Morar, Marius S Ilie, Judit Plutzer, Mirela Imre, Tîrziu Emil, Mihai V Herbei, Gheorghe Dărăbuș
From the group of parasitic protozoa, Giardia and Cryptosporidium are the most common pathogens spread in surface water sources, representing a continuous threat to public health and water authorities. The aim of this survey was to assess the occurrence and human infective potential of these pathogens in treated wastewaters and different surface water sources. A total of 76 western Romanian water bodies in four counties (Arad, Bihor, Caraș-Severin and Timiș) were investigated, including the effluents of wastewater treatment plants (n = 11) and brooks (n = 19), irrigation channels (n = 8), lakes (n = 16), and ponds (n = 22)...
October 2017: Vector Borne and Zoonotic Diseases
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