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https://www.readbyqxmd.com/read/29143248/what-do-dogs-canis-familiaris-see-a-review-of-vision-in-dogs-and-implications-for-cognition-research
#1
Sarah-Elizabeth Byosiere, Philippe A Chouinard, Tiffani J Howell, Pauleen C Bennett
Over the last 20 years, a large amount of research has been conducted in an attempt to uncover the cognitive abilities of the domestic dog. While substantial advancements have been made, progress has been impeded by the fact that little is known about how dogs visually perceive their external environment. It is imperative that future research determines more precisely canine visual processing capabilities, particularly considering the increasing number of studies assessing cognition via paradigms requiring vision...
November 15, 2017: Psychonomic Bulletin & Review
https://www.readbyqxmd.com/read/29142306/an-exome-sequencing-based-approach-for-genome-wide-association-studies-in-the-dog
#2
Bart J G Broeckx, Thomas Derrien, Stéphanie Mottier, Valentin Wucher, Edouard Cadieu, Benoît Hédan, Céline Le Béguec, Nadine Botherel, Kerstin Lindblad-Toh, Jimmy H Saunders, Dieter Deforce, Catherine André, Luc Peelman, Christophe Hitte
Genome-wide association studies (GWAS) are widely used to identify loci associated with phenotypic traits in the domestic dog that has emerged as a model for Mendelian and complex traits. However, a disadvantage of GWAS is that it always requires subsequent fine-mapping or sequencing to pinpoint causal mutations. Here, we performed whole exome sequencing (WES) and canine high-density (cHD) SNP genotyping of 28 dogs from 3 breeds to compare the SNP and linkage disequilibrium characteristics together with the power and mapping precision of exome-guided GWAS (EG-GWAS) versus cHD-based GWAS...
November 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29141765/bionomics-and-spatial-distribution-of-triatomine-vectors-of-trypanosoma-cruzi-in-texas-and-other-southern-states-usa
#3
Rachel Curtis-Robles, Sarah A Hamer, Sage Lane, Michael Z Levy, Gabriel L Hamer
Defining spatial and temporal occurrences of triatomine vectors of Trypanosoma cruzi, the agent of Chagas disease, in the US is critical for public health protection. Through a citizen science program and field collections from 2012 to 2016, we collected 3,215 triatomines, mainly from Texas. Using morphological and molecular approaches, we identified seven Triatoma species and report sex, length, and blood engorgement status. Many citizen-collected triatomines (92.9%) were encountered indoors, in peridomestic settings, or in dog kennels and represent spillover transmission risk of T...
November 6, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/29138393/dogs-and-humans-respond-to-emotionally-competent-stimuli-by-producing-different-facial-actions
#4
Caeiro Cátia, Guo Kun, Mills Daniel
The commonality of facial expressions of emotion has been studied in different species since Darwin, with most of the research focusing on closely related primate species. However, it is unclear to what extent there exists common facial expression in species more phylogenetically distant, but sharing a need for common interspecific emotional understanding. Here we used the objective, anatomically-based tools, FACS and DogFACS (Facial Action Coding Systems), to quantify and compare human and domestic dog facial expressions in response to emotionally-competent stimuli associated with different categories of emotional arousal...
November 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29134762/introduction-of-asian-canine-parvovirus-in-europe-through-dog-importation
#5
F Mira, G Purpari, E Lorusso, S Di Bella, F Gucciardi, C Desario, G Macaluso, N Decaro, A Guercio
Canine parvovirus (CPV) is an important infectious agent of domestic and wild carnivores, responsible for severe and often fatal haemorrhagic gastroenteritis and leukopenia. This paper reports the genomic characterization of a CPV strain collected from a dog recently imported to Italy from Thailand. The virus was detected in all tissue samples collected. The whole genome encompassing the two open reading frames encoding for non-structural (NS1/NS2) and structural (VP1/VP2) proteins was amplified and sequenced...
November 13, 2017: Transboundary and Emerging Diseases
https://www.readbyqxmd.com/read/29134088/on-the-lack-of-a-universal-pattern-associated-with-mammalian-domestication-differences-in-skull-growth-trajectories-across-phylogeny
#6
Marcelo R Sánchez-Villagra, Valentina Segura, Madeleine Geiger, Laura Heck, Kristof Veitschegger, David Flores
As shown in a taxonomically broad study, domestication modifies postnatal growth. Skull shape across 1128 individuals was characterized by 14 linear measurements, comparing 13 pairs of wild versus domesticated forms. Among wild forms, the boar, the rabbit and the wolf have the highest proportion of allometric growth, explaining in part the great morphological diversity of the domesticated forms of these species. Wild forms exhibit more isometric growth than their domesticated counterparts. Multivariate comparisons show that dogs and llamas exhibit the greatest amount of differences in trajectories with their wild counterparts...
October 2017: Royal Society Open Science
https://www.readbyqxmd.com/read/29121815/preclinical-animal-models-for-temporomandibular-joint-tissue-engineering
#7
Alejandro Almarza, Bryan Brown, Boaz Arzi, David Faustino Ângelo, William L Chung, Stephen F Badylak, Michael Scott Detamore
There is a paucity of in vivo studies that investigate the safety and efficacy of temporomandibular joint (TMJ) tissue regeneration approaches, in part due to the lack of established animal models. Review of disease models for study of the TMJ is presented herein with an attempt to identify relevant preclinical animal models for TMJ tissue engineering, with emphasis on the disc and condyle. Although degenerative joint disease models have been mainly performed on mice, rats, and rabbits, pre-clinical regeneration approaches must employ larger animal species...
November 9, 2017: Tissue Engineering. Part B, Reviews
https://www.readbyqxmd.com/read/29119572/use-of-skin-stretchers-for-single-stage-bilateral-mastectomies-in-a-dog-and-a-cat
#8
Yuta Miyazaki, Takeshi Aikawa, Taichi Shimatsu, Masaaki Nishimura, Shigeo Sadahiro
OBJECTIVE: To describe the application of skin stretchers for closure of single-stage bilateral mastectomies in a dog and a cat. STUDY DESIGN: Clinical case report. ANIMALS: A 12-year-old intact female Miniature Dachshund and a 13-year-old spayed female domestic short-hair cat. METHODS: Skin stretchers were applied to the site of the skin adjacent to mammary glands for 2-4 days before surgery. Cable tension was adjusted every 6-8 hours to elongate the skin and to achieve primary closure of single-stage bilateral mastectomy without tension...
November 9, 2017: Veterinary Surgery: VS
https://www.readbyqxmd.com/read/29111373/rickettsia-spp-among-wild-mammals-and-their-respective-ectoparasites-in-pantanal-wetland-brazil
#9
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/29110666/development-of-real-time-recombinase-polymerase-amplification-assay-for-rapid-and-sensitive-detection-of-canine-parvovirus-2
#10
Yunyun Geng, Jianchang Wang, Libing Liu, Yan Lu, Ke Tan, Yan-Zhong Chang
BACKGROUND: Canine parvovirus 2, a linear single-stranded DNA virus belonging to the genus Parvovirus within the family Parvoviridae, is a highly contagious pathogen of domestic dogs and several wild canidae species. Early detection of canine parvovirus (CPV-2) is crucial to initiating appropriate outbreak control strategies. Recombinase polymerase amplification (RPA), a novel isothermal gene amplification technique, has been developed for the molecular detection of diverse pathogens...
November 6, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/29108553/rhinarium-temperature-dynamics-in-domestic-dogs
#11
Ronald Heinz Herbert Kröger, Aitor Bereber Goiricelaya
Many mammals have specialized nose-tips with glabrous and often wet skin, called rhinaria. The function of the rhinarium is unknown in most species. Rhinaria differ not only in shape and skin structure, but also in skin temperature. They are considerably colder in carnivorans than in herbivorous artio- and perissodactyls. Domestic dogs are carnivorans and their noses often feel cold, such that they can be used as an abundant and easily accessible model species. We performed a study on rhinarium temperature in dogs under various ambient temperatures as well as in different behavioral and physiological contexts, breeds, and age groups...
December 2017: Journal of Thermal Biology
https://www.readbyqxmd.com/read/29106561/toward-an-ecological-framework-for-assessing-reservoirs-of-vector-borne-pathogens-wildlife-reservoirs-of-trypanosoma-cruzi-across-the-southern-united-states
#12
Carolyn L Hodo, Sarah A Hamer
Wildlife species are critical for both feeding vectors and serving as reservoirs of zoonotic vector-borne pathogens. Transmission pathways leading to disease in humans or other target taxa might be better understood and managed given a complete understanding of the relative importance of different reservoir species in nature. Using the conceptual framework of "reservoir potential," which considers elements of both reservoir competence and vector-host contact, we review the wildlife reservoirs of Trypanosoma cruzi in the southern United States, where many species of triatomine vectors occur and wildlife maintain enzootic cycles that create a risk of spillover to humans, domestic dogs, and captive nonhuman primates that may develop Chagas disease...
July 6, 2017: ILAR Journal
https://www.readbyqxmd.com/read/29103397/anaplasmataceae-agents-among-wild-mammals-and-ectoparasites-in-brazil
#13
K C M DE Sousa, A C Calchi, H M Herrera, J S Dumler, D M Barros-Battesti, R Z Machado, M R André
Anaplasmataceae agents comprise obligate intracellular bacteria that can cause disease in humans and animals. Between August 2013 and March 2015, 31 Nasua nasua (coati), 78 Cerdocyon thous (crab-eating fox), seven Leopardus pardalis (ocelot), 110 wild rodents, 30 marsupials, and 42 dogs were sampled in the Pantanal wetland, Brazil. In addition, ectoparasites found parasitizing the animals were collected and identified. The present work aimed to investigate the occurrence of Anaplasmataceae agents in wild mammals, domestic dogs and ectoparasites, by molecular and serological techniques...
November 6, 2017: Epidemiology and Infection
https://www.readbyqxmd.com/read/29101539/first-molecular-identification-of-kobuviruses-in-wolves-canis-lupus-in-italy
#14
Irene Melegari, Vittorio Sarchese, Federica Di Profio, Serena Robetto, Emanuele Carella, Sandra Bermudez Sanchez, Riccardo Orusa, Vito Martella, Fulvio Marsilio, Barbara Di Martino
Canine kobuviruses (CaKoVs) were first identified in diarrhoeic and asymptomatic dogs in 2011 in the USA. Subsequent studies have demonstrated a worldwide distribution of these viruses, but it is not clear if CaKoVs play a role as enteric pathogens of dogs. More recently, CaKoV RNA has been detected in wild carnivores, including red fox, golden jackal, side-striped jackal and spotted hyena. In this study, we addressed the hypothesis that wolves are susceptible to CaKoV infections. A total of 185 wolf stool samples were collected from necropsied animals and from transects in the Liguria, Piemonte and Valle D'Aosta regions of Italy, and CaKoV RNA was identified in two of these specimens...
November 3, 2017: Archives of Virology
https://www.readbyqxmd.com/read/29091961/abundance-survival-recruitment-and-effectiveness-of-sterilization-of-free-roaming-dogs-a-capture-and-recapture-study-in-brazil
#15
Vinícius Silva Belo, Claudio José Struchiner, Guilherme Loureiro Werneck, Rafael Gonçalves Teixeira Neto, Gabriel Barbosa Tonelli, Clóvis Gomes de Carvalho Júnior, Renata Aparecida Nascimento Ribeiro, Eduardo Sérgio da Silva
The existence of free-roaming dogs raises important issues in animal welfare and in public health. A proper understanding of these animals' ecology is useful as a necessary input to plan strategies to control these populations. The present study addresses the population dynamics and the effectiveness of the sterilization of unrestricted dogs using capture and recapture procedures suitable for open animal populations. Every two months, over a period of 14 months, we captured, tagged, released and recaptured dogs in two regions in a city in the southeast region of Brazil...
2017: PloS One
https://www.readbyqxmd.com/read/29089919/nasal-oxytocin-treatment-biases-dogs-visual-attention-and-emotional-response-toward-positive-human-facial-expressions
#16
Sanni Somppi, Heini Törnqvist, József Topál, Aija Koskela, Laura Hänninen, Christina M Krause, Outi Vainio
The neuropeptide oxytocin plays a critical role in social behavior and emotion regulation in mammals. The aim of this study was to explore how nasal oxytocin administration affects gazing behavior during emotional perception in domestic dogs. Looking patterns of dogs, as a measure of voluntary attention, were recorded during the viewing of human facial expression photographs. The pupil diameters of dogs were also measured as a physiological index of emotional arousal. In a placebo-controlled within-subjects experimental design, 43 dogs, after having received either oxytocin or placebo (saline) nasal spray treatment, were presented with pictures of unfamiliar male human faces displaying either a happy or an angry expression...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/29084223/molecular-characterization-and-phylogenetic-relatedness-of-dog-derived-rabies-viruses-circulating-in-cameroon-between-2010-and-2016
#17
Serge Alain Sadeuh-Mba, Jean Blaise Momo, Laura Besong, Sévérin Loul, Richard Njouom
Rabies is enzootic among dog populations in some parts of Cameroon and the risk of human rabies is thought to be steadily high in these regions. However, the molecular epidemiology of circulating Rabies Virus (RABV) has been hardly considered in Cameroon as well as in most neighboring central African countries. To address this fundamental gap, 76 nucleoprotein (N) gene sequences of dog-derived RABV were obtained from 100 brain specimens sampled in Cameroon from 2010 to 2016. Studied sequences were subjected to molecular and phylogenetic analyses with reference strains retrieved from databases...
October 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/29080770/atypical-fatal-sarcocystosis-associated-with-sarcocystis-neurona-in-a-white-nosed-coati-nasua-narica-molaris
#18
Jitender P Dubey, John G Trupkiewicz, Shiv K Verma, Joseph D Mowery, Gloria Adedoyin, Tim Georoff, Michael E Grigg
The protozoan parasite Sarcocystis neurona is an important cause of disease in horses (equine protozoal myeloencephalitis, EPM) and marine mammals. Isolated reports of clinical EPM-like disease have been documented in a zebra, raccoon, domestic cat, domestic dog, ferret, skunk, mink, lynx, red panda and fisher. The predominant disease is encephalomyelitis associated with schizonts in neural tissues. Here, we report highly disseminated sarcocystosis, in many tissues of a captive White-nosed coati (Nasua narica molaris)...
November 30, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/29078337/importance-of-a-species-socioecology-wolves-outperform-dogs-in-a-conspecific-cooperation-task
#19
Sarah Marshall-Pescini, Jonas F L Schwarz, Inga Kostelnik, Zsófia Virányi, Friederike Range
A number of domestication hypotheses suggest that dogs have acquired a more tolerant temperament than wolves, promoting cooperative interactions with humans and conspecifics. This selection process has been proposed to resemble the one responsible for our own greater cooperative inclinations in comparison with our closest living relatives. However, the socioecology of wolves and dogs, with the former relying more heavily on cooperative activities, predicts that at least with conspecifics, wolves should cooperate better than dogs...
October 31, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29077073/the-biology-and-ecology-of-cat-fleas-and-advancements-in-their-pest-management-a-review
#20
REVIEW
Michael K Rust
The cat flea Ctenocephalides felis felis (Bouché) is the most important ectoparasite of domestic cats and dogs worldwide. It has been two decades since the last comprehensive review concerning the biology and ecology of C. f. felis and its management. Since then there have been major advances in our understanding of the diseases associated with C. f. felis and their implications for humans and their pets. Two rickettsial diseases, flea-borne spotted fever and murine typhus, have been identified in domestic animal populations and cat fleas...
October 27, 2017: Insects
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