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https://www.readbyqxmd.com/read/28917318/diversity-of-spirocerca-lupi-in-domestic-dogs-and-black-backed-jackals-canis-mesomelas-from-south-africa
#1
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
#2
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
#3
Miletto Petrazzini Maria Elena, 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...
September 9, 2017: Behavioural Processes
https://www.readbyqxmd.com/read/28891169/computed-tomographic-findings-in-three-dogs-naturally-infected-with-crenosoma-vulpis
#4
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
#5
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
#6
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
#7
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
#8
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)...
August 23, 2017: Vector Borne and Zoonotic Diseases
https://www.readbyqxmd.com/read/28830546/the-use-of-primary-murine-fibroblasts-to-ascertain-if-spirocerca-lupi-secretory-excretory-protein-products-are-mitogenic-ex-vivo
#9
Kgomotso Sako, Ilse Jv Rensburg, Sarah Clift, Vinny Naidoo
BACKGROUND: Spirocerca lupi is a nematode that parasitizes vertebrates in particular canids, by forming nodules in the thoracic cavity specifically in the oesophagus. In 25% of Spirocerca infections of the domestic dog, nodules progress from inflammatory to pre-neoplastic to sarcomatous neoplasia. With the mechanism of neoplastic transformation being incompletely understood, this study investigates if S. lupi parasite proteinaceous secretory/excretory products (ESPs) play a role in the neoplastic transformation...
August 22, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/28828280/energetics-and-evasion-dynamics-of-large-predators-and-prey-pumas-vs-hounds
#10
Caleb M Bryce, Christopher C Wilmers, Terrie M Williams
Quantification of fine-scale movement, performance, and energetics of hunting by large carnivores is critical for understanding the physiological underpinnings of trophic interactions. This is particularly challenging for wide-ranging terrestrial canid and felid predators, which can each affect ecosystem structure through distinct hunting modes. To compare free-ranging pursuit and escape performance from group-hunting and solitary predators in unprecedented detail, we calibrated and deployed accelerometer-GPS collars during predator-prey chase sequences using packs of hound dogs (Canis lupus familiaris, 26 kg, n = 4-5 per chase) pursuing simultaneously instrumented solitary pumas (Puma concolor, 60 kg, n = 2)...
2017: PeerJ
https://www.readbyqxmd.com/read/28821188/panmixia-and-limited-interspecific-introgression-in-coyotes-canis-latrans-from-west-virginia-and-virginia-usa
#11
Justin H Bohling, Lauren L Mastro, Jennifer R Adams, Eric M Gese, Sheldon F Owen, Lisette P Waits
The expansion of coyotes (Canis latrans) into the eastern United States has had major consequences for ecological communities and wildlife managers. Despite this, there has been little investigation of the genetics of coyotes across much of this region, especially outside of the northeast. Understanding patterns of genetic structure and interspecific introgression would provide insights into the colonization history of the species, its response to the modern environment, and interactions with other canids. We examined the genetic characteristics of 121 coyotes from the mid-Atlantic states of West Virginia and Virginia by genotyping 17 polymorphic nuclear DNA microsatellite loci...
September 1, 2017: Journal of Heredity
https://www.readbyqxmd.com/read/28807289/neglected-intravascular-pathogens-babesia-vulpes-and-haemotropic-mycoplasma-spp-in-european-red-fox-vulpes-vulpes-population
#12
Martina Koneval, Martina Miterpáková, Zuzana Hurníková, Lucia Blaňarová, Bronislava Víchová
Wild animals, especially canids, are important reservoirs of vector-borne pathogens, that are transmitted by the ticks and other bloodsucking arthropods. In total, 300 red foxes (Vulpes vulpes), shot by the hunters in eastern and northern Slovakia, were screened for the presence of vector-borne pathogens by PCR-based methods Blood samples were obtained from nine red foxes and tissue samples originated from 291 animals (the liver tissue samples from 49 foxes and spleen samples from 242 red foxes). Babesia vulpes and haemotropic Mycoplasma species were identified by amplification and sequencing of 18S rRNA and 16S rRNA gene fragments, respectively...
August 30, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28765810/the-diversity-and-impact-of-hookworm-infections-in-wildlife
#13
REVIEW
Mauricio Seguel, Nicole Gottdenker
Hookworms are blood-feeding nematodes that parasitize the alimentary system of mammals. Despite their high pathogenic potential, little is known about their diversity and impact in wildlife populations. We conducted a systematic review of the literature on hookworm infections of wildlife and analyzed 218 studies qualitative and quantitatively. At least 68 hookworm species have been described in 9 orders, 24 families, and 111 species of wild mammals. Black bears, red foxes, and bobcats harbored the highest diversity of hookworm species and Ancylostoma pluridentatum, A...
December 2017: International Journal for Parasitology. Parasites and Wildlife
https://www.readbyqxmd.com/read/28748783/detection-of-echinococcus-multilocularis-and-other-foodborne-parasites-in-fox-cat-and-dog-faeces-collected-in-kitchen-gardens-in-a-highly-endemic-area-for-alveolar-echinococcosis
#14
Marie-Lazarine Poulle, Matthieu Bastien, Yolan Richard, Émilie Josse-Dupuis, Dominique Aubert, Isabelle Villena, Jenny Knapp
Echinococcus multilocularis, Toxoplasma gondii and Toxocara spp. are foodborne parasites whose eggs or oocysts are spread in the environment via canid or felid faeces. They can cause infections in humans following the raw consumption of contaminated fruit or vegetables. In this study, their occurrence was investigated by quantitative polymerase chain reaction (qPCR) in 254 carnivore faeces deposited in 94 kitchen gardens of northeastern France that were sampled between two and six times from October 2011 to April 2013...
2017: Parasite: Journal de la Société Française de Parasitologie
https://www.readbyqxmd.com/read/28741339/the-enzymes-and-electrolytes-profiles-in-sera-of-iranian-stray-dogs-naturally-infected-with-neospora-caninum
#15
Mohammad Yakhchali, Milad Bahrami, Siamak Asri-Rezaei, Saied Bokaie
The protozoan Neospora caninum (Apicomplexa: Sarcocystidae), respectively infects canids and ruminants as the most definitive and intermediate hosts. A diagnosis of neosporosis is generally made on the basis of clinical signs together with the detection of high levels of antibodies in serum. The present study compares the serum electrolyte profile (Ca, K, Mg, Na, P) and serum enzyme level (ALP, AST, CPK) of non-infected dogs with those of stray dogs naturally infected with N. caninum. The indirect fluorescent antibody test (IFAT) revealed that 17 of the 137 analysed serum samples (12...
2017: Annals of Parasitology
https://www.readbyqxmd.com/read/28729263/complete-genomic-sequence-of-canine-distemper-virus-from-an-ethiopian-wolf
#16
Denise A Marston, Jemma Watson, Emma L Wise, Richard J Ellis, Eric Bedin, Girma Ayalew, Muktar Abute, Xavier de Lamballerie, Anthony R Fooks, Claudio Sillero-Zubiri, Ashley C Banyard
Canine distemper virus (CDV) has been implicated in population declines of wildlife, including many threatened species. Here we present the full genome of CDV from an Ethiopian wolf, Canis simensis, the world's rarest and most endangered canid.
July 20, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28725102/the-influence-of-social-relationship-on-food-tolerance-in-wolves-and-dogs
#17
Rachel Dale, Friederike Range, Laura Stott, Kurt Kotrschal, Sarah Marshall-Pescini
ABSTRACT: Food sharing is relatively widespread across the animal kingdom, but research into the socio-ecological factors affecting this activity has predominantly focused on primates. These studies do suggest though that food tolerance is linked to the social relationship with potential partners. Therefore, the current study aimed to assess the social factors which influence food tolerance in two canids: wolves and dogs. We presented wolves and dogs with two paradigms: dyadic tolerance tests and group carcass feedings...
2017: Behavioral Ecology and Sociobiology
https://www.readbyqxmd.com/read/28687738/a-possible-origin-population-of-pathogenic-intestinal-nematodes-strongyloides-stercoralis-unveiled-by-molecular-phylogeny
#18
Eiji Nagayasu, Myo Pa Pa Thet Hnin Htwe Aung, Thanaporn Hortiwakul, Akina Hino, Teruhisa Tanaka, Miwa Higashiarakawa, Alex Olia, Tomoyo Taniguchi, Soe Moe Thu Win, Isao Ohashi, Emmanuel Igwaro Odongo-Aginya, Khin Myo Aye, Mon Mon, Kyu Kyu Win, Kei Ota, Yukari Torisu, Siripen Panthuwong, Eisaku Kimura, Nirianne M Q Palacpac, Taisei Kikuchi, Tetsuo Hirata, Shidow Torisu, Hajime Hisaeda, Toshihiro Horii, Jiro Fujita, Wah Win Htike, Haruhiko Maruyama
Humans and dogs are the two major hosts of Strongyloides stercoralis, an intestinal parasitic nematode. To better understand the phylogenetic relationships among S. stercoralis isolates infecting humans and dogs and to assess the zoonotic potential of this parasite, we analyzed mitochondrial Cox1, nuclear 18S rDNA, 28S rDNA, and a major sperm protein domain-containing protein genes. Overall, our analyses indicated the presence of two distinct lineages of S. stercoralis (referred to as type A and type B). While type A parasites were isolated both from humans and dogs in different countries, type B parasites were found exclusively in dogs, indicating that the type B has not adapted to infect humans...
July 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28680689/rensching-cats-and-dogs-feeding-ecology-and-fecundity-trends-explain-variation-in-the-allometry-of-sexual-size-dimorphism
#19
P J Johnson, M J Noonan, A C Kitchener, L A Harrington, C Newman, D W Macdonald
The tendency for sexual size dimorphism (SSD) to increase with body mass in taxa where males are larger, and to decrease when females are larger, is known as Rensch's rule. In mammals, where the trend occurs, it is believed to be the result of a competitive advantage for larger males, while female mass is constrained by the energetics of reproduction. Here, we examine the allometry of SSD within the Felidae and Canidae, demonstrating distinctly different patterns: in felids, there is positive allometric scaling, while there is no trend in canids...
June 2017: Royal Society Open Science
https://www.readbyqxmd.com/read/28680672/phylogenetic-evidence-for-the-ancient-himalayan-wolf-towards-a-clarification-of-its-taxonomic-status-based-on-genetic-sampling-from-western-nepal
#20
Geraldine Werhahn, Helen Senn, Jennifer Kaden, Jyoti Joshi, Susmita Bhattarai, Naresh Kusi, Claudio Sillero-Zubiri, David W Macdonald
Wolves in the Himalayan region form a monophyletic lineage distinct from the present-day Holarctic grey wolf Canis lupus spp. (Linnaeus 1758) found across Eurasia and North America. Here, we analyse phylogenetic relationships and the geographic distribution of mitochondrial DNA haplotypes of the contemporary Himalayan wolf (proposed in previous studies as Canis himalayensis) found in Central Asia. We combine genetic data from a living Himalayan wolf population collected in northwestern Nepal in this study with already published genetic data, and confirm the Himalayan wolf lineage based on mitochondrial genomic data (508 bp cytochrome b and 242 bp D-loop), and X- and Y-linked zinc-finger protein gene (ZFX and ZFY) sequences...
June 2017: Royal Society Open Science
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