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https://www.readbyqxmd.com/read/28433728/vector-competence-of-amblyomma-americanum-acari-ixodidae-for-rickettsia-rickettsii
#1
Michael L Levin, Galina E Zemtsova, Lindsay F Killmaster, Alyssa Snellgrove, Lauren B M Schumacher
Rickettsia rickettsii - the etiologic agent of Rocky Mountain spotted fever (RMSF) - is widely spread across the Americas. In the US, Dermacentor spp. ticks are identified as primary vectors of R. rickettsii and Rhipicephalus sanguineus s.l. has been implicated in transmission of this pathogen in several locations in the Southwest. Conversely, ticks of the genus Amblyomma are recognized vectors of RMSF in Central and South America, but not in the US. A. americanum is one of the most aggressive human-biting ticks in the US, whose geographical range overlaps with that of reported RMSF cases...
April 12, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28423053/-she-s-a-dog-at-the-end-of-the-day-guide-dog-owners-perspectives-on-the-behaviour-of-their-guide-dog
#2
Peter J Craigon, Pru Hobson-West, Gary C W England, Chantelle Whelan, Emma Lethbridge, Lucy Asher
A guide dog is a domestic dog (Canis familiaris) that is specifically educated to provide mobility support to a blind or visually impaired owner. Current dog suitability assessments focus on behavioural traits, including: trainability, reactivity or attention to environmental stimuli, low aggressiveness, fearfulness and stress behaviour, energy levels, and attachment behaviour. The aim of this study was to find out which aspects of guide dog behaviour are of key importance to guide dog owners themselves. Sixty-three semi-structured interview surveys were carried out with guide dog owners...
2017: PloS One
https://www.readbyqxmd.com/read/28421298/dog-rivalry-impacts-following-behavior-in-a-decision-making-task-involving-food
#3
Christy L Hoffman, Malini Suchak
Dogs learn a great deal from humans and other dogs. Previous studies of socially influenced learning between dogs have typically used a highly trained demonstrator dog who is unfamiliar to the observer. Because of this, it is unknown how dynamics between familiar dogs may influence their likelihood of learning from each other. In this study, we tested dogs living together in two-dog households on whether individual dogs' rivalry scores were associated with performance on a local enhancement task. Specifically, we wanted to know whether dog rivalry impacted whether an observer dog would approach a plate from which a demonstrator dog had eaten all available food, or whether the observer dog would approach the adjacent plate that still contained food...
April 18, 2017: Animal Cognition
https://www.readbyqxmd.com/read/28420038/retrospective-evaluation-of-coyote-attacks-in-dogs-154-cases-1997-2012
#4
Virginia M Frauenthal, Philip Bergman, Robert J Murtaugh
OBJECTIVE: To describe the clinical presentation and outcome of known attacks in client-owned dogs caused by the common coyote, Canis latrans. DESIGN: Retrospective observational study. SETTING: Private referral hospital. ANIMALS: One hundred fifty-four client-owned dogs known to be attacked by coyotes. INTERVENTIONS: None. MEASUREMENTS AND MAIN RESULTS: Records from a private referral hospital from May 1997 through December 2012 were reviewed...
April 18, 2017: Journal of Veterinary Emergency and Critical Care
https://www.readbyqxmd.com/read/28419676/efficacy-of-dacarbazine-as-a-rescue-agent-for-histiocytic-sarcoma-in-dogs
#5
K A Kezer, L G Barber, S H Jennings
BACKGROUND: Canine histiocytic sarcoma (HS) is an aggressive neoplasm that is generally associated with a poor prognosis. CCNU is considered first-line medical therapy, although the majority of dogs ultimately develop progressive disease. The objective of this study was to evaluate the efficacy of dacarbazine as a rescue agent for HS. MATERIALS AND METHODS: Medical records of dogs diagnosed with HS that received at least one dose of dacarbazine were reviewed. Information collected and analyzed included signalment, disease distribution, treatment history, dacarbazine treatments (including dose, interval and total number of cycles), adverse events, and response to treatment...
April 17, 2017: Veterinary and Comparative Oncology
https://www.readbyqxmd.com/read/28417004/the-effect-of-relatedness-and-pack-size-on-territory-overlap-in-african-wild-dogs
#6
Craig R Jackson, Rosemary J Groom, Neil R Jordan, J Weldon McNutt
BACKGROUND: Spacing patterns mediate competitive interactions between conspecifics, ultimately increasing fitness. The degree of territorial overlap between neighbouring African wild dog (Lycaon pictus) packs varies greatly, yet the role of factors potentially affecting the degree of overlap, such as relatedness and pack size, remain unclear. We used movement data from 21 wild dog packs to calculate the extent of territory overlap (20 dyads). RESULTS: On average, unrelated neighbouring packs had low levels of overlap restricted to the peripheral regions of their 95% utilisation kernels...
2017: Movement Ecology
https://www.readbyqxmd.com/read/28414470/association-between-lateral-bias-and-personality-traits-in-the-domestic-dog-canis-familiaris
#7
Shanis Barnard, Deborah L Wells, Peter G Hepper, Adam D S Milligan
Behavioral laterality reflects the cerebral functional asymmetry. Measures of laterality have been associated with emotional stress, problem-solving, and personality in some vertebrate species. Thus far, the association between laterality and personality in the domestic dog has been largely overlooked. In this study, we investigated whether lateralized (left or right) and ambilateral dogs differed in their behavioral response to a standardized personality test. The dog's preferred paw to hold a Kong ball filled with food and the first paw used to step-off from a standing position were scored as laterality measures...
April 17, 2017: Journal of Comparative Psychology
https://www.readbyqxmd.com/read/28396780/superior-orbitectomy-and-chemotherapy-in-a-dog-with-frontal-sinus-squamous-cell-carcinoma-a-case-report-and-review-of-the-literature
#8
Andrea Steinmetz
A superior orbitectomy can be a challenging but accomplishable surgical option in dogs with a tumor which involves the dorsal bony part of the orbit. The procedure described in this report can be vision-sparing and life prolonging even in a case of an aggressive growing frontal sinus squamous cell carcinoma.
April 2017: Clinical Case Reports
https://www.readbyqxmd.com/read/28378427/comparative-assessment-of-the-accuracy-of-cytological-and-histologic-biopsies-in-the-diagnosis-of-canine-bone-lesions
#9
S Sabattini, A Renzi, P Buracco, S Defourny, M Garnier-Moiroux, O Capitani, G Bettini
BACKGROUND: Osteosarcoma (OSA) should be differentiated from other less frequent primary bone neoplasms, metastatic disease, and tumor-like lesions, as treatment and prognosis can vary accordingly. Hence, a preoperative histologic diagnosis is generally preferred. This requires collection of multiple biopsies under general anesthesia, with possible complications, including pathological fractures. Fine-needle aspiration cytology would allow an earlier diagnosis with a significant reduction of discomfort and morbidity...
April 4, 2017: Journal of Veterinary Internal Medicine
https://www.readbyqxmd.com/read/28365927/validation-of-the-socially-acceptable-behaviour-sab-test-in-a-central%C3%A2-italy-pet-dog-population
#10
Paolo Dalla Villa, Shanis Barnard, Antonio Di Nardo, Luigi Iannetti, Michele Podaliri Vulpiani, Roberto Trentini, James A Serpell, Carlo Siracusa
Aggressiveness is reported to be the most important public health issue related to both owned and free‑roaming dogs. Common approaches to assess canine aggressiveness are temperament tests. The main aim of this study was to evaluate whether one such test, the Socially Acceptable Behaviour (SAB) test, created to evaluate aggressive and fearful behaviour in dogs in the Netherlands, could be used reliably to assess dog aggression and fear in a population of owned dogs in Central Italy. Reactions to the test were recorded and compared to the owners' perception of their dog's aggressiveness using a validated questionnaire (C‑BARQ)...
March 31, 2017: Veterinaria Italiana
https://www.readbyqxmd.com/read/28274585/factors-associated-with-canine-resource-guarding-behaviour-in-the-presence-of-dogs-a-cross-sectional-survey-of-dog-owners
#11
Jacquelyn A Jacobs, Jason B Coe, David L Pearl, Tina M Widowski, Lee Niel
Resource guarding (RG) involves the use of specific behaviour patterns to control access to an item of potential "value" (as perceived by the dog), and can be expressed in the presence of various animals, including other dogs. The current study aimed to identify factors associated with RG patterns expressed around other dogs. Dog owners (n=3068) were recruited through social media to answer questions regarding dog- and household-related factors, as well as their dog's current and past behaviour around resources in the presence of other dogs...
February 20, 2017: Preventive Veterinary Medicine
https://www.readbyqxmd.com/read/28268035/factors-associated-with-canine-resource-guarding-behaviour-in-the-presence-of-people-a-cross-sectional-survey-of-dog-owners
#12
Jacquelyn A Jacobs, Jason B Coe, David L Pearl, Tina M Widowski, Lee Niel
Resource guarding (RG) involves the use of specific behaviour patterns to control access to an item of potential "value" to the dog. Of particular concern are patterns involving aggression, due to safety concerns, but other patterns of RG behaviour are prevalent and include avoidance (i.e., positioning of the head or body to maintain item control, or location change with the item) and rapid ingestion (i.e., rapid ingestion of a consumable item). Current research has not investigated the etiology of RG aggression in depth, nor have the additional patterns of resource guarding been considered...
February 17, 2017: Preventive Veterinary Medicine
https://www.readbyqxmd.com/read/28263765/exogenous-testosterone-decreases-men-s-personal-distance-in-a-social-threat-context
#13
Lisa Wagels, Sina Radke, Katharina Sophia Goerlich, Ute Habel, Mikhail Votinov
BACKGROUND: Testosterone can motivate human approach and avoidance behavior. Specifically, the conscious recognition of and implicit reaction to angry facial expressions is influenced by testosterone. The study tested whether exogenous testosterone modulates the personal distance (PD) humans prefer in a social threat context. METHODS: 82 healthy male participants underwent either transdermal testosterone (testosterone group) or placebo application (placebo group)...
March 11, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28253727/gastrointestinal-stromal-tumor-after-tyrosine-kinase-inhibition-therapy-a-review-of-biopsies-of-34-patients-with-clinically-suspected-relapse-and-or-progression-of-the-tumor
#14
L Plank, V BuzalkovA, P SzEpe, Z LasabovA, K JaSek, A StanclovA, G MinArik, J Sufliarsky
Implementation of combined surgical and targeted therapy strategies using tyrosine kinase inhibitors improved the prognosis of patients with aggressive GISTs. The therapeutic answer may be individually different, some patients do not respond properly, or even progress in spite of the therapy. This together with intratumoral heterogeneity and possible development of secondary phenotypical and genetical changes represents a challenge for pathologists examining a biopsy of relapsed tumors and/or their metastases...
March 3, 2017: Neoplasma
https://www.readbyqxmd.com/read/28221318/evaluating-and-treating-mammalian-bites
#15
Donna Rasmussen, Alexandra Landon, Jennifer Powell, Gina R Brown
Mammalian bites, typically from dogs, cats, or humans, are a common presentation in EDs and family practice settings, and patients present with varying degrees of complexity. Injuries can range from local to systemic, including aggressive bacterial infections and permanent limb impairment. Using a systematic approach to initial wound assessment, followed by appropriate diagnostic testing and treatment, is critical to improved long-term patient outcomes.
March 2017: JAAPA: Official Journal of the American Academy of Physician Assistants
https://www.readbyqxmd.com/read/28197406/long-term-formation-of-aggressive-bony-lesions-in-dogs-with-mid-diaphyseal-fractures-stabilized-with-metallic-plates-incidence-in-a-tertiary-referral-hospital-population
#16
Robert S Gilley, Elizabeth Hiebert, Kemba Clapp, Lara Bartl-Wilson, Michael Nappier, Stephen Werre, Katherine Barnes
The incidence of complications secondary to fracture stabilization, particularly osteolytic lesions and bony tumor formation, has long been difficult to evaluate. The objective of this study was to describe the long-term incidence of aggressive bony changes developing in dogs with long bone diaphyseal fractures stabilized by metallic bone plates compared to a breed-, sex-, and age-matched control group. The medical records of a tertiary referral center were retrospectively reviewed for dogs that matched each respective criterion...
2017: Frontiers in Veterinary Science
https://www.readbyqxmd.com/read/28186653/progression-of-cutaneous-plasmacytoma-to-plasma-cell-leukemia-in-a-dog
#17
Emily D Rout, Alba Maria M Shank, Angharad H K Waite, Andrea Siegel, Anne C Avery, Paul R Avery
A 5-year-old male neutered Bernese Mountain Dog was presented for cutaneous plasmacytoma, which was treated by surgical excision. Four months later, the dog developed multiple skin masses, hyphema, pericardial and mild bicavitary effusions, myocardial masses, and marked plasmacytosis in the peripheral blood. Circulating plasma cells expressed CD34 and MHC class II by flow cytometry. Immunocytochemistry demonstrated that these cells were strongly positive for multiple myeloma oncogene 1/interferon regulatory factor 4 (MUM-1) and weakly to moderately positive for Pax5...
February 10, 2017: Veterinary Clinical Pathology
https://www.readbyqxmd.com/read/28184101/individual-and-group-level-trajectories-of-behavioural-development-in-border-collies
#18
Stefanie Riemer, Corsin Müller, Zsófia Virányi, Ludwig Huber, Friederike Range
In order to assess dogs' personality changes during ontogeny, a cohort of 69 Border collies was followed up from six to 18-24 months. When the dogs were 6, 12, and 18-24 months old, their owners repeatedly filled in a dog personality questionnaire (DPQ), which yielded five personality factors divided into fifteen facets. All five DPQ factors were highly correlated between the three age classes, indicating that the dogs' personality remained consistent relative to other individuals. Nonetheless, at the group level significant changes with age were found for four of the five DPQ factors...
July 2016: Applied Animal Behaviour Science
https://www.readbyqxmd.com/read/28171732/endolymphatic-sac-tumor-in-two-dogs
#19
K J Barnes, V Clear, K Youmans, M R Hardcastle, N Nelson, A Petersen, M Kiupel
Endolymphatic sac tumors (ELSTs) are rare neoplasms of the inner and middle ear described in humans. Diagnosis of such neoplasms is difficult and largely dependent on a combination of histologic, immunohistochemical, and clinical findings. Although the neoplastic cells lack cellular features of malignancy, these are clinically aggressive tumors that often invade the surrounding temporal bone. Here, we describe 2 dogs with middle ear masses that share morphologic, immunohistochemical, and clinical similarities with human ELSTs...
January 1, 2017: Veterinary Pathology
https://www.readbyqxmd.com/read/28160303/soft-tissue-sarcoma-in-the-dog-part-2-surgical-margins-controversies-and-a-comparative-review
#20
REVIEW
J P Bray
Soft tissue sarcoma constitutes a heterogeneous group of mesenchymal tumours. Although they are common in the dog, many uncertainties surround the best options for clinical management. Despite recent improvements in outcome, approximately one in five patients may still die as a result of their disease. There is some evidence that wide surgical excision may not be required for every soft tissue sarcoma but, conversely, complacency in treatment may adversely affect outcomes for patients with aggressive disease...
February 2017: Journal of Small Animal Practice
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