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https://www.readbyqxmd.com/read/28331087/feline-immunodeficiency-virus-evolutionarily-acquires-two-proteins-vif-and-protease-capable-of-antagonizing-feline-apobec3
#1
Rokusuke Yoshikawa, Junko S Takeuchi, Eri Yamada, Yusuke Nakano, Naoko Misawa, Yuichi Kimura, Fengrong Ren, Takayuki Miyazawa, Yoshio Koyanagi, Kei Sato
The interplay between viral and host proteins has been well studied to elucidate virus-host interactions and their relevance to virulence. Mammalian genes encode apolipoprotein B mRNA-editing enzyme catalytic polypeptide-like 3 (APOBEC3) proteins, which act as intrinsic restriction factors against lentiviruses. To overcome APOBEC3-mediated anti-viral actions, lentiviruses have evolutionarily acquired an accessory protein, viral infectivity factor (Vif), and Vif degrades host APOBEC3 proteins via a ubiquitin/proteasome-dependent pathway...
March 22, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28285597/prevalence-study-and-risk-factor-analysis-of-selected-bacterial-protozoal-and-viral-including-vector-borne-pathogens-in-cats-from-cyprus
#2
Charalampos Attipa, Kostas Papasouliotis, Laia Solano-Gallego, Gad Baneth, Yaarit Nachum-Biala, Elpida Sarvani, Toby G Knowles, Sena Mengi, David Morris, Chris Helps, Séverine Tasker
BACKGROUND: Feline infectious agent studies are lacking in Cyprus. The aims of this study were to determine the prevalence and risk factors for various feline infectious agents, including feline vector-borne pathogens (FVBP), in cats from Cyprus. METHODS: A cross-sectional, descriptive, multicentre study was performed on 174 feline samples [138 owned and 36 shelter-feral, including both healthy (43) and non-healthy (131), cats] from private veterinary clinics from all six districts of Cyprus...
March 13, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28285590/molecular-detection-of-hepatozoon-spp-and-cytauxzoon-sp-in-domestic-and-stray-cats-from-madrid-spain
#3
David Díaz-Regañón, Alejandra Villaescusa, Tania Ayllón, Fernando Rodríguez-Franco, Gad Baneth, Lydia Calleja-Bueno, Mercedes García-Sancho, Beatriz Agulla, Ángel Sainz
BACKGROUND: Different species of apicomplexan protozoans of the genera Hepatozoon and Cytauxzoon can infect domestic cats, but their epidemiology and clinical relevance are not fully understood. The aim of this study was to assess the molecular prevalence of Hepatozoon spp. and Cytauxzoon spp. and to identify associated risk factors and clinical and laboratory abnormalities in a population of cats from Madrid, Spain. METHODS: Six hundred and forty-four client-owned and stray cats from Madrid, Spain, were included in this study...
March 13, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28285588/prevalence-and-molecular-characterization-of-canine-and-feline-hemotropic-mycoplasmas-hemoplasmas-in-northern-italy
#4
Silvia Ravagnan, Erika Carli, Eleonora Piseddu, Graziana Da Rold, Elena Porcellato, Claudia Zanardello, Antonio Carminato, Marta Vascellari, Gioia Capelli
BACKGROUND: Hemotropic mycoplasmas (hemoplasmas), the agents of infectious anemia, have been reported in dogs and cats. Little data are available on hemoplasma infections in Italy. The aim of this study was to evaluate the species of hemoplasmas and their prevalence in dogs and cats of northern Italy. METHODS: Blood samples were obtained from 117 candidate blood donor dogs, 278 free-roaming dogs and 227 free-roaming cats in 2014 and 2015. Samples were first screened for hemoplasmas with a SYBR green real time PCR...
March 13, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28202016/risk-factors-of-different-hemoplasma-species-infections-in-cats
#5
Michèle Bergmann, Theresa Englert, Bianca Stuetzer, Jennifer R Hawley, Michael R Lappin, Katrin Hartmann
BACKGROUND: Hemoplasma species (spp.) commonly cause infections in cats worldwide. However, data on risk factors for infections are limited. The aim of this study was to determine the prevalence of hemoplasma spp. infections in cats in Southern Germany and to assess risk factors associated with infection. RESULTS: DNA was extracted from blood samples of 479 cats presented to different veterinary hospitals for various reasons. DNA of feline hemoplasmas was amplified by use of a previously reported PCR assay...
February 16, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/28158913/performance-of-4-point-of-care-screening-tests-for-feline-leukemia-virus-and-feline-immunodeficiency-virus
#6
J K Levy, P Cynda Crawford, S J Tucker
BACKGROUND: More than 3 million cats in the United States are infected with FeLV or FIV. The cornerstone of control is identification and segregation of infected cats. HYPOTHESIS/OBJECTIVES: To compare test performance with well-characterized clinical samples of currently available FeLV antigen/FIV antibody combination test kits. ANIMALS: Surplus serum and plasma from diagnostic samples submitted by animal shelters, diagnostic laboratories, veterinary clinics, and cat research colonies...
March 2017: Journal of Veterinary Internal Medicine
https://www.readbyqxmd.com/read/28155290/the-diagnosis-of-bilateral-primary-renal-paragangliomas-in-a-cat
#7
Ryan B Friedlein, Alain J Carter, Robert D Last, Sarah Clift
A 9-year-old sterilised female domestic short-hair cat was referred with a history of vomiting and anorexia of 3 months' duration. Biochemistry, full-blood counts, thoracic radiographs, feline pancreatic-specific lipase, abdominal ultrasonography and feline immunodeficiency virus/feline leukaemia virus (FIV/FeLV) SNAP tests had been performed. Mild hypochloraemia and moderate hypokalaemia were evident on initial presentation. Abdominal ultrasonography initially revealed unilateral renal nodules on the left side...
January 24, 2017: Journal of the South African Veterinary Association
https://www.readbyqxmd.com/read/28131385/comparison-of-three-feline-leukaemia-virus-felv-point-of-care-antigen-test-kits-using-blood-and-saliva
#8
COMPARATIVE STUDY
Mark E Westman, Richard Malik, Evelyn Hall, Paul A Sheehy, Jacqueline M Norris
Feline leukaemia virus (FeLV) can be a challenging infection to diagnose due to a complex feline host-pathogen relationship and occasionally unreliable test results. This study compared the accuracy of three point-of-care (PoC) FeLV p27 antigen test kits commonly used in Australia and available commercially worldwide (SNAP FIV/FeLV Combo, Witness FeLV/FIV and Anigen Rapid FIV/FeLV), using detection of FeLV provirus by an in-house real-time polymerase chain reaction (qPCR) assay as the diagnostic gold standard...
February 2017: Comparative Immunology, Microbiology and Infectious Diseases
https://www.readbyqxmd.com/read/28130406/prevalence-of-bartonella-species-infections-in-cats-in-southern-germany
#9
M Bergmann, T Englert, B Stuetzer, J R Hawley, M R Lappin, K Hartmann
Bartonella species are zoonotic pathogens, and infections in cats are common. However, prevalence in cats in Southern Germany is still unknown. Therefore, prevalence of Bartonella species DNA in blood of 479 Southern German cats was determined using a previously published conventional PCR targeting a fragment of the 16S-23S rRNA intergenic spacer region. Associations between Bartonella bacteraemia, housing conditions, feline immunodeficiency virus (FIV) and feline leukaemia virus (FeLV) status, including progressive, regressive and abortive FeLV infection, were evaluated using Fisher's exact test...
January 27, 2017: Veterinary Record
https://www.readbyqxmd.com/read/28107367/first-molecular-characterization-of-feline-immunodeficiency-virus-in-domestic-cats-from-mainland-china
#10
Jilei Zhang, Liang Wang, Jing Li, Patrick Kelly, Stuart Price, Chengming Wang
The feline immunodeficiency virus (FIV) is a retrovirus of the Lentivirus genus that was initially isolated from a colony of domestic cats in California in 1986 and has now been recognized as a common feline pathogen worldwide. To date, there is only one recent serology-based report on FIV in mainland China which was published in 2016. We designed this study to investigate the molecular prevalence and diversity of feline immunodeficiency virus (FIV) in domestic cats from mainland China. We studied the prevalence of FIV in whole blood samples of 615 domestic cats in five cities (Beijing, Guangzhou, Nanjing, Shanghai and Yangzhou) of mainland China and examined them using FRET-PCR (Fluorescence Resonance Energy Transfer-Polymerase Chain Reaction) and regular PCRs for the gag and env genes...
2017: PloS One
https://www.readbyqxmd.com/read/28039030/sexually-transmitted-infections-and-mate-finding-allee-effects
#11
Luděk Berec, Eva Janoušková, Michal Theuer
Infectious diseases can seriously impact dynamics of their host species. In this study, we model and analyze an interaction between a sexually transmitted infection and its animal host population affected by a mate-finding Allee effect. Since mating drives both host reproduction and infection transmission, the Allee effect shapes the transmission rate of the infection which we show takes a saturating form. Our model combining sexually transmitted infections with the mate-finding Allee effect in the host produces quite rich dynamics, including oscillations, several multistability regimes, and infection-induced host extinction...
April 2017: Theoretical Population Biology
https://www.readbyqxmd.com/read/27875092/morphological-variability-of-demodex-cati-in-a-feline-immunodeficiency-virus-positive-cat
#12
Elien R L Taffin, Stijn Casaert, Edwin Claerebout, Thomas J J Vandekerkhof, Sophie Vandenabeele
CASE DESCRIPTION A 17-year-old FIV-positive cat was evaluated because of weight loss during the preceding few months. The cat had a weight loss of 0.5 kg (1.1 lb) during the last month. Because of its FIV-positive status, the cat was confined indoors. CLINICAL FINDINGS A large nonpruritic area of alopecia with hyperpigmentation and comedones was present on the right lateral aspect of the neck. The chin had diffuse alopecia and comedones. Mild alopecia was present on the dorsal aspect of the muzzle. Trichography and microscopic examination of acetate tape imprint preparations and skin scrapings revealed a very morphologically heterogeneous population of Demodex mites...
December 1, 2016: Journal of the American Veterinary Medical Association
https://www.readbyqxmd.com/read/27864462/collateral-status-and-tissue-outcome-after-intra-arterial-therapy-for-patients-with-acute-ischemic-stroke
#13
Anna Mm Boers, Ivo Gh Jansen, Olvert A Berkhemer, Albert J Yoo, Hester F Lingsma, Cornelis H Slump, Yvo Bwem Roos, Robert J van Oostenbrugge, Diederik Wj Dippel, Aad van der Lugt, Wim H van Zwam, Henk A Marquering, Charles Blm Majoie
*These authors contributed equally to this work. †A list of all MR CLEAN Investigators is given in Appendix 1 Intra-arterial therapy (IAT) for ischemic stroke aims to save brain tissue. Collaterals are thought to contribute to prolonged penumbra sustenance. In this study, we investigate the effect of collateral status on brain tissue salvage with IAT. In 500 patients randomized between IAT and standard care, collateral status was graded from 0 (absent) to 3 (good). Final infarct volumes (FIV) were calculated on post-treatment CT...
January 1, 2016: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/27862288/commercially-available-enzyme-linked-immunosorbent-assay-and-polymerase-chain-reaction-tests-for-detection-of-feline-immunodeficiency-virus-infection
#14
J Nichols, H Y Weng, A Litster, C Leutenegger, L Guptill
BACKGROUND: Feline immunodeficiency virus (FIV) infection is an important cause of disease of cats worldwide. Initial screening is commonly performed by commercially available point-of-care (POC) ELISA tests. Confirmatory testing for positive POC test results is recommended. Polymerase chain reaction (PCR) tests for FIV are commonly used additional testing methods; however, reported measures of diagnostic accuracy vary widely between PCR tests, making interpretation of results difficult...
January 2017: Journal of Veterinary Internal Medicine
https://www.readbyqxmd.com/read/27859264/inwardly-rectifying-k-channels-are-major-contributors-to-flow-induced-vasodilatation-in-resistance-arteries
#15
Sang Joon Ahn, Ibra S Fancher, Jing-Tan Bian, Chong Xu Zhang, Sarah Schwab, Robert Gaffin, Shane A Phillips, Irena Levitan
KEY POINTS: Endothelial inwardly rectifying K(+) (Kir2.1) channels regulate flow-induced vasodilatation via nitric oxide (NO) in mouse mesenteric resistance arteries. Deficiency of Kir2.1 channels results in elevated blood pressure and increased vascular resistance. Flow-induced vasodilatation in human resistance arteries is also regulated by inwardly rectifying K(+) channels. This study presents the first direct evidence that Kir channels play a critical role in physiological endothelial responses to flow...
November 17, 2016: Journal of Physiology
https://www.readbyqxmd.com/read/27836726/differences-in-env-and-gag-protein-expression-patterns-and-epitope-availability-in-feline-immunodeficiency-virus-infected-pbmc-compared-to-infected-and-transfected-feline-model-cell-lines
#16
Inge D M Roukaerts, Chris K Grant, Sebastiaan Theuns, Isaura Christiaens, Delphine D Acar, Sebastiaan Van Bockstael, Lowiese M B Desmarets, Hans J Nauwynck
Env and Gag are key components of the FIV virion that are targeted to the plasma membrane for virion assembly. They are both important stimulators and targets of anti-FIV immunity. To investigate and compare the expression pattern and antigenic changes of Gag and Env in various research models, infected PBMC (the natural FIV host cells) and GFox, and transfected CrFK were stained over time with various Env and Gag specific MAbs. In FIV infected GFox and PBMC, Env showed changes in epitope availability for antibody binding during processing and trafficking, which was not seen in transfected CrFK...
January 2, 2017: Virus Research
https://www.readbyqxmd.com/read/27825735/viral-diagnostic-criteria-for-feline-immunodeficiency-virus-and-feline-leukemia-virus-infections-in-domestic-cats-from-buenos-aires-argentina
#17
Sabrina Galdo Novo, Danilo Bucafusco, Leandro M Diaz, Ana Cristina Bratanich
A cross-sectional study was carried out on cats attending the Small Animal Hospital at the Faculty of Veterinary Sciences of the University of Buenos Aires to assess the prevalence and associated risk factors of Feline immunodeficiency virus (FIV) and Feline leukemia virus (FeLV) in the city of Buenos Aires, Argentina. Blood samples from 255 cats with symptoms compatible with FIV or FeLV infection, collected between 2009 and 2013 were analyzed by serology (immunochromatography, IA) and by hemi-nested PCR (n-PCR)...
October 2016: Revista Argentina de Microbiología
https://www.readbyqxmd.com/read/27808347/clinical-efficacy-of-melittin-in-the-treatment-of-cats-infected-with-the-feline-immunodeficiency-virus
#18
Anja D Hartmann, Natalie Wilhelm, Volker Erfle, Katrin Hartmann
OBJECTIVE: The bee venom melittin shows an antiviral efficacy against the human immunodeficiency virus in cell culture. It was shown to be non-toxic for cats. Aim of this pilot study was to investigate the clinical efficacy and side-effects of melittin in cats naturally infected with feline immunodeficiency virus (FIV). MATERIAL AND METHODS: The study was performed as a prospective, placebo-controlled double-blinded trial. Twenty cats were included, of which 10 cats each were treated with either melittin (500 µg/kg body weight) or phosphate-buffered saline (placebo) subcutaneously twice per week...
December 5, 2016: Tierärztliche Praxis. Ausgabe K, Kleintiere/Heimtiere
https://www.readbyqxmd.com/read/27770018/duration-of-antibody-response-following-vaccination-against-feline-immunodeficiency-virus
#19
Mark E Westman, Richard Malik, Evelyn Hall, Matthew Harris, Margaret J Hosie, Jacqueline M Norris
OBJECTIVES: Recently, two point-of-care (PoC) feline immunodeficiency virus (FIV) antibody test kits (Witness and Anigen Rapid) were reported as being able to differentiate FIV-vaccinated from FIV-infected cats at a single time point, irrespective of the gap between testing and last vaccination (0-7 years). The aim of the current study was to investigate systematically anti-FIV antibody production over time in response to the recommended primary FIV vaccination series. METHODS: First, residual plasma from the original study was tested using a laboratory-based ELISA to determine whether negative results with PoC testing were due to reduced as opposed to absent antibodies to gp40...
October 21, 2016: Journal of Feline Medicine and Surgery
https://www.readbyqxmd.com/read/27763827/serosurvey-for-selected-viral-pathogens-among-sympatric-species-of-the-african-large-predator-guild-in-northern-botswana
#20
Anne-Lise Chaber, Gabriele Cozzi, Femke Broekhuis, Robyn Hartley, John W McNutt
The recent increase in the creation of transboundary protected areas and wildlife corridors between them lends importance to information on pathogen prevalence and transmission among wildlife species that will become connected. One such initiative is the Kavango Zambezi Transfrontier Conservation Area of which Botswana's Okavango Delta constitutes a major contribution for wildlife and ecosystems. Between 2008 and 2011, we collected serum samples from 14 lions ( Panthera leo ), four leopards ( Panthera pardus ), 19 spotted hyenas ( Crocuta crocuta ), and six cheetahs ( Acinonyx jubatus ) in the Okavango...
January 2017: Journal of Wildlife Diseases
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