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Veterinary Research

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https://www.readbyqxmd.com/read/28532492/innate-immune-responses-induced-by-the-saponin-adjuvant-matrix-m-in-specific-pathogen-free-pigs
#1
Viktor Ahlberg, Bernt Hjertner, Per Wallgren, Stina Hellman, Karin Lövgren Bengtsson, Caroline Fossum
Saponin-based adjuvants have been widely used to enhance humoral and cellular immune responses in many species, but their mode of action is not fully understood. A characterization of the porcine transcriptional response to Matrix-M was performed in vitro using lymphocytes, monocytes or monocyte-derived dendritic cells (MoDCs) and in vivo. The effect of Matrix-M was also evaluated in specific pathogen free (SPF) pigs exposed to conventionally reared pigs. The pro-inflammatory cytokine genes IL1B and CXCL8 were up-regulated in monocytes and lymphocytes after Matrix-M exposure...
May 22, 2017: Veterinary Research
https://www.readbyqxmd.com/read/28499403/surface-displaying-of-swine-igg1-fc-enhances-baculovirus-vectored-vaccine-efficacy-by-facilitating-viral-complement-escape-and-mammalian-cell-transduction
#2
Zehui Liu, Yangkun Liu, Yuanyuan Zhang, Yajuan Yang, Jingjing Ren, Xiaoying Zhang, Enqi Du
Baculovirus-mediated gene transfer has been developed as a vaccine design strategy against a number of diseases without apparent viral replication. However, it has been hampered by complement-dependent inactivation, thus hindering the in vivo application of baculovirus. A variety of approaches have been exploited to bypass the complement system in the serum. In this study, we constructed and screened a series of baculovirus vectors displaying complement interfering factors, of which a baculovirus vector displaying swine IgG1 Fc (pFc) showed the highest complement antagonism (75...
May 12, 2017: Veterinary Research
https://www.readbyqxmd.com/read/28472979/concurrent-infection-with-porcine-reproductive-and-respiratory-syndrome-virus-and-haemophilus-parasuis-in-two-types-of-porcine-macrophages-apoptosis-production-of-ros-and-formation-of-multinucleated-giant-cells
#3
Lenka Kavanová, Katarína Matiašková, Lenka Levá, Hana Štěpánová, Kateřina Nedbalcová, Ján Matiašovic, Martin Faldyna, Jiří Salát
Porcine reproductive and respiratory syndrome (PRRS) is one of the most significant and economically important infectious diseases affecting swine worldwide and can predispose pigs to secondary bacterial infections caused by, e.g. Haemophilus parasuis. The aim of the presented study was to compare susceptibility of two different types of macrophages which could be in contact with both pathogens during infection with PRRS virus (PRRSV) and in co-infection with H. parasuis. Alveolar macrophages (PAMs) as resident cells provide one of the first lines of defence against microbes invading lung tissue...
May 4, 2017: Veterinary Research
https://www.readbyqxmd.com/read/28454560/fecal-shedding-and-tissue-infections-demonstrate-transmission-of-mycobacterium-avium-subsp-paratuberculosis-in-group-housed-dairy-calves
#4
Caroline S Corbett, Jeroen De Buck, Karin Orsel, Herman W Barkema
Current Johne's disease control programs primarily focus on decreasing transmission of Mycobacterium avium subsp. paratuberculosis (MAP) from infectious adult cows to susceptible calves. However, potential transmission between calves is largely overlooked. The objective was to determine the extent of MAP infection in calves contact-exposed to infectious penmates. Thirty-two newborn Holstein-Friesian calves were grouped into 7 experimental groups of 4, consisting of 2 inoculated (IN) calves, and 2 contact-exposed (CE) calves, and 1 control pen with 4 non-exposed calves...
April 28, 2017: Veterinary Research
https://www.readbyqxmd.com/read/28424083/erratum-to-the-impact-of-co-infections-on-fish-a-review
#5
Mohamed H Kotob, Simon Menanteau-Ledouble, Gokhlesh Kumar, Mahmoud Abdelzaher, Mansour El-Matbouli
No abstract text is available yet for this article.
April 19, 2017: Veterinary Research
https://www.readbyqxmd.com/read/28412972/mammary-microbiota-of-dairy-ruminants-fact-or-fiction
#6
Pascal Rainard
Explorations of how the complex microbial communities that inhabit different body sites might contribute to health and disease have prompted research on the ways the harmonious relationship between a host and its microbiota could be used to keep animals healthy in their production conditions. In particular, there is a growing interest in the bacterial signatures that can be found in the milk of healthy or mastitic dairy cows. The concept of sterility of the healthy mammary gland of dairy ruminants has been challenged by the results of studies using bacterial DNA-based methodology...
April 17, 2017: Veterinary Research
https://www.readbyqxmd.com/read/28403902/phylodynamics-of-foot-and-mouth-disease-virus-o-panasia-in-vietnam-2010-2014
#7
Barbara Brito, Steven J Pauszek, Michael Eschbaumer, Carolina Stenfeldt, Helena C de Carvalho Ferreira, Le T Vu, Nguyen T Phuong, Bui H Hoang, Nguyen D Tho, Pham V Dong, Phan Q Minh, Ngo T Long, Donald P King, Nick J Knowles, Do H Dung, Luis L Rodriguez, Jonathan Arzt
Foot-and-mouth disease virus (FMDV) is endemic in Vietnam, a country that plays an important role in livestock trade within Southeast Asia. The large populations of FMDV-susceptible species in Vietnam are important components of food production and of the national livelihood. In this study, we investigated the phylogeny of FMDV O/PanAsia in Vietnam, reconstructing the virus' ancestral host species (pig, cattle or buffalo), clinical stage (subclinical carrier or clinically affected) and geographical location...
April 13, 2017: Veterinary Research
https://www.readbyqxmd.com/read/28403908/permissiveness-of-bovine-epithelial-cells-from-lung-intestine-placenta-and-udder-for-infection-with-coxiella-burnetii
#8
Katharina Sobotta, Katharina Bonkowski, Elisabeth Liebler-Tenorio, Pierre Germon, Pascal Rainard, Nina Hambruch, Christiane Pfarrer, Ilse D Jacobsen, Christian Menge
Ruminants are the main source of human infections with the obligate intracellular bacterium Coxiella (C.) burnetii. Infected animals shed high numbers of C. burnetii by milk, feces, and birth products. In goats, shedding by the latter route coincides with C. burnetii replication in epithelial (trophoblast) cells of the placenta, which led us to hypothesize that epithelial cells are generally implicated in replication and shedding of C. burnetii. We therefore aimed at analyzing the interactions of C. burnetii with epithelial cells of the bovine host (1) at the entry site (lung epithelium) which govern host immune responses and (2) in epithelial cells of gut, udder and placenta decisive for the quantity of pathogen excretion...
April 12, 2017: Veterinary Research
https://www.readbyqxmd.com/read/28399941/antimicrobial-potential-of-bacteriocins-in-poultry-and-swine-production
#9
REVIEW
Amel Ben Lagha, Bruno Haas, Marcelo Gottschalk, Daniel Grenier
The routine use of antibiotics in agriculture has contributed to an increase in drug-resistant bacterial pathogens in animals that can potentially be transmitted to humans. In 2000, the World Health Organization identified resistance to antibiotics as one of the most significant global threats to public health and recommended that the use of antibiotics as additives in animal feed be phased out or terminated, particularly those used to treat human infections. Research is currently being carried out to identify alternative antimicrobial compounds for use in animal production...
April 11, 2017: Veterinary Research
https://www.readbyqxmd.com/read/28399906/target-organs-for-lymphocystis-disease-virus-replication-in-gilthead-seabream-sparus-aurata
#10
Estefania J Valverde, Juan J Borrego, M Carmen Sarasquete, Juan B Ortiz-Delgado, Dolores Castro
The lymphocystis disease (LCD), the main viral pathology described in cultured gilthead seabream (Sparus aurata), is a self-limiting condition characterized by the appearance of hypertrophied fibroblasts (named lymphocysts) in the connective tissue of fish, primarily in the skin and fins. The causative agent of the disease is the Lymphocystis disease virus (LCDV), a member of the Iridoviridae family. In the present study, LCDV genome and transcripts were detected by real-time PCR in caudal fin, as well as in several internal organs, such as intestine, liver, spleen, kidney and brain, from asymptomatic, diseased and recovered gilthead seabream juveniles...
April 11, 2017: Veterinary Research
https://www.readbyqxmd.com/read/28388924/enhancing-the-toolbox-to-study-il-17a-in-cattle-and-sheep
#11
Sean R Wattegedera, Yolanda Corripio-Miyar, Yvonne Pang, David Frew, Tom N McNeilly, Javier Palarea-Albaladejo, Colin J McInnes, Jayne C Hope, Elizabeth J Glass, Gary Entrican
The development of methods to detect cytokine expression by T cell subsets in ruminants is fundamental to strategic development of new livestock vaccines for prevention of infectious diseases. It has been possible to detect T cell expression of IFN-γ, IL-4 and IL-10 in ruminants for many years but methods to detect expression of IL-17A are relatively limited. To address this gap in capability we have cloned bovine and ovine IL-17A cDNAs and expressed biologically-active recombinant proteins in Chinese Hamster Ovary (CHO) cells...
April 8, 2017: Veterinary Research
https://www.readbyqxmd.com/read/28381295/cytokine-response-to-the-rsv-antigen-delivered-by-dendritic-cell-directed-vaccination-in-congenic-chicken-lines
#12
Jitka Mucksová, Jiří Plachý, Ondřej Staněk, Jiří Hejnar, Jiří Kalina, Barbora Benešová, Pavel Trefil
Systems of antigen delivery into antigen-presenting cells represent an important novel strategy in chicken vaccine development. In this study, we verified the ability of Rous sarcoma virus (RSV) antigens fused with streptavidin to be targeted by specific biotinylated monoclonal antibody (anti-CD205) into dendritic cells and induce virus-specific protective immunity. The method was tested in four congenic lines of chickens that are either resistant or susceptible to the progressive growth of RSV-induced tumors...
April 5, 2017: Veterinary Research
https://www.readbyqxmd.com/read/28381233/structural-integrity-and-viability-of-fredericella-sultana-statoblasts-infected-with-tetracapsuloides-bryosalmonae-myxozoa-under-diverse-treatment-conditions
#13
Ahmed Abd-Elfattah, Mansour El-Matbouli, Gokhlesh Kumar
Fredericella sultana is an invertebrate host of Tetracapsuloides bryosalmonae, the causative agent of proliferative kidney disease in salmonids. The bryozoan produces seed-like statoblasts to facilitate its persistence during unfavourable conditions. Statoblasts from infected bryozoans can harbor T. bryosalmonae and give rise to infected bryozoan colonies when conditions improve. We aimed in the present study to evaluate the integrity and viability of T. bryosalmonae-infected statoblasts after a range of harsh treatment conditions...
April 5, 2017: Veterinary Research
https://www.readbyqxmd.com/read/28376905/characterization-of-brucella-abortus-mutant-strain-%C3%AE-22915-a-potential-vaccine-candidate
#14
Yanqing Bao, Mingxing Tian, Peng Li, Jiameng Liu, Chan Ding, Shengqing Yu
Brucellosis, caused by Brucella spp., is an important zoonosis worldwide. Vaccination is an effective strategy for protection against Brucella infection in livestock in developing countries and in wildlife in developed countries. However, current vaccine strains including S19 and RB51 are pathogenic to humans and pregnant animals, limiting their use. In this study, we constructed the Brucella abortus (B. abortus) S2308 mutant strain Δ22915, in which the putative lytic transglycosylase gene BAB_RS22915 was deleted...
April 4, 2017: Veterinary Research
https://www.readbyqxmd.com/read/28327178/glyceraldehyde-3-phosphate-dehydrogenase-acts-as-an-adhesin-in-erysipelothrix-rhusiopathiae-adhesion-to-porcine-endothelial-cells-and-as-a-receptor-in-recruitment-of-host-fibronectin-and-plasminogen
#15
Weifeng Zhu, Qiang Zhang, Jingtao Li, Yanmin Wei, Chengzhi Cai, Liang Liu, Zhongmin Xu, Meilin Jin
Erysipelothrix rhusiopathiae is the causative agent of animal erysipelas and human erysipeloid. Previous studies suggested glyceraldehyde 3-phosphate dehydrogenase (GAPDH) plays a role in the pathogenesis of E. rhusiopathiae infection. We studied E. rhusiopathiae GAPDH interactions with pig vascular endothelial cells, fibronectin, and plasminogen. Recombinant GAPDH (rGAPDH) was successfully obtained, and it was shown that it plays a role in E. rhusiopathiae adhesion to pig vascular endothelial cells. Moreover, rGAPDH could bind fibronectin and plasminogen in a dose-dependent manner...
March 21, 2017: Veterinary Research
https://www.readbyqxmd.com/read/28241868/dynamic-changes-in-bronchoalveolar-macrophages-and-cytokines-during-infection-of-pigs-with-a-highly-or-low-pathogenic-genotype-1-prrsv-strain
#16
Patricia Renson, Nicolas Rose, Mireille Le Dimna, Sophie Mahé, André Keranflec'h, Frédéric Paboeuf, Catherine Belloc, Marie-Frédérique Le Potier, Olivier Bourry
Porcine reproductive and respiratory syndrome virus (PRRSV) replicates primarily in pulmonary alveolar macrophages (PAMs) and the resulting lung damage is influenced by strain virulence. To better understand the pathogenesis of PRRSV infection, we performed a longitudinal study of the PAM population and lung cytokines in specific pathogen-free pigs infected either with the highly pathogenic Lena strain or with the low pathogenic Finistere strain in comparison to uninfected pigs. Bronchoalveolar lavage fluid (BALF) and blood were collected to follow viral, cellular and cytokine changes in lung with respect to clinical signs and systemic events...
February 27, 2017: Veterinary Research
https://www.readbyqxmd.com/read/28241864/ccl2-and-ccl5-driven-attraction-of-cd172a-monocytic-cells-during-an-equine-herpesvirus-type-1-ehv-1-infection-in-equine-nasal-mucosa-and-the-impact-of-two-migration-inhibitors-rosiglitazone-rsg-and-quinacrine-qc
#17
Jing Zhao, Katrien C K Poelaert, Jolien Van Cleemput, Hans J Nauwynck
Equine herpesvirus type 1 (EHV-1) causes respiratory disease, abortion and neurological disorders in horses. Besides epithelial cells, CD172a(+) monocytic cells become infected with EHV-1 in the respiratory mucosa and transport the virus from the apical side of the epithelium to the lamina propria en route to the lymph and blood circulation. Whether CD172a(+) monocytic cells are specifically recruited to the infection sites in order to pick up virus is unknown. In our study, equine nasal mucosa explants were inoculated with EHV-1 neurological strains 03P37 and 95P105 or the non-neurological strains 97P70 and 94P247 and the migration of monocytic cells was examined by immunofluorescence...
February 27, 2017: Veterinary Research
https://www.readbyqxmd.com/read/28222802/counts-of-bovine-monocyte-subsets-prior-to-calving-are-predictive-for-postpartum-occurrence-of-mastitis-and-metritis
#18
Brianna Pomeroy, Anja Sipka, Jamal Hussen, Melanie Eger, Ynte Schukken, Hans-Joachim Schuberth
The heightened susceptibility to infectious diseases in postpartum dairy cows is often attributed to immune dysfunction associated with the transition period. However, the cell populations involved in this immune dysfunction and the dynamics between those populations are not well defined. Monocytes play a crucial role in governing initial immune response in bacterial infections. Bovine monocytes are subdivided in classical (CD14(+)/CD16(-)), intermediate (CD14(+)/CD16(+)) and non-classical monocytes (CD14(-)/CD16(+)) with distinct phenotypic and functional differences...
February 21, 2017: Veterinary Research
https://www.readbyqxmd.com/read/28222784/experimental-infections-of-different-carp-strains-with-the-carp-edema-virus-cev-give-insights-into-the-infection-biology-of-the-virus-and-indicate-possible-solutions-to-problems-caused-by-koi-sleepy-disease-ksd-in-carp-aquaculture
#19
Mikolaj Adamek, Anna Oschilewski, Peter Wohlsein, Verena Jung-Schroers, Felix Teitge, Andy Dawson, David Gela, Veronika Piackova, Martin Kocour, Jerzy Adamek, Sven M Bergmann, Dieter Steinhagen
Outbreaks of koi sleepy disease (KSD) caused by carp edema virus (CEV) may seriously affect populations of farmed common carp, one of the most important fish species for global food production. The present study shows further evidence for the involvement of CEV in outbreaks of KSD among carp and koi populations: in a series of infection experiments, CEV from two different genogroups could be transmitted to several strains of naïve common carp via cohabitation with fish infected with CEV. In recipient fish, clinical signs of KSD were induced...
February 21, 2017: Veterinary Research
https://www.readbyqxmd.com/read/28222780/advanced-biosensors-for-detection-of-pathogens-related-to-livestock-and-poultry
#20
REVIEW
Jasmina Vidic, Marisa Manzano, Chung-Ming Chang, Nicole Jaffrezic-Renault
Infectious animal diseases caused by pathogenic microorganisms such as bacteria and viruses threaten the health and well-being of wildlife, livestock, and human populations, limit productivity and increase significantly economic losses to each sector. The pathogen detection is an important step for the diagnostics, successful treatment of animal infection diseases and control management in farms and field conditions. Current techniques employed to diagnose pathogens in livestock and poultry include classical plate-based methods and conventional biochemical methods as enzyme-linked immunosorbent assays (ELISA)...
February 21, 2017: Veterinary Research
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