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Brucella abortus

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https://www.readbyqxmd.com/read/28183751/genome-sequences-of-human-and-livestock-isolates-of-brucella-melitensis-and-brucella-abortus-from-the-country-of-georgia
#1
Ketevan Sidamonidze, Jun Hang, Yu Yang, George Dzavashvili, Ekaterine Zhgenti, Nino Trapaidze, Paata Imnadze, Mikeljon P Nikolich
Brucellosis, which is among the most widespread global zoonotic diseases, is endemic in the nation of Georgia and causes substantial human morbidity and economic loss. Here, we report whole-genome sequences of three Brucella melitensis and seven Brucella abortus isolates from cattle, sheep, and humans that represent genetic groups discovered in Georgia.
February 9, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28167945/tlr7-and-tlr3-sense-brucella-abortus-rna-to-induce-proinflammatory-cytokine-production-but-they-are-dispensable-for-host-control-of-infection
#2
Priscila C Campos, Marco Túlio R Gomes, Erika S Guimarães, Gabriela Guimarães, Sergio C Oliveira
Brucella abortus is a Gram-negative, facultative intracellular bacterium that causes brucellosis, a worldwide zoonotic disease leading to undulant fever in humans and abortion in cattle. The immune response against this bacterium relies on the recognition of microbial pathogen-associated molecular patterns, such as lipoproteins, lipopolysaccharides, and DNA; however, the immunostimulatory potential of B. abortus RNA remains to be elucidated. Here, we show that dendritic cells (DCs) produce significant amounts of IL-12, IL-6, and IP-10/CXCL10, when stimulated with purified B...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28160160/the-unexpected-discovery-of-brucella-abortus-buck-19-vaccine-in-goats-from-ecuador-underlines-the-importance-of-biosecurity-measures
#3
Jorge Ron-Román, Dirk Berkvens, Daniela Barzallo-Rivadeneira, Alexandra Angulo-Cruz, Pablo González-Andrade, Elizabeth Minda-Aluisa, Washington Benítez-Ortíz, Jef Brandt, Richar Rodríguez-Hidalgo, Claude Saegerman
Very few, mostly old, and only preliminary serological studies of brucellosis in goats exist in Ecuador. In order to assess the current epidemiological situation, we performed a cross-sectional serological study in the goat populations of Carchi (n = 160 animals), Pichincha (n = 224 animals), and Loja provinces (n = 2024 animals). Only two positive serological results (RB negative and SAT-EDTA ≥400 IU/ml) were obtained in lactating goats from the same farm in Quito (Pichincha province). Additionally, milk was sampled from 220 animals in Pichincha province...
February 3, 2017: Tropical Animal Health and Production
https://www.readbyqxmd.com/read/28152976/origins-and-global-context-of-brucella-abortus-in-italy
#4
Giuliano Garofolo, Elisabetta Di Giannatale, Ilenia Platone, Katiuscia Zilli, Lorena Sacchini, Anna Abass, Massimo Ancora, Cesare Cammà, Guido Di Donato, Fabrizio De Massis, Paolo Calistri, Kevin P Drees, Jeffrey T Foster
BACKGROUND: Brucellosis is a common and chronic disease of cattle and other bovids that often causes reproductive disorders. Natural infection in cattle is caused by Brucella abortus and transmission typically occurs during abortions, calving, or nursing. Brucellosis is also a major zoonotic disease due to contamination of dairy products or contact with the tissues of infected animals. Brucellosis has been eradicated from most of the developed world in the last 40 years but persists in many regions-the disease remains prevalent in portions of Africa, the Middle East, Asia, and Central and South America, as well as in the Mediterranean basin...
February 2, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/28131952/brucella-abortus-2308%C3%AE-nodv%C3%AE-nodw-double-mutant-is-highly-attenuated-and-confers-protection-against-wild-type-challenge-in-balb-c-mice
#5
Zhiqiang Li, Shuli Wang, Jinliang Zhang, Guangli Yang, Baodong Yuan, Jie Huang, Jincheng Han, Li Xi, Yanren Xiao, Chuangfu Chen, Hui Zhang
Brucellosis is an important zoonotic disease of worldwide distribution, which causes animal and human disease. However, the current Brucella abortus (B. abortus) vaccines (S19 and RB51) have several drawbacks, including residual virulence for animals and humans. Moreover, S19 cannot allow serological differentiation between infected and vaccinated animals. We constructed double deletion (ΔNodVΔNodW) mutant from virulent B. abortus 2308 (S2308) by deleting the genes encoding two-component regulatory system (TCS) in chromosome II in S2308...
January 25, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28129787/seroprevalence-and-risk-factors-associated-with-bovine-brucellosis-in-the-potohar-plateau-pakistan
#6
Shahzad Ali, Shamim Akhter, Heinrich Neubauer, Falk Melzer, Iahtasham Khan, Emmanuel Nji Abatih, Hosny El-Adawy, Muhammad Irfan, Ali Muhammad, Muhammad Waqas Akbar, Sajid Umar, Qurban Ali, Muhammad Naeem Iqbal, Abid Mahmood, Haroon Ahmed
BACKGROUND: The seroprevalence and risk factors of bovine brucellosis were studied at animal and herd level using a combination of culture, serological and molecular methods. The study was conducted in 253 randomly selected cattle herds of the Potohar plateau, Pakistan from which a total of 2709 serum (1462 cattle and 1247 buffaloes) and 2330 milk (1168 cattle and 1162 buffaloes) samples were collected. Data on risk factors associated with seroprevalence of brucellosis were collected through interviews using questionnaires...
January 28, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28126739/structure-based-mutational-studies-of-o-acetylserine-sulfhydrylase-reveal-the-reason-for-the-loss-of-cysteine-synthase-complex-formation-in-brucella-abortus
#7
Sudhaker Dharavath, Isha Raj, Samudrala Gourinath
Cysteine biosynthesis takes place via a two-step pathway in bacteria, fungi, plants and protozoan parasites, but not in humans, and hence the machinery of cysteine biosynthesis is an opportune target for therapeutics. The decameric cysteine synthase complex (CSC) is formed when the C-terminal tail of serine acetyl transferase (SAT) binds in the active site of O-acetyl serine sulfydrylase (OASS), playing a role in the regulation of this pathway. Here we show that OASS from Brucella abortus (BaOASS) does not interact with its cognate SAT C-terminal tail...
January 26, 2017: Biochemical Journal
https://www.readbyqxmd.com/read/28118557/brucellosis-transmission-between-wildlife-and-livestock-in-the-greater-yellowstone-ecosystem-inferences-from-dna-genotyping
#8
Michael P O'Brien, Albano Beja-Pereira, Neil Anderson, Ruben M Ceballos, William H Edwards, Beth Harris, Rick L Wallen, Vânia Costa
The wildlife of the Greater Yellowstone Ecosystem carries brucellosis, which was first introduced to the area by cattle in the 19th Century. Brucellosis transmission between wildlife and livestock has been difficult to study due to challenges in culturing the causative agent, Brucella abortus . We examined B. abortus transmission between American bison ( Bison bison ), Rocky Mountain elk ( Cervus elaphus nelsoni), and cattle ( Bos taurus ) using variable number tandem repeat (VNTR) markers on DNA from 98 B...
January 24, 2017: Journal of Wildlife Diseases
https://www.readbyqxmd.com/read/28096613/immunotoxic-effect-of-thiamethoxam-in-immunized-mice-with-brucella-abortus-cultural-filtrate-antigen
#9
L H Salema, M J Alwan, Afaf Abdulrahman Yousif
AIM: This study was planned for determination the toxic effect of thiamethoxam (TMX) in immunized mice with Brucella abortus culture filtrate antigen (CFBAgs) (as a vaccine) and its role of TMX on decrease activity of B. abortus antigen on eliciting of humoral and cellular immunity. MATERIALS AND METHODS: To achieve these goals 60 female mice were used, 7-8 weeks age, they were divided equally into three groups (20 in each group) and treated as follows: 1(st) group: Mice were immunized with CFBAgs intraperitoneally in two doses, 2 weeks intervals with (protein concentration 2 mg\ml), 2(nd) group: Mice immunized as in the 1(st) group and was administrated orally with 1/10 lethal dose 50% of TMX (83...
December 2016: Veterinary World
https://www.readbyqxmd.com/read/28088479/three-dimensional-structure-of-full-length-ntrx-an-unusual-member-of-the-ntrc-family-of-response-regulators
#10
Ignacio Fernández, Irina Cornaciu, Mariela Del Carmen Carrica, Emiko Uchikawa, Guillaume Hoffmann, Rodrigo Sieira, José Antonio Márquez, Fernando A Goldbaum
Bacteria sense and adapt to environmental changes using two-component systems. These signaling pathways are formed by a histidine kinase that phosphorylates a response regulator (RR), which finally modulates the transcription of target genes. The bacterium Brucella abortus codes for a two-component system formed by the histidine kinase NtrY and the RR NtrX that participates in sensing low oxygen tension and generating an adaptive response. NtrX is a modular protein with REC, AAA+, and DNA-binding domains, an architecture that classifies it among the NtrC subfamily of RRs...
January 12, 2017: Journal of Molecular Biology
https://www.readbyqxmd.com/read/28077743/seroepidemiology-of-human-brucellosis-among-blood-donors-in-southern-ethiopia-calling-attention-to-a-neglected-zoonotic-disease
#11
Bereket Workalemahu, Tsegaye Sewunet, Ayalew Astatkie
Human brucellosis is neglected in southern Ethiopia. Although traditional food processing practices and animal husbandry which increase the risk of brucellosis are common, it has not been properly studied yet. This study was conducted to determine the seroepidemiology of brucellosis among apparently healthy individuals in southern Ethiopia. In the study, blood samples were collected to screen for serum agglutinins reactive to stained antigen of Brucella abortus Standard tube titration was performed for reactive serum to determine the titer of the agglutinin...
January 11, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28068003/brucella-abortus-is-prevalent-in-both-humans-and-animals-in-bangladesh
#12
A K M A Rahman, C Saegerman, D Berkvens, F Melzer, H Neubauer, D Fretin, E Abatih, N Dhand, M P Ward
To determine the role of different Brucella (B.) spp. in Bangladesh, 62 animal samples and 500 human sera were tested. Animal samples from cattle, goats and sheep (including milk, bull semen, vaginal swabs and placentas) were cultured for Brucella spp. Three test-positive human sera and all animal samples were screened by Brucella genus-specific real-time PCR (RT-PCR), and positive samples were then tested by IS711 RT-PCR to detect B. abortus and B. melitensis DNA. Only B. abortus DNA was amplified from 13 human and six animal samples...
January 9, 2017: Zoonoses and Public Health
https://www.readbyqxmd.com/read/28018318/cox-2-inhibition-reduces-brucella-bacterial-burden-in-draining-lymph-nodes
#13
Aurélie Gagnaire, Laurent Gorvel, Alexia Papadopoulos, Kristine Von Bargen, Jean-Louis Mège, Jean-Pierre Gorvel
Brucella is a Gram-negative facultative intracellular bacterium responsible for a chronic disease known as brucellosis, the most widespread re-emerging zoonosis worldwide. Establishment of a Th1-mediated immune response characterized by the production of IL-12 and IFNγ is essential to control the disease. Leukotrienes derived from arachidonic acid (AA) metabolism are known to negatively regulate a protective Th1 immune response against bacterial infections. Here, using genomics approaches we demonstrate that Brucella abortus strongly stimulates the prostaglandin (PG) pathway in dendritic cells (DC)...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28017899/nocodazole-treatment-interrupted-brucella-abortus-invasion-in-raw-264-7-cells-and-successfully-attenuated-splenic-proliferation-with-enhanced-inflammatory-response-in-mice
#14
Alisha Wehdnesday Bernardo Reyes, Huynh Tan Hop, Lauren Togonon Arayan, Tran Xuan Ngoc Huy, Wongi Min, Hu Jang Lee, Hong Hee Chang, Suk Kim
Brucellosis is one of the most important and widespread zoonosis worldwide responsible for serious economic losses and considerable public health burden. In this study, we investigated the modulatory effect of a microtubule-inhibitor, nocodazole, on B. abortus infection in murine macrophages and in a mouse model. Nocodazole activated macrophages and directly inhibited the growth of Brucella in a dose-dependent manner. Nocodazole increased adhesion but reduced invasion and intracellular growth of Brucella in macrophages although it did not affect co-localization of Brucella with LAMP-1...
December 23, 2016: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28012988/the-host-immune-enhancing-agent-korean-red-ginseng-oil-successfully-attenuates-brucella-abortus-infection-in-a-murine-model
#15
Alisha Wehdnesday Bernardo Reyes, Huynh Tan Hop, Lauren Togonon Arayan, Tran Xuan Ngoc Huy, Soo Jong Park, Kwang Dong Kim, WonGi Min, Hu Jang Lee, Man Hee Rhee, Yi-Seong Kwak, Suk Kim
ETHNOPHARMACOLOGICAL RELEVANCE: Panax ginseng Meyer (Araliaceae), is one of the most valuable traditional Chinese medicines and is used for the treatment of various human diseases. In this study, we elucidated the protective mechanism of the essential oil from Korean red ginseng (RGO) against Brucella infection. MATERIALS AND METHODS: The effects of RGO on Brucella abortus viability, NO production, uptake and intracellular growth in macrophages were investigated...
December 21, 2016: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/27994212/intracellular-trafficking-modulation-by-ginsenoside-rg3-inhibits-brucella-abortus-uptake-and-intracellular-survival-within-raw-264-7-cells
#16
Tran Xuan Ngoc Huy, Alisha Wehdnesday Bernardo Reyes, Huynh Tan Hop, Lauren Togonon Arayan, WonGi Min, Hu Jang Lee, Man Hee Rhee, Hong Hee Chang, Suk Kim
Ginsenoside Rg3, a saponin extracted from Ginseng, has various pharmacological and biological activities, however its effects against Brucella infection are still unclear. Herein, the inhibitory effects of ginsenoside Rg3 against intracellular parasitic Brucella infection were evaluated through bacterial infection, adherence assays, and LAMP-1 colocalization, as well as immunoblotting and FACS for detecting MAPKs signaling proteins and F-actin polymerization, respectively. The internalization, intracellular growth and adherence of Brucella (B...
December 20, 2016: Journal of Microbiology and Biotechnology
https://www.readbyqxmd.com/read/27994018/a-conserved-abc-transport-system-regulated-by-the-general-stress-response-pathways-of-alpha-and-gammaproteobacteria
#17
Julien Herrou, Jonathan W Willett, Daniel M Czyż, Gyorgy Babnigg, Youngchang Kim, Sean Crosson
: Brucella abortus σ(E1) is an EcfG-family sigma factor that regulates transcription of dozens of genes in response to diverse stress conditions, and is required for maintenance of chronic infection in a mouse model. A putative ATP-binding cassette transporter operon, bab1_0223-bab1_0226, is among the most highly activated gene sets in the σ(E1) regulon. The proteins encoded by this operon resemble quaternary ammonium compatible solute importers, but are most similar in sequence to the broadly conserved YehZYXW system, which remains largely uncharacterized...
December 19, 2016: Journal of Bacteriology
https://www.readbyqxmd.com/read/27955740/control-of-animal-brucellosis-the-malaysian-experience
#18
REVIEW
M Zamri-Saad, M I Kamarudin
Brucellosis is a zoonotic disease characterized by reproductive failure in animals and undulent fever in humans. In cattle, it is caused by Brucella abortus while in goats by Brucella melitensis, the main cause of brucellosis in humans. Brucellosis in livestock has been associated with importation of animals from breeder herd of unknown disease status. The prevalence of bovine brucellosis Brucella abortus in 2014 ranged between 1% and 2% in Thailand and Indonesia, and 4%-5% in Malaysia and Myanmar. Prevalence of goat brucellosis Brucella melitensis is approximately 1% in Malaysia and Thailand...
December 2016: Asian Pacific Journal of Tropical Medicine
https://www.readbyqxmd.com/read/27938682/comparison-of-potential-protection-conferred-by-three-immunization-strategies-protein-protein-dna-dna-and-dna-protein-against-brucella-infection-using-omp2b-in-balb-c-mice
#19
Maryam Golshani, Sima Rafati, Mehdi Nejati-Moheimani, Melina Ghasemian, Saeid Bouzari
In the present study, immunogenicity and protective efficacy of the Brucella outer membrane protein 2b (Omp2b) was evaluated in BALB/c mice using Protein/Protein, DNA/DNA and DNA/Protein vaccine strategies. Immunization of mice with three vaccine regimens elicited a strong specific IgG response (higher IgG2a titers over IgG1 titers) and provided Th1-oriented immune response. Vaccination of BALB/c mice with the DNA/Pro regimen induced higher levels of IFN-γ/IL-2 and conferred more protection levels against B...
December 25, 2016: Veterinary Microbiology
https://www.readbyqxmd.com/read/27938677/first-evaluation-of-an-influenza-viral-vector-based-brucella-abortus-vaccine-in-sheep-and-goats-assessment-of-safety-immunogenicity-and-protective-efficacy-against-brucella-melitensis-infection
#20
Kaissar Tabynov, Bolat Yespembetov, Nurali Matikhan, Sholpan Ryskeldinova, Nadezhda Zinina, Zhailaubay Kydyrbayev, Nurika Assanzhanova, Kairat Tabynov, Gourapura J Renukaradhya, Gulnara Mukhitdinova, Abylai Sansyzbay
Previously we developed and evaluated a candidate influenza viral vector based Brucella abortus vaccine (Flu-BA) administered with a potent adjuvant Montanide Gel01 in cattle, which was found safe and highly effective. This study was aimed to establish a proof-of-concept of the efficacy of Flu-BA vaccine formulation in sheep and goats. We vaccinated sheep and goats with Flu-BA vaccine and as a positive control vaccinated a group of animals with a commercial B. melitensis Rev.1 vaccine. Clinically, both Flu-BA and Rev...
December 25, 2016: Veterinary Microbiology
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