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Bovine Tuberculosis

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https://www.readbyqxmd.com/read/27926825/mycobacterium-malmesburyense-sp-nov-a-novel-non-tuberculous-mycobacterium-species-revealed-by-multiple-gene-sequence-characterization
#1
Nomakorinte Gcebe, Victor Rutten, Nicolaas Gey van Pittius, Brendon Naicker, Anita Michel
Non-tuberculous mycobacteria (NTM) are ubiquitous in the environment and an increasing number of NTM species have been isolated and characterized from both humans and animals, highlighting the zoonotic potential of these bacteria. Host exposure to NTM may impact on cross-reactive immune responsiveness which may affect diagnosis of bovine tuberculosis and may also play a role in the variability of the efficacy of Mycobacterium bovis BCG vaccination against tuberculosis. In this study we characterized 10 NTM isolates originating from water, soil, nasal swabs of cattle and African buffalo as well as bovine tissue samples...
December 5, 2016: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/27893809/model-of-selective-and-non-selective-management-of-badgers-meles-meles-to-control-bovine-tuberculosis-in-badgers-and-cattle
#2
Graham C Smith, Richard J Delahay, Robbie A McDonald, Richard Budgey
Bovine tuberculosis (bTB) causes substantial economic losses to cattle farmers and taxpayers in the British Isles. Disease management in cattle is complicated by the role of the European badger (Meles meles) as a host of the infection. Proactive, non-selective culling of badgers can reduce the incidence of disease in cattle but may also have negative effects in the area surrounding culls that have been associated with social perturbation of badger populations. The selective removal of infected badgers would, in principle, reduce the number culled, but the effects of selective culling on social perturbation and disease outcomes are unclear...
2016: PloS One
https://www.readbyqxmd.com/read/27893793/field-trial-of-an-aerially-distributed-tuberculosis-vaccine-in-a-low-density-wildlife-population-of-brushtail-possums-trichosurus-vulpecula
#3
Graham Nugent, Ivor J Yockney, E Jackie Whitford, Martin L Cross, Frank E Aldwell, Bryce M Buddle
Oral-delivery Mycobacterium bovis bacillus Calmette-Guérin (BCG) vaccine in a lipid matrix has been shown to confer protection against M. bovis infection and reduce the severity of tuberculosis (TB) when fed to brushtail possums (Trichosurus vulpecula), the major wildlife vector of bovine TB in New Zealand. Here we demonstrate the feasibility of aerial delivery of this live vaccine in bait form to an M. bovis-infected wild possum population, and subsequently assess vaccine uptake and field efficacy. Pre-trial studies indicated a resident possum population at very low density (<0...
2016: PloS One
https://www.readbyqxmd.com/read/27884111/quantitative-genetic-analysis-of-the-btb-diagnostic-single-intradermal-comparative-cervical-test-sicct
#4
Smaragda Tsairidou, Susan Brotherstone, Mike Coffey, Stephen C Bishop, John A Woolliams
BACKGROUND: Bovine tuberculosis (bTB) is a disease of significant economic importance and is a persistent animal health problem with implications for public health worldwide. Control of bTB in the UK has relied on diagnosis through the single intradermal comparative cervical test (SICCT). However, limitations in the sensitivity of this test hinder successful eradication and the control of bTB remains a major challenge. Genetic selection for cattle that are more resistant to bTB infection can assist in bTB control...
November 24, 2016: Genetics, Selection, Evolution: GSE
https://www.readbyqxmd.com/read/27863555/test-performance-of-three-serological-assays-for-the-detection-of-mycobacterium-bovis-infection-in-common-warthogs-phacochoerus-africanus
#5
Eduard O Roos, Peter Buss, Lin-Mari de Klerk-Lorist, Jennie Hewlett, Guy A Hausler, Leana Rossouw, Alicia J McCall, David Cooper, Paul D van Helden, Sven D C Parsons, Michele A Miller
Sporadic cases of bovine tuberculosis (bTB) have been reported in warthogs in Southern Africa and confirmed through mycobacterial culture. However, there are no validated ante-mortem tests currently available for bTB in warthogs. In this study, we evaluated the use of three serological assays for the detection of Mycobacterium bovis infection in warthogs; an indirect enzyme-linked immunosorbent assay (ELISA) using bovine purified protein derivative (PPDb) as a capture antigen (indirect PPD ELISA), as well as two commercial assays, the TB ELISA-VK(®) and DPP(®) VetTB Assay...
December 2016: Veterinary Immunology and Immunopathology
https://www.readbyqxmd.com/read/27836043/management-of-on-farm-risk-to-livestock-from-bovine-tuberculosis-in-michigan-usa-white-tailed-deer-predictions-from-a-spatially-explicit-stochastic-model
#6
David S L Ramsey, Daniel J O'Brien, Rick W Smith, Melinda K Cosgrove, Stephen M Schmitt, Brent A Rudolph
The eradication of bovine tuberculosis (bTB), caused by Mycobacterium bovis, from cattle in many locations worldwide is complicated by endemic foci of the disease in free-ranging wildlife. Recent simulation modeling of the bTB outbreak in white-tailed deer (WTD) in Michigan, USA, suggests current management is unlikely to eradicate bTB from the core outbreak area (DMU 452) within the next three decades. However, some level of control short of eradication might sufficiently reduce transmission from deer to cattle to a point at which the negative effects of bTB on the cattle industry could be reduced or eliminated, while minimizing the negative consequences of reducing deer numbers...
November 1, 2016: Preventive Veterinary Medicine
https://www.readbyqxmd.com/read/27836036/assessing-the-sensitivity-of-bovine-tuberculosis-surveillance-in-canada-s-cattle-population-2009-2013
#7
Farouk El Allaki, Noel Harrington, Krista Howden
The objectives of this study were (1) to estimate the annual sensitivity of Canada's bTB surveillance system and its three system components (slaughter surveillance, export testing and disease investigation) using a scenario tree modelling approach, and (2) to identify key model parameters that influence the estimates of the surveillance system sensitivity (SSSe). To achieve these objectives, we designed stochastic scenario tree models for three surveillance system components included in the analysis. Demographic data, slaughter data, export testing data, and disease investigation data from 2009 to 2013 were extracted for input into the scenario trees...
November 1, 2016: Preventive Veterinary Medicine
https://www.readbyqxmd.com/read/27834714/draft-genome-sequence-of-mycobacterium-bovis-strain-d-10-02315-isolated-from-wild-boar
#8
Maxime Branger, Amandine Hauer, Lorraine Michelet, Claudine Karoui, Thierry Cochard, Krystel De Cruz, Sylvie Henault, María Laura Boschiroli, Franck Biet
Mycobacterium bovis is the etiologic agent of bovine tuberculosis, a chronic infectious disease, affecting livestock, wild animals, and sometimes humans. We report the draft genome sequence of a Mycobacterium bovis strain isolated from wild boar of spoligotype SB0120 (or BCG-like) also present in wildlife-livestock multi-host systems.
November 10, 2016: Genome Announcements
https://www.readbyqxmd.com/read/27833091/divergent-macrophage-responses-to-mycobacterium-bovis-among-naturally-exposed-uninfected-and-infected-cattle
#9
Omar A Alcaráz-López, Cindy García-Gil, Claudia Morales-Martínez, Gonzalo López-Rincón, Ciro Estrada-Chávez, José A Gutiérrez-Pabello, Hugo Esquivel-Solís
Mycobacterium bovis, the causative agent of bovine tuberculosis (BTB), is a successful pathogen that remains an important global threat to livestock. Cattle naturally exposed to M. bovis normally become reactive to the M. bovis-purified protein derivative (PPD; tuberculin) skin test; however, some individuals remain negative, suggesting they may be resistant to infection. To better understand host innate resistance to infection, 26 cattle from herds with a long history of high tuberculosis prevalence were included in this study...
November 11, 2016: Immunology and Cell Biology
https://www.readbyqxmd.com/read/27825312/human-tuberculosis-caused-by-mycobacterium-bovis-a-retrospective-comparison-with-mycobacterium-tuberculosis-in-a-mexican-tertiary-care-centre-2000-2015
#10
Pedro Torres-Gonzalez, Miguel E Cervera-Hernandez, Areli Martinez-Gamboa, Lourdes Garcia-Garcia, Luis P Cruz-Hervert, Miriam Bobadilla-Del Valle, Alfredo Ponce-de Leon, Jose Sifuentes-Osornio
BACKGROUND: Human tuberculosis caused by Mycobacterium bovis is believed to be frequent in developing countries. Transmission is usually through ingestion of unpasteurized dairy products, although airborne contagion is possible. Disease caused by M. tuberculosis or M. bovis is clinically indistinguishable from each other. The aim of this study was to determine the factors associated with M. bovis disease. METHODS: Retrospective analysis of all culture-positive cases of M...
November 8, 2016: BMC Infectious Diseases
https://www.readbyqxmd.com/read/27818094/comparative-study-of-mycobacterium-bovis-primary-isolation-methods
#11
Marina de Azevedo Issa, Paulo Martins Soares Filho, Antônio Augusto Fonseca Júnior, Mikael Arrais Hodon, Lílian Cristian Dos Santos, Jenner Karlisson Pimenta Dos Reis, Rômulo Cerqueira Leite
For the definitive diagnosis of bovine tuberculosis, isolation of the etiologic agent is required. However, there is no consensus on the best methodology for isolation of Mycobacterium bovis in Brazil. This study evaluated the most used decontaminants and culture media in the country, in order to identify the best combination for the Brazilian samples. Three decontaminants - 2% sodium hydroxide (w/v), 0.75% hexadecylpiridinium chloride (w/v) and 5% sulphuric acid (v/v) and four culture media - 7H11 Middlebrook with additives and OADC supplement "A" (7H11 A), the same media with another supplement trademark (7H11 B), tuberculosis blood agar (B83) and Stonebrink's medium were compared...
September 30, 2016: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
https://www.readbyqxmd.com/read/27816477/molecular-epidemiology-of-brucella-abortus-isolated-from-cattle-in-brazil-2009-2013
#12
Mayra Silva Oliveira, Elaine Maria Seles Dorneles, Paulo Martins Filho Soares, Antônio Augusto Fonseca, Lívia Orzil, Patrícia Gomes de Souza, Andrey Pereira Lage
The aims of the present study were to genotype Brucella abortus strains isolated from cattle in Brazil between 2009 and 2013, and to analyze their distribution to support the Programa Nacional de Controle e Erradicação de Brucelose e Tuberculose (PNCEBT) (National Brucellosis and Tuberculosis Control and Eradication Program). One hundred forty B. abortus strains isolated from cattle in Brazil between 2009 and 2013 were genotyped using a set of 18 variable number of tandem repeats (VNTR) (MLVA16+HOOF-Print 3 and 4)...
November 2, 2016: Acta Tropica
https://www.readbyqxmd.com/read/27809648/isolation-of-mycobacterium-bovis-from-free-ranging-wildlife-in-south-korea
#13
Yunho Jang, Soyoon Ryoo, Hyunkyoung Lee, Narae Kim, Hang Lee, So-Young Park, Woong-Seog Song, Jong-Taek Kim, Hee Soo Lee, Jae Myung Kim
We demonstrate Mycobacterium bovis infection in wild boar ( Sus scrofa ) in South Korea. During 2012-15, we attempted to isolate M. bovis from 847 wild animals, mainly Korean water deer ( Hydropotes inermis argyropus), raccoon dogs ( Nyctereutes procyonoides ), and wild boar, from 11 regions in South Korea. We isolated M. bovis from three of 118 wild boar (2.5%) captured in Gyeonggi Province, where bovine tuberculosis (bTB) outbreaks have also occurred in livestock. Spoligotypes and mycobacterial interspersed repetitive units-variable number tandem repeats types of these M...
November 3, 2016: Journal of Wildlife Diseases
https://www.readbyqxmd.com/read/27809647/limited-antibody-evidence-of-exposure-to-mycobacterium-bovis-in-feral-swine-sus-scrofa-in-the-usa
#14
Kerri Pedersen, Ryan S Miller, Theodore D Anderson, Kristy L Pabilonia, Jonathan R Lewis, Rebecca L Mihalco, Christian Gortazar, Thomas Gidlewski
Bovine tuberculosis is a chronic disease of cattle ( Bos taurus ) caused by the bacterium Mycobacterium bovis . Efforts have been made in the US to eradicate the disease in cattle, but spillover into wildlife and subsequent spillback have impeded progress in some states. In particular, infection in white-tailed deer ( Odocoileus virginianus ) has been followed by infection in cattle in some Midwestern states. Infection has also been documented in feral swine ( Sus scrofa ) on the Hawaiian island of Molokai and in various European countries, but no large-scale survey of antibody exposure to the bacteria has been conducted in feral swine in the US...
November 3, 2016: Journal of Wildlife Diseases
https://www.readbyqxmd.com/read/27799930/increased-tnf-%C3%AE-ifn-%C3%AE-il-2-and-decreased-tnf-%C3%AE-ifn-%C3%AE-production-by-central-memory-t-cells-are-associated-with-protective-responses-against-bovine-tuberculosis-following-bcg-vaccination
#15
Mayara F Maggioli, Mitchell V Palmer, Tyler C Thacker, Hans Martin Vordermeier, Jodi L McGill, Adam O Whelan, Michelle H Larsen, William R Jacobs, W Ray Waters
Central memory T cell (Tcm) and polyfunctional CD4 T cell responses contribute to vaccine-elicited protection with both human and bovine tuberculosis (TB); however, their combined role in protective immunity to TB is unclear. To address this question, we evaluated polyfunctional cytokine responses by CD4 T cell effector/memory populations from bacille Calmette-Guerin (BCG) vaccinated and non-vaccinated calves by flow cytometry prior to and after aerosol challenge with virulent Mycobacterium bovis. Polyfunctional cytokine expression patterns in the response by Tcm, effector memory, and effector T cell subsets were similar between BCG-vaccinated and M...
2016: Frontiers in Immunology
https://www.readbyqxmd.com/read/27788055/diagnosis-and-implications-of-mycobacterium-bovis-infection-in-banded-mongooses-mungos-mungo-in-the-kruger-national-park-south-africa
#16
Angela C Brüns, Manfred Tanner, Mark C Williams, Louise Botha, Amanda O'Brien, Geoffrey T Fosgate, Paul D Van Helden, John Clarke, Anita L Michel
Bovine tuberculosis (bTB) was first diagnosed in the Kruger National Park (KNP) in 1990. Research has since focused on the maintenance host, the African buffalo ( Syncerus caffer ) and clinically affected lion ( Panthera leo ). However, little is known about the role of small predators in tuberculosis epidemiology. During 2011-12, we screened banded mongooses ( Mungos mungo ) in the bTB high-prevalence zone of the KNP for Mycobacterium tuberculosis complex members. Fecal swabs, tracheal swabs, and tracheal lavages of 76 banded mongooses caught in cage traps within a 2-km radius of Skukuza Rest Camp were submitted for Mycobacterium culture, isolation, and species identification...
October 27, 2016: Journal of Wildlife Diseases
https://www.readbyqxmd.com/read/27771068/molecular-and-epidemiological-population-based-integrative-analysis-of-human-and-animal-mycobacterium-bovis-infections-in-a-low-prevalence-setting
#17
Juan José Palacios, Yurena Navarro, Beatriz Romero, Ana Penedo, Ángela Menéndez González, M Dolores Pérez Hernández, Ana Fernández-Verdugo, Francisca Copano, Aurora Torreblanca, Emilio Bouza, Lucas Domínguez, Lucía de Juan, Darío García-de-Viedma
Human Mycobacterium bovis infections are considered to be due to reactivations, when involve elderly people, or to recent transmissions, when exposure is occupational. We determined the cause of M. bovis infections by genotyping M. bovis isolates in a population-based study integrating human and animal databases. Among the 1,586 tuberculosis (TB) cases in Asturias, Northern Spain (1,080,000 inhabitants), 1,567 corresponded to M. tuberculosis and 19 to M. bovis. The number of human isolates sharing genotype with cattle isolates was higher than expected (47%) for a setting with low prevalence of bovine TB and efficient control programs in cattle...
November 15, 2016: Veterinary Microbiology
https://www.readbyqxmd.com/read/27756866/how-well-do-farmers-know-their-badgers-relating-farmer-knowledge-to-ecological-survey-data
#18
A Robertson, R J Delahay, G J Wilson, I J Vernon, R A McDonald, J Judge
Knowledge of badger distribution is important for the management of bovine tuberculosis. At the farm level, typically the only information on badger activity available is from the farmers themselves. This study compares how well farmer perceptions of badger activity match data obtained from ecological surveys. Farmer estimates of numbers of badger setts (burrows) surrounding their farms were generally correlated with field survey results, but tended to be underestimates. Farmers correctly recorded 50 per cent of setts recorded in surveys, with larger setts and active setts more likely to be correctly recorded...
October 18, 2016: Veterinary Record
https://www.readbyqxmd.com/read/27749934/localised-badger-culling-increases-risk-of-herd-breakdown-on-nearby-not-focal-land
#19
Jon Bielby, Flavie Vial, Rosie Woodroffe, Christl A Donnelly
Bovine tuberculosis is an important disease affecting the UK livestock industry. Controlling bovine tuberculosis (TB) is made more complex by the presence of a wildlife host, the Eurasian badger, Meles meles. Repeated large-scale badger culls implemented in the Randomised Badger Culling Trial (RBCT) were associated with decreased cattle risks inside the culling area, but also with increased cattle risks up to the 2km outside the culling area. Intermediate reductions in badger density, as achieved by localised reactive culling in the RBCT, significantly increased cattle TB...
2016: PloS One
https://www.readbyqxmd.com/read/27726786/experimental-infection-models-of-tuberculosis-in-domestic-livestock
#20
Bryce M Buddle, H Martin Vordermeier, R Glyn Hewinson
In this article we present experimental Mycobacterium bovis infection models in domestic livestock species and how these models were applied to vaccine development, biomarker discovery, and the definition of specific antigens for the differential diagnosis of infected and vaccinated animals. In particular, we highlight synergies between human and bovine tuberculosis (TB) research approaches and data and propose that the application of bovine TB models could make a valuable contribution to human TB vaccine research and that close alignment of both research programs in a one health philosophy will lead to mutual and substantial benefits...
August 2016: Microbiology Spectrum
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