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Preventive Veterinary Medicine

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https://www.readbyqxmd.com/read/28903881/factors-affecting-the-cost-effectiveness-of-on-farm-culture-prior-to-the-treatment-of-clinical-mastitis-in-dairy-cows
#1
P M Down, A J Bradley, J E Breen, M J Green
The objective of this study was to use probabilistic sensitivity analysis to evaluate the cost-effectiveness of using an on-farm culture (OFC) approach to the treatment of clinical mastitis in dairy cows and compare this to a 'standard' treatment approach. A specific aim was to identify the herd circumstances under which an OFC approach would be most likely to be cost-effective. A stochastic Monte Carlo model was developed to simulate 5000 cases of clinical mastitis at the cow level and to calculate the associated costs simultaneously when treated according to 2 different treatment protocols; i) a 'conventional' approach (3 tubes of intramammary antibiotic) and ii) an OFC programme, whereby cows are treated according to the results of OFC...
September 15, 2017: Preventive Veterinary Medicine
https://www.readbyqxmd.com/read/28903880/sampling-pig-farms-at-the-abattoir-in-a-cross-sectional-study-evaluation-of-a-sampling-method
#2
Anna Camilla Birkegård, Tariq Halasa, Nils Toft
A cross-sectional study design is relatively inexpensive, fast and easy to conduct when compared to other study designs. Careful planning is essential to obtaining a representative sample of the population, and the recommended approach is to use simple random sampling from an exhaustive list of units in the target population. This approach is rarely feasible in practice, and other sampling procedures must often be adopted. For example, when slaughter pigs are the target population, sampling the pigs on the slaughter line may be an alternative to on-site sampling at a list of farms...
September 15, 2017: Preventive Veterinary Medicine
https://www.readbyqxmd.com/read/28903879/salmonella-enterica-subsp-diarizonae-serotype-61-k-1-5-7-associated-with-chronic-proliferative-rhinitis-and-high-nasal-colonization-rates-in-a-flock-of-texel-sheep-in-switzerland
#3
Nadine Stokar-Regenscheit, Gudrun Overesch, Regula Giezendanner, Simone Roos, Corinne Gurtner
Salmonella (S.) enterica subspecies diarizonae (IIIb) serovar 61:(k):1,5,(7) (S. IIIb 61:(k):1,5,(7)) is considered to be host adapted to sheep and is found regularly in feces of healthy carriers and of sheep with salmonellosis. A few cases of chronic proliferative rhinitis (CPR) in sheep have been described as a new disease in association with S. IIIb 61:k:1,5,(7) in the USA, in Spain and now for the first time in Switzerland. Three animals of a flock of Texel sheep suffering from chronic nasal discharge and dyspnea with subsequent death were necropsied...
September 15, 2017: Preventive Veterinary Medicine
https://www.readbyqxmd.com/read/28903878/thermal-inactivation-of-avian-influenza-virus-in-poultry-litter-as-a-method-to-decontaminate-poultry-houses
#4
Christopher B Stephens, Erica Spackman
Removal of contaminated material from a poultry house during recovery from an avian influenza virus (AIV) outbreak is costly and labor intensive. Because AIV is not environmentally stable, heating poultry houses may provide an alternative disinfection method. The objective was to determine the time necessary to inactivate AIV in poultry litter at temperatures achievable in a poultry house. Low pathogenic (LP) AIV inactivation was evaluated between 10.0°-48.9°C, at ∼5.5°C intervals and highly pathogenic (HP) AIV inactivation was evaluated between 10...
September 15, 2017: Preventive Veterinary Medicine
https://www.readbyqxmd.com/read/28903877/exploring-the-role-of-small-scale-livestock-keepers-for-national-biosecurity-the-pig-case
#5
Carla Correia-Gomes, Madeleine K Henry, Harriet K Auty, George J Gunn
Small-scale keepers are less likely to engage with production organisations and may therefore be less aware of legislation, rules and biosecurity practices which are implemented in the livestock sector. Their role in the transmission of endemic and exotic diseases is not well studied, but is believed to be important. The authors use small-scale pig keepers in Scotland as an example of how important small-scale livestock keepers might be for national biosecurity. In Scotland more than two thirds of pig producers report that they keep less than 10 pigs, meaning that biosecurity practices and pig health status on a substantial number of holdings are largely unknown; it is considered important to fill this knowledge gap...
September 15, 2017: Preventive Veterinary Medicine
https://www.readbyqxmd.com/read/28903876/persistence-of-mycoplasma-hyopneumoniae-sequence-types-in-spite-of-a-control-program-for-enzootic-pneumonia-in-pigs
#6
Gudrun Overesch, Peter Kuhnert
Enzootic pneumonia (EP) in pigs caused by Mycoplasma (M.) hyopneumoniae has successfully been combatted in Switzerland. A control program was fully implemented in 2004 which is based on total depopulation strategies of affected fattening farms as well as partial depopulation on breeding farms. Thereby, the number of cases has dropped drastically from more than 200 in 2003 to two cases in 2013. Currently monitoring is done based on clinical observation and subsequent diagnostic of coughing pigs. Moreover, in case of more than 10% gross pathological lesions per slaughter batch laboratory confirmation for EP is compulsory...
September 15, 2017: Preventive Veterinary Medicine
https://www.readbyqxmd.com/read/28903875/risk-assessment-of-the-entry-of-canine-rabies-into-papua-new-guinea-via-sea-and-land-routes
#7
Victoria J Brookes, Andy Keponge-Yombo, David Thomson, Michael P Ward
Canine-rabies is endemic in parts of Indonesia and continues to spread eastwards through the Indonesian archipelago. Papua New Guinea (PNG) has a land border with Papua Province, Indonesia, as well as logging and fishing industry connections throughout Asia. PNG has a Human Development Index of 0.505; therefore, an incursion of canine-rabies could have devastating impacts on human (7.5 million) and animal populations. Given the known difficulties of rabies elimination in resource-scarce environments, an incursion of rabies into PNG would also likely compromise the campaign for global elimination of rabies...
September 15, 2017: Preventive Veterinary Medicine
https://www.readbyqxmd.com/read/28903874/mortality-in-danish-swine-herds-spatio-temporal-clusters-and-risk-factors
#8
Ana Carolina Lopes Antunes, Annette Kjær Ersbøll, Kristine Bihrmann, Nils Toft
The aim of this study was to explore spatio-temporal mortality patterns in Danish swine herds from December 2013 to October 2015, and to discuss the use of mortality data for syndromic surveillance in Denmark. Although it has previously been assessed within the context of syndromic surveillance, the value of mortality data generated on a regular and mandatory basis from all swine herds remains unexplored in terms of swine surveillance in Denmark. A total of 5010 farms were included in the analysis, corresponding to 1896 weaner herds, 1490 sow herds and 3839 finisher herds...
September 15, 2017: Preventive Veterinary Medicine
https://www.readbyqxmd.com/read/28903873/validation-of-a-model-for-ranking-aquaculture-facilities-for-risk-based-disease-surveillance
#9
Nicolas Diserens, Laura Cristina Falzon, Beat von Siebenthal, Gertraud Schüpbach-Regula, Thomas Wahli
A semi-quantitative model for risk ranking of aquaculture facilities in Switzerland with regard to the introduction and spread of Viral Haemorrhagic Septicaemia (VHS) and Infectious Haematopoietic Necrosis (IHN) was developed in a previous study (Diserens et al., 2013). The objective of the present study was to validate this model using data collected during field visits on aquaculture sites in four Swiss cantons compared to data collected through a questionnaire in the previous study. A discrepancy between the values obtained with the two different methods was found in 32...
September 15, 2017: Preventive Veterinary Medicine
https://www.readbyqxmd.com/read/28903872/prevalence-of-subclinical-mastitis-and-associated-risk-factors-at-cow-and-herd-level-in-dairy-farms-in-north-west-ethiopia
#10
S A Mekonnen, G Koop, S T Melkie, C D Getahun, H Hogeveen, T J G M Lam
Knowledge of mastitis pathogens and their predominance as well as understanding of risk factors are prerequisites to improve udder health in a herd, region or country. In Ethiopia, such information is scarce, despite the fact that mastitis is an important cattle disease in the country. A cross-sectional study that describes prevalence and causative agents of subclinical mastitis (SCM) as well as risk factors at cow and herd level was conducted on 167 dairy farms in North-West Ethiopia. On average, 33% of the quarters and 62% of the cows were California Mastitis Test (CMT) positive, but the within herd quarter level prevalence ranged between 0 and 100%...
September 15, 2017: Preventive Veterinary Medicine
https://www.readbyqxmd.com/read/28903871/prevalence-and-risk-factors-for-transition-period-diseases-in-grazing-dairy-cows-in-brazil
#11
Rolnei R Daros, Maria J Hötzel, Jose A Bran, Stephen J LeBlanc, Marina A G von Keyserlingk
The aim of this cross-sectional study was to describe the incidence risk of dystocia, retained placenta (RP), pathological recumbence (down cow), the prevalence of metritis and subclinical ketosis (SCK), and the risk factors for SCK, metritis, and RP in grazing dairy herds in Southern Brazil. Fifty-three herds were visited 2-6 times from February to October of 2015. Body condition score (BCS), breed, days in milk (DIM), parity and disease status were recorded for each cow that was between 3 and 21 DIM at the time of the visits...
September 15, 2017: Preventive Veterinary Medicine
https://www.readbyqxmd.com/read/28903870/spatial-distribution-of-bovine-cysticercosis-a-retrospective-study-in-brazil-from-2010-through-2015
#12
Gabriel Augusto Marques Rossi, Isabella Vilhena Freire Martins, Rafael Ferraço de Campos, Luiz Filippe Simão Soares, Henrique Meiroz de Souza Almeida, Luis Antonio Mathias
Geographical Information Systems (GIS) is frequently used in the control of animal diseases. In Brazil, the most impacting economical loss in the beef supply chain is bovine cysticercosis. This study focused on assessing the prevalence and geospatial distribution of bovine cysticercosis in 19 Brazilian states. To this, we gathered data from 146,346,244 bovines slaughtered between the years of 2010 and 2015. The observed prevalence was 0.62% (C.I. 0.62-0.63). In total, 30.86% cysticerci were viable, while 69...
September 15, 2017: Preventive Veterinary Medicine
https://www.readbyqxmd.com/read/28903869/interventions-to-reduce-non-typhoidal-salmonella-in-pigs-during-transport-to-slaughter-and-lairage-systematic-review-meta-analysis-and-research-synthesis-based-infection-models-in-support-of-assessment-of-effectiveness
#13
REVIEW
Barbara J Wilhelm, Ian Young, Sarah Cahill, Patricia Desmarchelier, Rei Nakagawa, Andrijana Rajić
A systematic review of the effectiveness of interventions to reduce Salmonella prevalence or concentration in pork was undertaken. A broad search was conducted in two electronic databases. Each citation was appraised using screening tools designed and tested a priori. Level 1 relevance screening excluded irrelevant citations; level 2 confirmed relevance and categorized. Data were then extracted, and intervention categories were descriptively summarized. Meta-analysis was performed to provide a summary estimate of treatment effect where two or more studies investigated the same intervention in comparable populations...
September 15, 2017: Preventive Veterinary Medicine
https://www.readbyqxmd.com/read/28903868/predicting-farm-level-animal-populations-using-environmental-and-socioeconomic-variables
#14
Mary van Andel, Christopher Jewell, Joanna McKenzie, Tracey Hollings, Andrew Robinson, Mark Burgman, Paul Bingham, Tim Carpenter
Accurate information on the geographic distribution of domestic animal populations helps biosecurity authorities to efficiently prepare for and rapidly eradicate exotic diseases, such as Foot and Mouth Disease (FMD). Developing and maintaining sufficiently high-quality data resources is expensive and time consuming. Statistical modelling of population density and distribution has only begun to be applied to farm animal populations, although it is commonly used in wildlife ecology. We developed zero-inflated Poisson regression models in a Bayesian framework using environmental and socioeconomic variables to predict the counts of livestock units (LSUs) and of cattle on spatially referenced farm polygons in a commercially available New Zealand farm database, Agribase...
September 15, 2017: Preventive Veterinary Medicine
https://www.readbyqxmd.com/read/28903867/detection-accuracy-of-renibacterium-salmoninarum-in-chinook-salmon-oncorhynchus-tshawytscha-walbaum-from-non-lethally-collected-samples-effects-of-exposure-route-and-disease-severity
#15
Carolyn A Richards, Cheryl A Murphy, Travis O Brenden, Thomas P Loch, Mohamed Faisal
Bacterial kidney disease (BKD), caused by Renibacterium salmoninarum, threatens salmonid populations throughout the Northern hemisphere. Many fishery regulatory authorities require ongoing disease monitoring in hatcheries and spawning runs prior to gamete collection to prevent BKD outbreaks and spread. According to diagnostic protocols of the American Fisheries Society-Fish Health Section, monitoring for R. salmoninarum generally consists of lethal sampling of visceral organs from fish. However, non-lethal sampling would be preferable, especially for valuable broodstock or endangered species...
September 15, 2017: Preventive Veterinary Medicine
https://www.readbyqxmd.com/read/28903866/a-bayesian-latent-class-model-to-estimate-the-accuracy-of-pregnancy-diagnosis-by-transrectal-ultrasonography-and-laboratory-detection-of-pregnancy-associated-glycoproteins-in-dairy-cows
#16
G T Fosgate, B Motimele, A Ganswindt, P C Irons
Accurate diagnosis of pregnancy is an essential component of an effective reproductive management plan for dairy cattle. Indirect methods of pregnancy detection can be performed soon after breeding and offer an advantage over traditional direct methods in not requiring an experienced veterinarian and having potential for automation. The objective of this study was to estimate the sensitivity and specificity of pregnancy-associated glycoprotein (PAG) detection ELISA and transrectal ultrasound (TRUS) in dairy cows of South Africa using a Bayesian latent class approach...
September 15, 2017: Preventive Veterinary Medicine
https://www.readbyqxmd.com/read/28903865/economic-evaluation-of-the-eradication-program-for-bovine-viral-diarrhea-in-the-swiss-dairy-sector
#17
B Thomann, A Tschopp, I Magouras, M Meylan, G Schüpbach-Regula, B Häsler
Since 2008, the Swiss veterinary service has been running a mandatory eradication program for Bovine Viral Diarrhea (BVD) that is focused on detecting and eliminating persistently infected (PI) animals. Detection was initially based on antigen testing from ear tag samples of the entire cattle population, followed by antigen testing of all newborn calves until 2012. Since then, bulk milk serology (dairy herds) and blood sample serology (beef herds) have been used for the surveillance of disease-free herds. From 2008 to 2012, the proportion of newborn PI calves decreased from 1...
September 15, 2017: Preventive Veterinary Medicine
https://www.readbyqxmd.com/read/28716209/understanding-animal-health-communication-networks-among-smallholder-livestock-producers-in-australia-using-stakeholder-analysis
#18
L Hayes, R Woodgate, L Rast, J-A L M L Toribio, M Hernández-Jover
Smallholder livestock producers are a diverse population with wide ranging motivations for keeping livestock. The biosecurity risk posed by smallholders has been the subject of much conjecture, with comparisons often made between the level of animal health and biosecurity knowledge of smallholders, versus that of commercial livestock producers. This research aimed to gain a better understanding of current knowledge of smallholder production in Australia, particularly in relation to biosecurity and emergency animal disease, and to investigate the relationships that exist between smallholders and the organisations and individuals from which they seek information, assistance and support...
September 1, 2017: Preventive Veterinary Medicine
https://www.readbyqxmd.com/read/28716208/spatial-dynamics-of-porcine-epidemic-diarrhea-ped-spread-in-the-southern-kyushu-japan
#19
Yosuke Sasaki, Haruya Toyomaki, Satoshi Sekiguchi, Masuo Sueyoshi, Kohei Makita, Satoshi Otake, Andres Perez, Julio Alvarez
Porcine epidemic diarrhea (PED) was detected for the first time in seven years in Japan in October 2013 in Okinawa Prefecture. By December 2013, PED had spread into Miyazaki and Kagoshima Prefectures in the southern part of Kyushu, one of the regions with the highest farm density in the country. The objective of the study here was to assess the spatial dynamics of PED spread during the 8 months of the epidemic in the southern part of Kyushu between December 2013, the month observed first case in the studied region, and July 2014...
September 1, 2017: Preventive Veterinary Medicine
https://www.readbyqxmd.com/read/28716207/influence-of-true-within-herd-prevalence-of-small-ruminant-lentivirus-infection-in-goats-on-agreement-between-serological-immunoenzymatic-tests
#20
Michał Czopowicz, Olga Szaluś-Jordanow, Marcin Mickiewicz, Agata Moroz, Lucjan Witkowski, Iwona Markowska-Daniel, Emilia Bagnicka, Jarosław Kaba
The study was conducted to evaluate influence of the true within-herd prevalence of small ruminant lentivirus (SRLV) infection on agreement beyond chance between three different types of commercial serological ELISAs. Blood samples were collected from 865 goats from 12 dairy goat herds. Serum samples were tested using three commercial ELISA kits: whole-virus indirect ELISA (wELISA), indirect ELISA based on recombined TM and CA antigens (TM/CA-ELISA), and competitive-inhibition ELISA based on SU antigen (SU-ELISA)...
September 1, 2017: Preventive Veterinary Medicine
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