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dairy cow mastitis

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https://www.readbyqxmd.com/read/29241025/antimicrobial-usage-and-risk-of-retreatment-for-mild-to-moderate-clinical-mastitis-cases-on-dairy-farms-following-on-farm-bacterial-culture-and-selective-therapy
#1
S McDougall, J Niethammer, L E Graham
AIMS: To assess antimicrobial usage for treatment of mild to moderate clinical mastitis, and risk of retreatment, following implementation of an on-farm bacterial culture system and selective therapy based on culture results, and to assess compliance with treatment decision tree protocols and the level of agreement between results from on-farm culture and laboratory-based microbiology methods. MATERIALS AND METHODS: Herdowners from seven dairy herds were asked to collect milk samples from cases of mild to moderate clinical mastitis between July 2015 and May 2016...
December 14, 2017: New Zealand Veterinary Journal
https://www.readbyqxmd.com/read/29234314/efficacy-and-safety-of-a-bovine-associated-staphylococcus-aureus-phage-cocktail-in-a-murine-model-of-mastitis
#2
Koen Breyne, Ryan W Honaker, Zachary Hobbs, Manuela Richter, Maciej Żaczek, Taylor Spangler, Jonas Steenbrugge, Rebecca Lu, Anika Kinkhabwala, Bruno Marchon, Evelyne Meyer, Lucia Mokres
Overuse of antibiotics is a major problem in the treatment of bovine mastitis, and antibiotic treatment is frequently non-curative, thus alternative treatments are necessary. The primary aim of this study was to evaluate the efficacy of a purified phage cocktail for treatment of bovine Staphylococcus aureus mastitis in a well-defined mouse model. Candidate phages were selected based on their in vitro performance and subsequently processed into an optimally composed phage cocktail. The highest scoring phages were further tested for efficacy and resistance suppression in broth and raw milk, with and without supplemental IgG...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29233776/bovine-mastitis-an-appraisal-of-its-alternative-herbal-cure
#3
REVIEW
Saleem Mushtaq, Aabid Manzoor Shah, Aiyatullah Shah, Sajad Ahmad Lone, Aehtesham Hussain, Qazi Parvaiz Hassan, Md Niamat Ali
Bovine mastitis is globally recognised as the most common and costly disease affecting dairy herds. The disease causes huge financial losses to dairy industries by reduced yield and milk quality, deaths and culling of affected cows and also by associated treatment costs. The disease occurs due to invasion of the mammary glands by pathogenic bacteria followed by their multiplication in the milk producing tissues. The most common treatment method available against bovine mastitis is the intra-mammary infusion of antibiotics...
December 9, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29224874/prepartum-application-of-internal-teat-sealant-or-intramammary-amoxicillin-on-dairy-heifers-effect-on-udder-health-survival-and-performance
#4
V S Machado, R C Bicalho
Intramammary infusion of antimicrobials (IA) and application of an internal teat sealant (ITS) at the end of the lactation is a common strategy to prevent and treat intramammary infections during the dry period. In heifers, precalving IA has been reported to improve udder health and milk quality; however, the effect of ITS in heifers housed in freestall barns is still unknown. The objective of this study was to investigate the effect of prepartum application of ITS or IA on udder health of dairy heifers. A total of 886 heifers were randomly allocated into 1 of 4 treatment groups when they were 245 ± 3 d pregnant...
December 7, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/29223308/what-we-have-lost-mastitis-resistance-in-holstein-friesians-and-in-a-local-cattle-breed
#5
Giulio Curone, Joel Filipe, Paola Cremonesi, Erminio Trevisi, Massimo Amadori, Claudia Pollera, Bianca Castiglioni, Lauretta Turin, Vittorio Tedde, Daniele Vigo, Paolo Moroni, Andrea Minuti, Valerio Bronzo, M Filippa Addis, Federica Riva
In Holstein Friesian dairy cows, selective pressure for increased milk production has led to a higher propensity to disease, including mastitis, when compared to less selected and lower producing dairy breeds. The biology underpinning the higher resistance to disease of such "local breeds" is not fully understood. With the aim of investigating the factors associated to this phenomenon, we applied a multidisciplinary approach to compare innate immune response patterns, metabolic parameters, milk protein profiles and the milk microbiota in Holstein Friesian and Rendena cows reared in the same farm and under the same management conditions...
November 29, 2017: Research in Veterinary Science
https://www.readbyqxmd.com/read/29222843/association-of-california-mastitis-test-scores-with-intramammary-infection-status-in-lactating-dairy-cows-admitted-to-a-veterinary-teaching-hospital
#6
S A Kandeel, D E Morin, C D Calloway, P D Constable
BACKGROUND: Subclinical mastitis is of concern in veterinary hospitals because contagious mastitis pathogens might be unknowingly transmitted to susceptible cows and then back to their farm of origin. OBJECTIVES: To evaluate the California mastitis test (CMT) as an indicator of intramammary infection (IMI) in lactating dairy cows admitted to a veterinary hospital. ANIMALS: A total of 139 admissions of 128 lactating dairy cows admitted to the University of Illinois Veterinary Teaching Hospital over a 2-year period...
December 9, 2017: Journal of Veterinary Internal Medicine
https://www.readbyqxmd.com/read/29222815/evaluation-and-comparison-of-2-on-farm-tests-for-estimating-somatic-cell-count-in-quarter-milk-samples-from-lactating-dairy-cattle
#7
S A Kandeel, A A Megahed, F K Arnaout, P D Constable
BACKGROUND: The somatic cell count (SCC) is commonly used to monitor udder health and diagnose subclinical intramammary infection (IMI) in dairy cattle. HYPOTHESIS: The Somaticell test (ST) and California mastitis test (CMT) are clinically useful cow-side tests for diagnosing subclinical IMI. ANIMALS: One hundred and eleven dairy cows at dry-off and 92 cows within 4-7 days postcalving. METHODS: Quarter foremilk samples were obtained and analyzed with a DeLaval cell counter (DCC, reference method), ST, and CMT...
December 9, 2017: Journal of Veterinary Internal Medicine
https://www.readbyqxmd.com/read/29187202/gene-expression-profiling-in-pbmec-in-search-of-molecular-biomarkers-to-predict-immunoglobulin-production-in-bovine-milk
#8
M Hillreiner, C Schmautz, I Ballweg, V Korenkova, M W Pfaffl, H Kliem
BACKGROUND: Optimization of the immunoglobulin (Ig) yield in bovine milk used as therapeutic immune milk or whey for the prevention of Clostridium difficile-associated diarrhea in humans is of great importance to improve the economic efficiency of production. Individual dairy cows have diverse immune responses upon vaccination, resulting in a variable Ig yield in blood and milk. Therefore, it is advisable to pre-select cows with the best ability to produce and secrete high yields of specific Igs...
November 29, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/29178880/evaluation-of-effects-of-mycoplasma-mastitis-on-milk-composition-in-dairy-cattle-from-south-australia
#9
Abd Al-Bar Al-Farha, Farhid Hemmatzadeh, Manouchehr Khazandi, Andrew Hoare, Kiro Petrovski
BACKGROUND: Mycoplasma mastitis is increasingly posing significant impact on dairy industry. Although the effects of major conventional mastitis pathogens on milk components has been widely addressed in the literature, limited data on the effects of different Mycoplasma and Acholeplasma spp. on milk quality and quantity is available. The aim of this study was to determine the casual relationship of Mycoplasma spp. and A. laidlawii to mastitis and compare them to subclinical mastitis caused by conventional mastitis pathogens from a single dairy herd in South Australia; Mycoplasma spp...
November 25, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/29178045/considering-choline-as-methionine-precursor-lipoproteins-transporter-hepatic-promoter-and-antioxidant-agent-in-dairy-cows
#10
REVIEW
Imtiaz Hussain Raja Abbasi, Farzana Abbasi, Rab N Soomro, Mohamed E Abd El-Hack, Mervat A Abdel-Latif, Wen Li, Ren Hao, Feifei Sun, Bello M Bodinga, Khawar Hayat, Junhu Yao, Yangchun Cao
During the transition period, fatty liver syndrome may be caused in cows undergo negative energy balance, ketosis or hypocalcemia, retained placenta or mastitis problems. During the transition stage, movement of non-esterified fatty acids (NEFA) increases into blood which declines the hepatic metabolism or reproduction and consequently, lactation performance of dairy cows deteriorates. Most of studies documented that, choline is an essential nutrient which plays a key role to decrease fatty liver, NEFA proportion, improve synthesis of phosphatidylcholine, maintain lactation or physiological function and work as anti-oxidant in the transition period of dairy cows...
November 25, 2017: AMB Express
https://www.readbyqxmd.com/read/29177138/homology-modeling-and-virtual-screening-to-discover-potent-inhibitors-targeting-the-imidazole-glycerophosphate-dehydratase-protein-in-staphylococcus-xylosus
#11
Xing-Ru Chen, Xiao-Ting Wang, Mei-Qi Hao, Yong-Hui Zhou, Wen-Qiang Cui, Xiao-Xu Xing, Chang-Geng Xu, Jing-Wen Bai, Yan-Hua Li
The imidazole glycerophosphate dehydratase (IGPD) protein is a therapeutic target for herbicide discovery. It is also regarded as a possible target in Staphylococcus xylosus (S. xylosus) for solving mastitis in the dairy cow. The 3D structure of IGPD protein is essential for discovering novel inhibitors during high-throughput virtual screening. However, to date, the 3D structure of IGPD protein of S. xylosus has not been solved. In this study, a series of computational techniques including homology modeling, Ramachandran Plots, and Verify 3D were performed in order to construct an appropriate 3D model of IGPD protein of S...
2017: Frontiers in Chemistry
https://www.readbyqxmd.com/read/29174143/intramammary-infections-with-different-non-aureus-staphylococci-in-dairy-cows
#12
A-K Nyman, C Fasth, K Persson Waller
Subclinical mastitis causes an increase in milk somatic cell count (SCC) and can lead to reduced milk production and early culling. In many countries, non-aureus staphylococci (NAS) is the most common bacterial finding in subclinical mastitis of dairy cows. New methodology makes it possible to identify NAS species, but knowledge about the epidemiology is limited. The objective of this project was to improve advisory services for mastitis control by investigating associations between NAS and SCC, milk production, and persistence of intramammary infections (IMI)...
November 22, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/29163651/molecular-detection-of-virulence-genes-and-multi-drug-resistance-patterns-in-escherichia-coli-stec-in-clinical-bovine-mastitis-alborz-province-iran
#13
M Tavakoli, H Pourtaghi
The aim of this study was to identify virulence genes and antimicrobial resistance of Escherichia coli isolated from bovine clinical mastitis in dairy herds in Iran. Sampling was done from 86 inflamed quarters of dairy cows in 8 commercial farms of Alborz province, Iran in summer 2015. Shiga toxin-producing E. coli (STEC) virulence genes were detected by multiplex PCR and multi-drug resistance profiles were confirmed using disk diffusion method. Among 60 E. coli isolated from examined samples, 13 (21.6%) of them were STEC...
2017: Iranian Journal of Veterinary Research
https://www.readbyqxmd.com/read/29158993/antimicrobial-consumption-on-austrian-dairy-farms-an-observational-study-of-udder-disease-treatments-based-on-veterinary-medication-records
#14
Clair L Firth, Annemarie Käsbohrer, Corina Schleicher, Klemens Fuchs, Christa Egger-Danner, Martin Mayerhofer, Hermann Schobesberger, Josef Köfer, Walter Obritzhauser
Background: Antimicrobial use in livestock production is an important contemporary issue, which is of public interest worldwide. Antimicrobials are not freely available to Austrian farmers and can only be administered to livestock by veterinarians, or by farmers who are trained members of the Animal Health Service. Since 2015, veterinarians have been required by law to report antimicrobials dispensed to farmers for use in food-producing animals. The study presented here went further than the statutory framework, and collected data on antimicrobials dispensed to farmers and those administered by veterinarians...
2017: PeerJ
https://www.readbyqxmd.com/read/29157376/epidemiological-and-partial-budget-analysis-for-treatment-of-subclinical-staphylococcus-aureus-intramammary-infections-considering-microbiological-and-cytological-scenarios
#15
Inge-Marié Petzer, Eric M C Etter, Edward F Donkin, Edward C Webb, Joanne Karzis
An innovative method was investigated to aid in the elimination of Staphylococcus aureus (S. aureus) intramammary infections (IMI) from dairy herds. A stochastic model explore the economic benefit of three-day or eight-day treatment of subclinical IMI in all S. aureus infected cows or in only those with a somatic cell count (SCC) exceeding 200,000 cells/ml. An epidemiological model was developed to run parallel to the economic model that would predict the S. aureus IMI likely to persist, develop new infections and clinical mastitis...
December 1, 2017: Preventive Veterinary Medicine
https://www.readbyqxmd.com/read/29154739/oxidative-stress-induced-inflammatory-responses-and-effects-of-n-acetylcysteine-in-bovine-mammary-alveolar-cells
#16
Hyojin Bae, Chang Hee Jeong, Wei Nee Cheng, Kwonho Hong, Han Geuk Seo, Sung Gu Han
Bovine mastitis, an inflammation of the udder, results in reduced milk production and poor milk quality. Mastitis is usually, but not always, a response to pathogen infection. High milk yield can produce oxidative stress in the mammary tissue. High milk yield is also known to be associated with bovine mastitis. Thus, in the current study, we hypothesised that oxidative stress increases inflammatory responses in bovine mammary cells. To examine the hypothesis, we produced cellular oxidative stress and investigated resulting inflammatory responses in bovine mammary alveolar cells (MAC-T)...
November 2017: Journal of Dairy Research
https://www.readbyqxmd.com/read/29154735/rumination-time-as-a-potential-predictor-of-common-diseases-in-high-productive-holstein-dairy-cows
#17
Riccardo Moretti, Stefano Biffani, Francesco Tiezzi, Christian Maltecca, Stefania Chessa, Riccardo Bozzi
We examined the hypothesis that rumination time (RT) could serve as a useful predictor of various common diseases of high producing dairy cows and hence improve herd management and animal wellbeing. We measured the changes in rumination time (RT) in the days before the recording of diseases (specifically: mastitis, reproductive system diseases, locomotor system issues, and gastroenteric diseases). We built predictive models to assess the association between RT and these diseases, using the former as the outcome variable, and to study the effects of the latter on the former...
November 2017: Journal of Dairy Research
https://www.readbyqxmd.com/read/29153520/retrospective-analysis-of-austrian-health-recording-data-of-antibiotic-or-nonantibiotic-dry-off-treatment-on-milk-yield-somatic-cell-count-and-frequency-of-mastitis-in-subsequent-lactation
#18
T Wittek, A Tichy, B Grassauer, C Egger-Danner
Typically, dairy cows are dried off at the end of lactation. During the dry period, intramammary infections may be cured or persist, and new infections may occur. Traditionally, antibiotics (AB) have been used at dry-off. However, blanket antibiotic dry-off treatment may no longer be justifiable and, recently, selective use of antibiotics at dry off has been proposed and different decision criteria suggested. The objective of the study was to evaluate cows receiving antibiotic treatment at dry off (AB group) compared with cows dried off without antibiotics (non-AB group) using a large data set...
November 15, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/29153171/a-100-year-review-mastitis-detection-management-and-prevention
#19
Pamela L Ruegg
Mastitis is the most frequent disease of dairy cows and has well-recognized detrimental effects on animal wellbeing and dairy farm profitability. Since the beginning of modern dairy farming, producers have sought effective methods to minimize the occurrence of mastitis in their herds. The objective of this paper is to review and highlight important advances in detection, management, and prevention of mastitis that have occurred since the first volume of the Journal of Dairy Science was published in 1917. Initial research efforts were directed at understanding the nature of pathogenic bacteria that were responsible for most intramammary infections...
December 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/29143705/rumination-time-and-monitoring-of-health-disorders-during-early-lactation
#20
S Paudyal, F P Maunsell, J T Richeson, C A Risco, D A Donovan, P J Pinedo
The objective was to evaluate the association between changes in daily rumination time (dRT) and early stages of disease during early lactation and to assess the performance of two proposed disease detection indices. This cohort study included 210 multiparous Holstein cows at the University of Florida Dairy Unit. Cows were affixed with a neck collar containing rumination loggers providing rumination time. The occurrence of health disorders (mastitis, metritis, clinical hypocalcemia, depression/dehydration/fever (DDF), digestive conditions, lameness and clinical ketosis) was assessed until 60 days in milk...
November 16, 2017: Animal: An International Journal of Animal Bioscience
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