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dairy cow mastitis

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https://www.readbyqxmd.com/read/28731206/comparative-plasma-and-interstitial-fluid-pharmacokinetics-of-flunixin-meglumine-and-ceftiofur-hydrochloride-following-individual-and-co-administration-in-dairy-cows
#1
P J Gorden, M D Kleinhenz, L W Wulf, S J Rajewski, C Wang, R Gehring, J F Coetzee
Ceftiofur (CEF) and flunixin meglumine (FLU) are two drugs approved for use in beef and dairy cattle that are frequently used in combination for many diseases. These two drugs are the most commonly used drugs in dairy cattle in their respective drug classes. Two research groups have recently published manuscripts demonstrating altered pharmacokinetics of FLU and CEF in cows affected with naturally occurring mastitis. The objective of this study was to determine whether pharmacokinetics of flunixin meglumine administered intravenously or intramuscularly administered ceftiofur hydrochloride would be altered when co-administered versus individual administration to healthy dairy cattle...
July 21, 2017: Journal of Veterinary Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/28727781/escherichia-coli-mastitis-strains-in-vitro-phenotypes-and-severity-of-infection-in-vivo
#2
Perrine Roussel, Adeline Porcherie, Maryline Répérant-Ferter, Patricia Cunha, Christophe Gitton, Pascal Rainard, Pierre Germon
Mastitis remains a major infection of dairy cows and an important issue for dairy farmers and the dairy industry, in particular infections due to Escherichia coli strains. So far, properties specific to E. coli causing mastitis remain ill defined. In an attempt to better understand the properties required for E. coli to trigger mastitis, we used a range of in vitro assays to phenotypically characterize four E. coli strains, including the prototypical E. coli mastitis strain P4, possessing different relative abilities to cause mastitis in a mouse model...
2017: PloS One
https://www.readbyqxmd.com/read/28716206/contextual-herd-factors-associated-with-cow-culling-risk-in-qu%C3%A3-bec-dairy-herds-a-multilevel-analysis
#3
Denis Haine, Hector Delgado, Roger Cue, Asheber Sewalem, Kevin Wade, René Lacroix, Daniel Lefebvre, Julie Arsenault, Émile Bouchard, Jocelyn Dubuc
Several health disorders, such as milk fever, displaced abomasum, and mastitis, as well as impaired reproductive performance, are known risk factors for the removal of affected cows from a dairy herd. While cow-level risk factors are well documented in the literature, herd-level associations have been less frequently investigated. The objective of this study was to investigate the effect of cow- and herd-level determinants on variations in culling risk in Québec dairy herds: whether herd influences a cow's culling risk...
September 1, 2017: Preventive Veterinary Medicine
https://www.readbyqxmd.com/read/28716189/prediction-of-streptococcus-uberis-clinical-mastitis-risk-using-matrix-assisted-laser-desorption-ionization-time-of-flight-mass-spectrometry-maldi-tof-ms-in-dairy-herds
#4
Simon C Archer, Andrew J Bradley, Selin Cooper, Peers L Davies, Martin J Green
The purpose of this study was to evaluate whether the risk of Streptococcus uberis clinical mastitis at cow level could be predicted from the historical presence of specific strains of S. uberis on dairy farms. Matrix-assisted laser desorption ionization time of flight mass spectrometry was used to identify S. uberis isolates potentially capable of contagious transmission. Data were available from 10,652 cows from 52 English and Welsh dairy farms over a 14 month period, and 521 isolates of S. uberis from clinical mastitis cases were available for analysis...
September 1, 2017: Preventive Veterinary Medicine
https://www.readbyqxmd.com/read/28713793/phenotypic-antimicrobial-resistance-profile-of-isolates-causing-clinical-mastitis-in-dairy-animals
#5
Carlotta Ceniti, Domenico Britti, Adriano Michele Luigi Santoro, Rosanna Musarella, Lucia Ciambrone, Francesco Casalinuovo, Nicola Costanzo
Mastitis is the most frequent and costly disease of lactating animals and is associated with a significant reduction in milk yield, increased cost and culling. Early and specific antibiotic based treatment reduces the severity of the disease. Over the years the extensive use of antimicrobials has led to increase antimicrobial resistance. The present study was designed to investigate the prevalence of microorganisms responsible for mastitis and their antimicrobial resistance pattern. A total of 282 milk samples were collected from different animal species (sheep, cows and goats) with clinical mastitis...
April 13, 2017: Italian Journal of Food Safety
https://www.readbyqxmd.com/read/28711267/a-comparative-study-of-the-in-vitro-activity-of-iodopropynyl-butylcarbamate-and-amphotericin-b-against-prototheca-spp-isolates-from-european-dairy-herds
#6
T Jagielski, Z Bakuła, S Di Mauro, C Casciari, V Cambiotti, H Krukowski, B Turchetti, M Ricchi, E Manuali, P Buzzini
The objective of this study was to assess the in vitro effect of iodopropynyl butylcarbamate (IPBC) and amphotericin B (AMB) on Prototheca zopfii genotype 2 and Prototheca blaschkeae isolates recovered from dairy herds of Belgium, France, Italy, Germany, and Poland. The combination of IPBC with AMB on Prototheca isolates and toxicity of IPBC to the bovine mammary epithelial cells were also evaluated. The in vitro activity of IPBC and AMB against 96 isolates of P. zopfii genotype 2 and 42 isolates of P. blaschkeae was performed...
July 12, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28711261/the-effect-of-mycobacterium-avium-subspecies-paratuberculosis-infection-on-clinical-mastitis-occurrence-in-dairy-cows
#7
G Rossi, Y T Grohn, Y H Schukken, R L Smith
Endemic diseases can be counted among the most serious sources of losses for livestock production. In dairy farms in particular, one of the most common diseases is Johne's disease, caused by Mycobacterium avium ssp. paratuberculosis (MAP). Infection with MAP causes direct costs because it affects milk production, but it has also been suspected to increase the risk of clinical mastitis (CM) among infected animals. This might contribute to further costs for farmers. We asked whether MAP infection represents a risk factor for CM and, in particular, whether CM occurrences were more common in MAP-infected animals...
July 12, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28701082/bovine-mastitis-prevention-humoral-and-cellular-response-of-dairy-cows-inoculated-with-lactic-acid-bacteria-at-the-dry-off-period
#8
M Pellegrino, N Berardo, J Giraudo, M E F Nader-Macías, C Bogni
The use of lactic acid bacteria (LAB) in animal feed, constitute an alternative tool for bovine mastitis prevention. Previously, two LAB strains were isolated from bovine milk and selected for their probiotics properties. So far, immune response of inoculating LAB in bovine udders at dry-off period has not been investigated. The immunoglobulin isotype levels and memory cell proliferation in blood and milk of animals inoculated with Lactobacillus lactis subsp. lactis CRL1655 and Lactobacillus perolens CRL1724 at dry-off period was studied...
July 13, 2017: Beneficial Microbes
https://www.readbyqxmd.com/read/28697611/comparison-of-cow-side-diagnostic-tests-for-subclinical-mastitis-of-dairy-cows-in-musanze-district-rwanda
#9
Blaise Iraguha, Humphrey Hamudikuwanda, Borden Mushonga, Erick Kandiwa, Jean P Mpatswenumugabo
Four subclinical mastitis diagnostic tests (the UdderCheck® test [a lactate dehydrogenasebased test], the California Mastitis Test [CMT], the Draminski® test [a conductivity-based test] and the PortaSCC® test [a portable somatic cell count-based test]) were compared in a study comprising crossbreed dairy cows (n = 30) during September and October 2015. Sensitivity and specificity of the CMT, Draminski® and UdderCheck® tests were compared with the PortaSCC® as reference. The CMT, Draminski® and UdderCheck® test results were compared with the results of the PortaSCC® test using kappa statistics...
June 21, 2017: Journal of the South African Veterinary Association
https://www.readbyqxmd.com/read/28690278/cellular-and-soluble-components-decrease-the-viable-pathogen-counts-in-milk-from-dairy-cows-with-subclinical-mastitis
#10
Tomoko Koshiishi, Masako Watanabe, Hajime Miyake, Keiichi Hisaeda, Naoki Isobe
The present study was undertaken to clarify the factors that reduce the viable pathogen count in milk collected from the udders of subclinical mastitic cows during preservation. Milk was centrifuged to divide somatic cells (cellular components, precipitates) and antimicrobial peptides (soluble components, supernatants without fat layer); each fraction was cultured with bacteria, and the number of viable bacteria was assessed prior to and after culture. In 28.8% of milk samples, we noted no viable bacteria immediately after collection; this value increased significantly after a 5-hr incubation of milk with cellular components but not with soluble components (48...
July 7, 2017: Journal of Veterinary Medical Science
https://www.readbyqxmd.com/read/28690058/flow-cytometric-assessment-of-myeloperoxidase-in-bovine-blood-neutrophils-and-monocytes
#11
Elke Depreester, Evelyne Meyer, Kristel Demeyere, Mieke Van Eetvelde, Miel Hostens, Geert Opsomer
Myeloperoxidase (MPO) is a lysosomal peroxidase enzyme mainly stored in the azurophilic granules of neutrophils playing an important role in innate immunity for first-line protection against microorganisms in many species including cattle. As such, determination of MPO has become of great interest for the diagnosis of infectious and inflammatory diseases in multiple species such as humans. In cattle, MPO determination is rarely done because methods to assess MPO in this species are limited: functional assays have been described earlier, but so far, the quantification of MPO at the single cell level has not been done yet...
July 6, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28688615/innovative-dairy-cow-management-to-improve-resistance-to-metabolic-and-infectious-diseases-during-the-transition-period
#12
REVIEW
P Lacasse, N Vanacker, S Ollier, C Ster
The incidence of metabolic and infectious diseases varies greatly during the lactation cycle. Most new cases of clinical mastitis appear at the beginning of lactation, and the incidence increases with the level of milk production. In addition to mastitis, many other infectious diseases become clinically apparent during the first 2weeks of lactation. During this time, cows are in a negative energy balance and must mobilize body reserves to balance the deficit between food energy intake and energy required for milk production...
June 27, 2017: Research in Veterinary Science
https://www.readbyqxmd.com/read/28651665/using-milk-leukocyte-differentials-for-diagnosis-of-subclinical-bovine-mastitis
#13
Juliano Leonel Gonçalves, Roberta L Lyman, Mitchell Hockett, Rudy Rodriguez, Marcos Veiga Dos Santos, Kevin L Anderson
This research study aimed to evaluate the use of the milk leukocyte differential (MLD) to: (a) identify quarter milks that are culture-positive; and (b) characterize the milk leukocyte responses to specific groups of pathogens causing subclinical mastitis. The MLD measures the absolute number and relative percentage of inflammatory cells in milk samples. Using the MLD in two dairy herds (170 and 172 lactating cows, respectively), we studied all lactating cows with a most recent monthly Dairy Herd Improvement Association somatic cell count (SCC) >200 × 103 cells/ml...
June 27, 2017: Journal of Dairy Research
https://www.readbyqxmd.com/read/28647335/incidence-and-duration-of-increased-somatic-cell-count-in-swedish-dairy-cows-and-associations-with-milking-system-type
#14
J Frössling, A Ohlson, C Hallén-Sandgren
Mastitis is one of the most costly diseases in dairy cows worldwide. Increased somatic cell count (SCC) is an indication of mastitis, often subclinical, which implies bacterial infection without clinical signs of inflammation. The aim was to investigate the occurrence of elevated udder SCC (defined as ≥200,000 cells/mL) over the lactation period, and before and after the dry period, for cows of different parity. The aim was also to analyze the association between prevalence and incidence of increased udder SCC and information on cow and herd level, such as breed and milking system type...
June 21, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28637532/estimating-the-economic-impact-of-subclinical-ketosis-in-dairy-cattle-using-a-dynamic-stochastic-simulation-model
#15
P F Mostert, E A M Bokkers, C E van Middelaar, H Hogeveen, I J M de Boer
The objective of this study was to estimate the economic impact of subclinical ketosis (SCK) in dairy cows. This metabolic disorder occurs in the period around calving and is associated with an increased risk of other diseases. Therefore, SCK affects farm productivity and profitability. Estimating the economic impact of SCK may make farmers more aware of this problem, and can improve their decision-making regarding interventions to reduce SCK. We developed a dynamic stochastic simulation model that enables estimating the economic impact of SCK and related diseases (i...
June 22, 2017: Animal: An International Journal of Animal Bioscience
https://www.readbyqxmd.com/read/28635647/virulence-genes-of-s-aureus-from-dairy-cow-mastitis-and-contagiousness-risk
#16
Giada Magro, Stefano Biffani, Giulietta Minozzi, Ralf Ehricht, Stefan Monecke, Mario Luini, Renata Piccinini
Staphylococcus aureus (S. aureus) is a major agent of dairy cow intramammary infections: the different prevalences of mastitis reported might be related to a combination of S. aureus virulence factors beyond host factors. The present study considered 169 isolates from different Italian dairy herds that were classified into four groups based on the prevalence of S. aureus infection at the first testing: low prevalence (LP), medium-low (MLP), medium-high (MHP) and high (HP). We aimed to correlate the presence of virulence genes with the prevalence of intramammary infections in order to develop new strategies for the control of S...
June 21, 2017: Toxins
https://www.readbyqxmd.com/read/28626609/detection-and-drug-resistance-profile-of-escherichia-coli-from-subclinical-mastitis-cows-and-water-supply-in-dairy-farms-in-saraburi-province-thailand
#17
Woranich Hinthong, Natapol Pumipuntu, Sirijan Santajit, Suphang Kulpeanprasit, Shutipen Buranasinsup, Nitat Sookrung, Wanpen Chaicumpa, Pisinee Aiumurai, Nitaya Indrawattana
Subclinical mastitis is a persistent problem in dairy farms worldwide. Environmental Escherichia coli is the bacterium predominantly responsible for this condition. In Thailand, subclinical mastitis in dairy cows is usually treated with various antibiotics, which could lead to antibiotic resistance in bacteria. E. coli is also a reservoir of many antibiotic resistance genes, which can be conveyed to other bacteria. In this study, the presence of E. coli in milk and water samples was reported, among which enteropathogenic E...
2017: PeerJ
https://www.readbyqxmd.com/read/28625182/bovine-intra-mammary-challenge-with-streptococcus-dysgalactiae-spp-dysgalactiae-to-explore-the-effect-on-the-response-of-complement-activity
#18
Susan Maye, James Flynn, Catherine Stanton, Gerald F Fitzgerald, Philip M Kelly
Recently published work as described by the authors highlighted the extent of Complement activity in bovine milk. Localised mastitis infection occurring in the mammary glands of dairy cows is readily detectable by the levels of somatic cells in milk. Thus, it is opportune to monitor Complement activity in milks in association with the animal's innate immune response to mammary infection. Preliminary screening of milk samples taken randomly showed that milk with a high somatic cell count (SCC) reduced growth of the Complement-sensitive strain E...
June 19, 2017: Journal of Dairy Research
https://www.readbyqxmd.com/read/28624278/estimation-of-prevalence-and-incidence-of-subclinical-mastitis-in-a-large-population-of-brazilian-dairy-herds
#19
Marcos Busanello, Rodolfo S Rossi, Laerte D Cassoli, José C F Pantoja, Paulo F Machado
The objectives of this study were to estimate the prevalence and incidence of subclinical mastitis (SM) in a large population of Brazilian dairy herds and to describe how these indices changed over time. A data set comprising individual cow somatic cell counts (SCC) from 18,316 test days (TD) of 1,809 herds that participated in a Dairy Herd Improvement Association (DHIA) program between January 2011 and May 2015 was available for analysis. Only tests that had ≥10 lactating cows and that were performed at 30 ± 10-d intervals were used for analysis...
June 14, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28622786/dairy-cow-disability-weights
#20
Craig S McConnel, Ashleigh A McNeil, Joleen C Hadrich, Jason E Lombard, Franklyn B Garry, Jane Heller
Over the past 175 years, data related to human disease and death have progressed to a summary measure of population health, the Disability-Adjusted Life Year (DALY). As dairies have intensified there has been no equivalent measure of the impact of disease on the productive life and well-being of animals. The development of a disease-adjusted metric requires a consistent set of disability weights that reflect the relative severity of important diseases. The objective of this study was to use an international survey of dairy authorities to derive disability weights for primary disease categories recorded on dairies...
August 1, 2017: Preventive Veterinary Medicine
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