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dairy cow mastitis

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https://www.readbyqxmd.com/read/28229929/intramammary-1-25-dihydroxyvitamin-d3-treatment-increases-expression-of-host-defense-genes-in-mammary-immune-cells-of-lactating-dairy-cattle
#1
Kathryn E Merriman, Michael B Poindexter, Mercedes F Kweh, Jose E P Santos, Corwin D Nelson
Bacterial infection of the mammary gland activates an intracrine vitamin D pathway in macrophages of dairy cows. The active hormone of the vitamin D pathway, 1,25-dihydroxyvitamin D3 (1,25D), stimulates nitric oxide and β-defensin responses in bovine monocyte cultures, but the effect of 1,25D on innate immune genes in the mammary gland remained unknown. Therefore, the objective of this study was to determine the effects intramammary 1,25D treatment on expression of vitamin D associated host-defenses of the bovine mammary gland...
February 13, 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/28222802/counts-of-bovine-monocyte-subsets-prior-to-calving-are-predictive-for-postpartum-occurrence-of-mastitis-and-metritis
#2
Brianna Pomeroy, Anja Sipka, Jamal Hussen, Melanie Eger, Ynte Schukken, Hans-Joachim Schuberth
The heightened susceptibility to infectious diseases in postpartum dairy cows is often attributed to immune dysfunction associated with the transition period. However, the cell populations involved in this immune dysfunction and the dynamics between those populations are not well defined. Monocytes play a crucial role in governing initial immune response in bacterial infections. Bovine monocytes are subdivided in classical (CD14(+)/CD16(-)), intermediate (CD14(+)/CD16(+)) and non-classical monocytes (CD14(-)/CD16(+)) with distinct phenotypic and functional differences...
February 21, 2017: Veterinary Research
https://www.readbyqxmd.com/read/28219684/development-of-magnetic-nanoparticle-based-calorimetric-assay-for-the-detection-of-bovine-mastitis-in-cow-milk
#3
Raja Chinnappan, Sana Al Attas, Gerrit Koop, Tine van Werven, Wendy E Kaman, Floris J Bikker, Mohammed Zourob
Mastitis in dairy cattle is an inflammatory reaction of the udder tissue. Mastitis increases plasmin levels, leading to an increased proteolysis of milk proteins such as casein, resulting in a significant decrease in milk quality and related dairy products. Due to its key-role in mastitis, we used plasmin proteolytic activity as a biomarker for the detection of mastitis in bovine mastitic milk. Inspired by earlier studies on protease activity using mastitic milk samples, we developed a simple colorimetric assay to distinguish mastitic milk from milk derived from healthy animals...
February 17, 2017: Analytical Biochemistry
https://www.readbyqxmd.com/read/28196553/association-between-body-energy-content-in-the-dry-period-and-post-calving-production-disease-status-in-dairy-cattle
#4
G L Smith, N C Friggens, C J Ashworth, M G G Chagunda
The transition from gestation to lactation is marked by significant physiological changes for the individual cow such that disease incidence is highest in early lactation. Around the time of calving, cows rely on mobilisation of body energy reserves to fill the energy deficit created by an increase in nutrient demands at a time of restricted feed intake. It is well established that monitoring of body energy reserves in lactation is an important component of herd health management. However, despite their influence on future health and productivity, monitoring of body energy reserves in the dry period is often sparse...
February 15, 2017: Animal: An International Journal of Animal Bioscience
https://www.readbyqxmd.com/read/28188901/trueperella-pyogenes-isolated-from-dairy-cows-with-endometritis-in-inner-mongolia-china-tetracycline-susceptibility-and-tetracycline-resistance-gene-distribution
#5
Dexian Zhang, Jingcui Zhao, Qiuxia Wang, Yaochuan Liu, Chunlian Tian, Yujun Zhao, Lihui Yu, Mingchun Liu
Trueperella pyogenes plays a crucial role in endometritis pathogenesis and is also associated with many infections, including metritis, mastitis, arthritis and liver abscessation, in many domestic animals. In this study, we investigated the prevalence of tetracycline resistance in T. pyogenes isolated from dairy cows with endometritis in Inner Mongolia, China, and we assessed tetracycline-resistance gene distribution among the isolates. Our results indicated that 68.7% and 62.5% of the isolates were resistant to tetracycline and doxycycline, respectively, and the rate of resistance to metacycline was 18...
February 8, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28185209/meta-analysis-of-the-prevalence-of-mastitis-and-associated-risk-factors-in-dairy-cattle-in-ethiopia
#6
Abraham Mekibeb Getaneh, Endrias Zewdu Gebremedhin
Mastitis is among the most prevalent disease that contributes for the reduction of milk production in dairy herds. Although several published studies have estimated the prevalence of mastitis, variation among studies is great. The objective of the present meta-analysis was to provide a pooled estimate of the prevalence of overall, clinical, and subclinical mastitis in dairy cattle in Ethiopia. A pooled estimate was also conducted by potential risk factors. The literature search was restricted to studies published in English language from January 2002 to June 2016...
February 9, 2017: Tropical Animal Health and Production
https://www.readbyqxmd.com/read/28174566/application-of-a-dot-blot-hybridization-platform-to-assess-streptococcus-uberis-population-structure-in-dairy-herds
#7
Pedro Albuquerque, Niza Ribeiro, Alexandre Almeida, Irena Panschin, Afonso Porfirio, Marta Vales, Francisca Diniz, Helena Madeira, Fernando Tavares
Streptococcus uberis is considered one of the most important pathogens associated with bovine mastitis. While traditionally acknowledged as an environmental pathogen, S. uberis has been shown to adopt a contagious epidemiological pattern in several dairy herds. Since different control strategies are employed depending on the mode of transmission, in-depth studies of S. uberis populations are essential to determine the best practices to control this pathogen. In this work, we optimized and validated a dot blot platform, combined with automatic image analysis, to rapidly assess the population structure of infective S...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28161183/investigation-of-the-effect-of-pegbovigrastim-on-some-periparturient-immune-disorders-and-performance-in-mexican-dairy-herds
#8
R Ruiz, L O Tedeschi, A Sepúlveda
This study analyzed the efficacy of pegbovigrastim (Imrestor, Elanco Animal Health, Greenfield, IN) on some health and production parameters in lactating dairy cows. Primiparous and multiparous Holsteins from 17 Mexican dairy herds (n = 10,238) were included in this study, which was conducted in 2015. Treated cows (n = 5,025) received Imrestor approximately 7 d before expected calving and again within 24 h after calving; control cows (n = 5,213) did not receive a placebo. Clinical mastitis (MAS; 0 to 30 DIM), retained placenta (RP), and clinical metritis (MET; 0 to 21 DIM) occurrences were recorded, as well as the number of medication days, medical treatments needed, and the number of days that milk was discarded due to medication administered for disease...
February 1, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28161180/clinical-outcome-comparison-of-immediate-blanket-treatment-versus-a-delayed-pathogen-based-treatment-protocol-for-clinical-mastitis-in-a-new-york-dairy-herd
#9
A K Vasquez, D V Nydam, M B Capel, S Eicker, P D Virkler
The purpose was to compare immediate intramammary antimicrobial treatment of all cases of clinical mastitis with a selective treatment protocol based on 24-h culture results. The study was conducted at a 3,500-cow commercial farm in New York. Using a randomized design, mild to moderate clinical mastitis cases were assigned to either the blanket therapy or pathogen-based therapy group. Cows in the blanket therapy group received immediate on-label intramammary treatment with ceftiofur hydrochloride for 5 d. Upon receipt of 24 h culture results, cows in the pathogen-based group followed a protocol automatically assigned via Dairy Comp 305 (Valley Agricultural Software, Tulare, CA): Staphylococcus spp...
February 1, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28155803/non-antibiotic-approaches-at-drying-off-for-treating-and-preventing-intramammary-infections-a-protocol-for-a-systematic-review-and-meta-analysis
#10
David Francoz, Vincent Wellemans, Jean-Philippe Roy, Pierre Lacasse, Alfredo Ordonez-Iturriaga, François Labelle, Simon Dufour
Intramammary infection (IMI) treatment and prevention at drying-off is one of the leading causes for using antimicrobials on dairy farms. The objective of the current paper is to describe the protocol used for conducting a systematic review of the literature on non-antibiotic strategies that can be used on dairy cows at dry off to treat and prevent IMI. Relevant literature will be identified using a combination of database search strategies and iterative screening of references. To be included in the review, articles will have to: (1) be published after 1969; (2) be written in English, French, or Spanish; (3) use a study design such as a controlled trial, an observational study, or an experimental study conducted in vivo; (4) be conducted on commercial dairy cows; (5) investigate a non-antibiotic intervention used at dry off; and finally, (6) report on a relevant mastitis outcome...
December 2016: Animal Health Research Reviews
https://www.readbyqxmd.com/read/28152597/gc-ms-metabolomics-identifies-metabolite-alterations-that-precede-subclinical-mastitis-in-the-blood-of-transition-dairy-cows
#11
Elda Dervishi, Guanshi Zhang, Suzanna M Dunn, Rupasri Mandal, David S Wishart, Burim N Ametaj
The objectives of this study were to determine alterations in the serum metabolites related to amino acid (AA), carbohydrate, and lipid metabolism in transition dairy cows before diagnosis of subclinical mastitis (SCM), during, and after diagnosis of disease. A subclinical mastitis case was determined as a cow having somatic cell count (SCC) > 200 000/mL of milk for two or more consecutive reports. Blood samples were collected from 100 Holstein dairy cows at five time points at -8 and -4 weeks before parturition, at the week of SCM diagnosis, and +4 and +8 weeks after parturition...
February 3, 2017: Journal of Proteome Research
https://www.readbyqxmd.com/read/28131570/relationship-between-milk-cathelicidin-abundance-and-microbiologic-culture-in-clinical-mastitis
#12
M F Addis, V Bronzo, G M G Puggioni, C Cacciotto, V Tedde, D Pagnozzi, C Locatelli, A Casula, G Curone, S Uzzau, P Moroni
The availability of reliable tools to enable the sensitive and specific detection of mastitis in dairy cows can assist in developing control strategies and promote the more rational use of antibiotics. We have developed a milk cathelicidin ELISA that shows high sensitivity and specificity for dairy cow mastitis, based on latent class analysis. In this study, we investigated the effect of microbial agents on cathelicidin abundance in the milk of cows with clinical mastitis. We subjected 535 quarter milk samples (435 from quarters showing signs of clinical mastitis and 100 from healthy quarters as a control) to milk cathelicidin ELISA, somatic cell count (SCC), and microbiologic culture...
January 25, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28109600/supplementation-of-linoleic-acid-c18-2n-6-or-%C3%AE-linolenic-acid-c18-3n-3-changes-microbial-agonist-induced-oxylipid-biosynthesis
#13
V E Ryman, N Packiriswamy, B Norby, S E Schmidt, A L Lock, L M Sordillo
Oxylipids are derived from polyunsaturated fatty acids (PUFA) in cellular membranes and the relative abundance or balance may contribute to disease pathogenesis. Previous studies documented unique oxylipid profiles from cows with either coliform or Streptococcus uberis mastitis, suggesting that lipid mediator biosynthesis may be dependent on the type of microbial-derived agonist. Changing the fatty acid content of peripheral blood leukocytes also may be critical to the relative expression of oxylipid profiles and the outcome of bacterial infection...
March 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28109599/effect-of-intramammary-infusion-of-chitosan-hydrogels-at-drying-off-on-bovine-mammary-gland-involution
#14
S Lanctôt, P Fustier, A R Taherian, B Bisakowski, X Zhao, P Lacasse
The transition from lactation to the dry period in dairy cows is a period of high risk for acquiring new intramammary infections. This risk is reduced when the involution of the mammary gland is completed. Accordingly, approaches that speed up the involution process after drying-off could reduce the incidence of mastitis. The current study aimed to develop a biological response modifier that could be injected into cow teats to promote immune cell migration and speed up involution. Chitosan, a natural polysaccharide derived from chitin, is able to trigger host innate immunity...
March 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28109591/udder-firmness-as-a-possible-indicator-for-clinical-mastitis
#15
A Rees, C Fischer-Tenhagen, W Heuwieser
Swelling of the mammary gland is an important sign to detect clinical mastitis (CM) in dairy cows. The overall objective of this study was to evaluate if udder firmness can be used as a cow-side indicator for mastitis and to evaluate how CM affects firmness within 14 d after diagnosis. A dynamometer was used to objectively determine udder firmness before and after milking in 45 cows with CM and 95 healthy cows. Udder firmness of both hind quarters was measured daily on 3 locations (upper, middle, lower measuring point) from the day of mastitis diagnosis until d 7 and again on d 14...
March 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28109587/effect-of-transitioning-to-automatic-milking-systems-on-producers-perceptions-of-farm-management-and-cow-health-in-the-canadian-dairy-industry
#16
C Tse, H W Barkema, T J DeVries, J Rushen, E A Pajor
Automatic milking systems (AMS), or milking robots, are becoming increasingly common, but there is little documentation of how AMS have affected farms as a whole and what challenges and benefits producers are experiencing during their transition to AMS. The objective of this national survey was to document the effect of transitioning to AMS on producer perceptions of change in housing, farm management, and cow health. In total, 217 AMS producers were surveyed from 8 Canadian provinces. Median time since transition for respondents was 30 mo...
March 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28103794/genomic-and-transcriptomic-comparison-between-staphylococcus-aureus-strains-associated-with-high-and-low-within-herd-prevalence-of-intra-mammary-infection
#17
E Capra, P Cremonesi, A Pietrelli, S Puccio, M Luini, A Stella, B Castiglioni
BACKGROUND: Staphylococcus aureus (Staph. aureus) is one of the major pathogens causing mastitis in dairy ruminants worldwide. The chronic nature of Staph. aureus infection enhances the contagiousness risk and diffusion in herds. In order to identify the factors involved in intra-mammary infection (IMI) and diffusion in dairy cows, we investigated the molecular characteristics of two groups of Staph. aureus strains belonging to ST8 and ST398, differing in clinical properties, through comparison of whole genome and whole transcriptome sequencing...
January 19, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/28101335/novel-snps-in-il-17f-and-il-17a-genes-associated-with-somatic-cell-count-in-chinese-holstein-and-inner-mongolia-sanhe-cattle
#18
Tahir Usman, Yachun Wang, Chao Liu, Yanghua He, Xiao Wang, Yichun Dong, Hongjun Wu, Airong Liu, Ying Yu
BACKGROUND: Bovine mastitis is the most common and costly disease of lactating cattle worldwide. Apart from milk somatic cell count (SCC) and somatic cell score (SCS), serum cytokines such as interleukin-17 (IL-17) and interleukin-4 (IL-4) may also be potential indicators for bovine mastitis. The present study was designed to investigate the effects of single nucleotide polymorphisms (SNPs) in bovine IL-17F and IL-17A genes on SCC, SCS and serum cytokines in Chinese Holstein and Inner-Mongolia Sanhe cattle, and to compare the mRNA expression variations of the cows with different genotypes...
2017: Journal of Animal Science and Biotechnology
https://www.readbyqxmd.com/read/28092619/concentration-of-lactoferrin-and-immunoglobulin-g-in-cows-milk-in-relation-to-health-status-of-the-udder-lactation-and-season
#19
K Musayeva, A Sederevičius, R Želvytė, I Monkevičienė, D Beliavska-Aleksiejūnė, S Kerzienė
The aim of this study was to analyze an effect of udder health status, somatic cell count (SCC), stage and number of lactations, and different seasons on the concentration of lactoferrin (LF) and immunoglobulin G (IgG) in quarter milk samples (n=120) from crossbreed (Lithuanian Black-and-White & Holstein) dairy cows. Quarter health status was based on SCC and microbiological analysis. The highest mean value of LF and IgG were observed in quarters with subclinical mastitis 0.1 ± 0.02 mg/ml and 0.41 ± 0.06 mg/ml, respectively...
December 1, 2016: Polish Journal of Veterinary Sciences
https://www.readbyqxmd.com/read/28092611/prevalence-of-bovine-herpesvirus-type-4-in-aborting-dairy-cows
#20
Đ Cvetojević, B Savić, V Milićević, B Kureljušić, N Jezdimirović, D Jakić-Dimić, M Pavlović, Lj Spalević
Bovine herpesvirus type 4 (BHV-4) is related to many different conditions: infertility, postpartal metritis, vulvovaginitis, mastitis, encephalitis, calf pneumonia, keratoconjunctivitis, cutaneous lesions, digital dermatitis and abortion. In this study a retrospective PCR examination of 100 extracted DNA samples from aborting cows was performed in order to determine: prevalence of BHV-4 in abortive cattle, whether coinfections BHV-4 with other abortifacient pathogens are present in the same sample and to determine the month of gestation when BHV-4 associated abortions were detected...
December 1, 2016: Polish Journal of Veterinary Sciences
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