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Vieira LV, Savela MFB, Rahal NM, Barbosa AA, Saraiva DR, Del Pino FAB, Rabassa VR, Komninou ER, Brauner CC, Langwinski D, Souza A, Corrêa MN. An assessment on the effects of buffers on the productive, behavioral and metabolic parameters of Holstein dairy cows. Trop Anim Health Prod 2024; 56:255. [PMID: 39240410 DOI: 10.1007/s11250-024-04094-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Accepted: 07/18/2024] [Indexed: 09/07/2024]
Abstract
This study aimed to evaluate the impact of supplementing sodium bicarbonate or a commercial blend of buffering agents (BBA) comprising calcareous calcitic, magnesium oxide, calcareous algae, and sodium bicarbonate on the productive, behavioral and metabolic parameters of Holstein cows fed starchy diets. Over a 60-day trial period, thirty-six multiparous cows with an average milk yield of 38.84 ± 9.24 kg/day and 63.74 ± 18.63 days in milk (DIM), were randomly divided into two groups. The control group (n = 18) received a supplementation of 1.1% dry matter (DM) of sodium bicarbonate (Raudi®, Totalmix, Brazil), while the BBA group (n = 18) was administered with 0.5% DM of a blend of buffering agents (Equalizer®, Nutron/Cargill, Brazil). The mean values of ruminal pH (control 6.80 ± 0.06 and BBA 6.77 ± 0.06; P > 0.05) and volatile fatty acid (VFA) production (control: acetate 62.63 ± 1.29%, propionate 22.99 ± 1.07%, butyrate 14.30 ± 0.52%; BBA: acetate 63.07 ± 1.32%, propionate 23.47 ± 1.10%, butyrate 13.70 ± 0.57%), were similar (P > 0,05) between the two groups. The value of faecal pH was higher (P < 0.05) in the BBA group (6.25 ± 0.02) than the control group (6.12 ± 0.02). Animals treated with BBA exhibited lower (P < 0,05) dry matter intake (DMI) (24.75 ± 0.64 kg/day), higher feed efficiency (FE) (1.64 ± 0.03), and reduced feeding frequency (52.89 ± 3.73 n°/day) than the control group (DMI, 26.75 ± 0.62 kg/day; FE, 1.50 ± 0.03; feeding frequency, 66.07 ± 3.64 n°/day). Milk production remained similar across both groups (control, 39.11 ± 0.92 kg/day and BBA, 39.87 ± 0.92 kg/day; P > 0.05). Notably, the control group displayed a higher (P < 0,05) concentration of milk protein (1.21 ± 0.05 kg/day) than the BBA (1.18 ± 0.05 kg/day) group. The study concluded that both treatments effectively buffered the rumen and mitigated the risk of ruminal acidosis. Moreover, the higher faecal pH in the BBA-treated group suggests potential intestinal action attributable to the synergistic effects of diverse additives with buffering properties. Despite a reduced DMI, BBA-treated animals exhibited improved FE.
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Affiliation(s)
- Laura Valadão Vieira
- Center for Research, Teaching and Extension in Animal Science (NUPEEC), Federal University of Pelotas (UFPEL), Pelotas, Rio Grande do Sul, Brazil.
| | - Magna Fabrícia Brasil Savela
- Center for Research, Teaching and Extension in Animal Science (NUPEEC), Federal University of Pelotas (UFPEL), Pelotas, Rio Grande do Sul, Brazil
| | - Natália Machado Rahal
- Center for Research, Teaching and Extension in Animal Science (NUPEEC), Federal University of Pelotas (UFPEL), Pelotas, Rio Grande do Sul, Brazil
| | - Antônio Amaral Barbosa
- Center for Research, Teaching and Extension in Animal Science (NUPEEC), Federal University of Pelotas (UFPEL), Pelotas, Rio Grande do Sul, Brazil
| | - Diego Rodrigues Saraiva
- Center for Research, Teaching and Extension in Animal Science (NUPEEC), Federal University of Pelotas (UFPEL), Pelotas, Rio Grande do Sul, Brazil
| | - Francisco Augusto Burkert Del Pino
- Center for Research, Teaching and Extension in Animal Science (NUPEEC), Federal University of Pelotas (UFPEL), Pelotas, Rio Grande do Sul, Brazil
| | - Viviane Rohrig Rabassa
- Center for Research, Teaching and Extension in Animal Science (NUPEEC), Federal University of Pelotas (UFPEL), Pelotas, Rio Grande do Sul, Brazil
| | - Eliza Rossi Komninou
- Center for Research, Teaching and Extension in Animal Science (NUPEEC), Federal University of Pelotas (UFPEL), Pelotas, Rio Grande do Sul, Brazil
| | - Cássio Cassal Brauner
- Center for Research, Teaching and Extension in Animal Science (NUPEEC), Federal University of Pelotas (UFPEL), Pelotas, Rio Grande do Sul, Brazil
| | - Diego Langwinski
- Center for Research, Teaching and Extension in Animal Science (NUPEEC), Federal University of Pelotas (UFPEL), Pelotas, Rio Grande do Sul, Brazil
| | - Alexandre Souza
- Center for Research, Teaching and Extension in Animal Science (NUPEEC), Federal University of Pelotas (UFPEL), Pelotas, Rio Grande do Sul, Brazil
| | - Marcio Nunes Corrêa
- Center for Research, Teaching and Extension in Animal Science (NUPEEC), Federal University of Pelotas (UFPEL), Pelotas, Rio Grande do Sul, Brazil
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Triwutanon S, Rukkwamsuk T. Factors affecting first ovulation in postpartum dairy cows under tropical conditions: A review. Open Vet J 2023; 13:1536-1542. [PMID: 38292713 PMCID: PMC10824079 DOI: 10.5455/ovj.2023.v13.i12.3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2023] [Accepted: 11/30/2023] [Indexed: 02/01/2024] Open
Abstract
It is documented that the reproductive performance of postpartum dairy cows is influenced by both internal and external factors. One of the most important reproductive performance indices is the first ovulation postpartum. This review aimed to describe factors affecting first ovulation postpartum in dairy cows, particularly those raised under tropical climates. Negative energy balance and its consequences; metabolic disorders; uterine pathology; udder health; lameness; and heat stress are discussed for their potential effects on the first ovulation postpartum. Understanding the underlying mechanisms of those affecting factors would assist in justifying the treatment and prevention plans in order to optimize the reproductive performance of postpartum dairy cows.
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Affiliation(s)
- Supawit Triwutanon
- Faculty of Veterinary Medicine, Kasetsart University, Nakhon Pathom, Thailand
| | - Theera Rukkwamsuk
- Faculty of Veterinary Medicine, Kasetsart University, Nakhon Pathom, Thailand
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Yang H, Heirbaut S, Jing X, De Neve N, Vandaele L, Jeyanathan J, Fievez V. Susceptibility of dairy cows to subacute ruminal acidosis is reflected in both prepartum and postpartum bacteria as well as odd- and branched-chain fatty acids in feces. J Anim Sci Biotechnol 2022; 13:87. [PMID: 36195941 PMCID: PMC9533591 DOI: 10.1186/s40104-022-00738-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2022] [Accepted: 06/01/2022] [Indexed: 11/10/2022] Open
Abstract
Background The transition period is a challenging period for high-producing dairy cattle. Cows in early lactation are considered as a group at risk of subacute ruminal acidosis (SARA). Variability in SARA susceptibility in early lactation is hypothesized to be reflected in fecal characteristics such as fecal pH, dry matter content, volatile and odd- and branched-chain fatty acids (VFA and OBCFA, respectively), as well as fecal microbiota. This was investigated with 38 periparturient dairy cows, which were classified into four groups differing in median and mean time of reticular pH below 6 as well as area under the curve of pH below 6. Furthermore, we investigated whether fecal differences were already obvious during a period prior to the SARA risk (prepartum). Results Variation in reticular pH during a 3-week postpartum period was not associated with differences in fecal pH and VFA concentration. In the postpartum period, the copy number of fecal bacteria and methanogens of unsusceptible (UN) cows was higher than moderately susceptible (MS) or susceptible (SU) cows, while the genera Ruminococcus and Prevotellacea_UCG-001 were proportionally less abundant in UN compared with SU cows. Nevertheless, only a minor reduction was observed in iso-BCFA proportions in fecal fatty acids of SU cows, particularly iso-C15:0 and iso-C16:0, compared with UN cows. Consistent with the bacterial changes postpartum, the lower abundance of Ruminococcus was already observed in the prepartum fecal bacterial communities of UN cows, whereas Lachnospiraceae_UCG-001 was increased. Nevertheless, no differences were observed in the prepartum fecal VFA or OBCFA profiles among the groups. Prepartum fecal bacterial communities of cows were clustered into two distinct clusters with 70% of the SU cows belonging to cluster 1, in which they represented 60% of the animals. Conclusions Inter-animal variation in postpartum SARA susceptibility was reflected in post- and prepartum fecal bacterial communities. Differences in prepartum fecal bacterial communities could alert for susceptibility to develop SARA postpartum. Our results generated knowledge on the association between fecal bacteria and SARA development which could be further explored in a prevention strategy. Graphical abstract ![]()
Supplementary Information The online version contains supplementary material available at 10.1186/s40104-022-00738-8.
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Affiliation(s)
- Hong Yang
- Laboratory for Animal Nutrition and Animal Product Quality, Department of Animal Sciences and Aquatic Ecology, Faculty of Bioscience Engineering, Ghent University, Campus Coupure, building F, 1st floor, Coupure Links 653, 9000, Ghent, Belgium
| | - Stijn Heirbaut
- Laboratory for Animal Nutrition and Animal Product Quality, Department of Animal Sciences and Aquatic Ecology, Faculty of Bioscience Engineering, Ghent University, Campus Coupure, building F, 1st floor, Coupure Links 653, 9000, Ghent, Belgium
| | - Xiaoping Jing
- Laboratory for Animal Nutrition and Animal Product Quality, Department of Animal Sciences and Aquatic Ecology, Faculty of Bioscience Engineering, Ghent University, Campus Coupure, building F, 1st floor, Coupure Links 653, 9000, Ghent, Belgium.,State Key Laboratory of Grassland and Agro-Ecosystems, International Centre for Tibetan Plateau Ecosystem Management, School of Life Sciences, Lanzhou University, Lanzhou, 730000, China
| | - Nympha De Neve
- Laboratory for Animal Nutrition and Animal Product Quality, Department of Animal Sciences and Aquatic Ecology, Faculty of Bioscience Engineering, Ghent University, Campus Coupure, building F, 1st floor, Coupure Links 653, 9000, Ghent, Belgium
| | - Leen Vandaele
- Animal Sciences Unit, Flanders Research Institute for Agriculture, Fisheries and Food, Scheldeweg 68, 9090, Melle, Belgium
| | - Jeyamalar Jeyanathan
- Laboratory for Animal Nutrition and Animal Product Quality, Department of Animal Sciences and Aquatic Ecology, Faculty of Bioscience Engineering, Ghent University, Campus Coupure, building F, 1st floor, Coupure Links 653, 9000, Ghent, Belgium
| | - Veerle Fievez
- Laboratory for Animal Nutrition and Animal Product Quality, Department of Animal Sciences and Aquatic Ecology, Faculty of Bioscience Engineering, Ghent University, Campus Coupure, building F, 1st floor, Coupure Links 653, 9000, Ghent, Belgium.
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Plaizier JC, Mulligan FJ, Neville EW, Guan LL, Steele MA, Penner GB. Invited review: Effect of subacute ruminal acidosis on gut health of dairy cows. J Dairy Sci 2022; 105:7141-7160. [PMID: 35879171 DOI: 10.3168/jds.2022-21960] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Accepted: 05/03/2022] [Indexed: 11/19/2022]
Abstract
Subacute ruminal acidosis (SARA) is assumed to be a common disease in high-yielding dairy cows. Despite this, the epidemiological evidence is limited by the lack of survey data. The prevalence of SARA has mainly been determined by measuring the pH of ruminal fluid collected using rumenocentesis. This may not be sufficiently accurate, because the symptoms of SARA are not solely due to ruminal pH depression, and ruminal pH varies among sites in the rumen, throughout a 24-h period, and among days. The impact of SARA has mainly been studied by conducting SARA challenges in cows, sheep, and goats based on a combination of feed restriction and high-grain feeding. The methodologies of these challenges vary considerably among studies. Variations include differences in the duration and amount of grain feeding, type of grain, amount and duration of feed restriction, number of experimental cows, and sensitivity of cows to SARA challenges. Grain-based SARA challenges affect gut health. These effects include depressing the pH in, and increasing the toxin content of, digesta. They also include altering the taxonomic composition of microbiota, reducing the functionality of the epithelia throughout the gastrointestinal tract (GIT), and a moderate inflammatory response. The effects on the epithelia include a reduction in its barrier function. Effects on microbiota include reductions in their richness and diversity, which may reduce their functionality and reflect dysbiosis. Changes in the taxonomic composition of gut microbiota throughout the GIT are evident at the phylum level, but less evident and more variable at the genus level. Effects at the phylum level include an increase in the Firmicutes to Bacteroidetes ratio. More studies on the effects of a SARA challenge on the functionality of gut microbiota are needed. The inflammatory response resulting from grain-based SARA challenges is innate and moderate and mainly consists of an acute phase response. This response is likely a combination of systemic inflammation and inflammation of the epithelia of the GIT. The systemic inflammation is assumed to be caused by translocation of immunogenic compounds, including bacterial endotoxins and bioamines, through the epithelia into the interior circulation. This translocation is increased by the increase in concentrations of toxins in digesta and a reduction of the barrier function of epithelia. Severe SARA can cause rumenitis, but moderate SARA may activate an immune response in the epithelia of the GIT. Cows grazing highly fermentable pastures with high sugar contents can also have a low ruminal pH indicative of SARA. This is not accompanied by an inflammatory response but may affect milk production and gut microbiota. Grain-based SARA affects several aspects of gut health, but SARA resulting from grazing high-digestible pastures and insufficient coarse fiber less so. We need to determine which method for inducing SARA is the most representative of on-farm conditions.
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Affiliation(s)
- J C Plaizier
- Department of Animal Science, University of Manitoba, Winnipeg, MB, Canada R3T 2N2.
| | - F J Mulligan
- School of Veterinary Medicine, University College Dublin, Belfield, Dublin 4, Ireland D04 V1W8
| | - E W Neville
- Celtic Sea Minerals Ltd., Strandfarm, Carrigaline, Co. Cork, Ireland P43 NN62
| | - L L Guan
- Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, AB, Canada T6G 2R2
| | - M A Steele
- Department of Animal Biosciences, University of Guelph, Guelph, ON, Canada N1G 2W1
| | - G B Penner
- Department of Animal and Poultry Science, University of Saskatchewan, Saskatoon, SK, Canada S7N 5B5
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Yang H, Heirbaut S, Jeyanathan J, Jing X, De Neve N, Vandaele L, Fievez V. Subacute ruminal acidosis phenotypes in periparturient dairy cows differ in ruminal and salivary bacteria and in the in vitro fermentative activity of their ruminal microbiota. J Dairy Sci 2022; 105:3969-3987. [DOI: 10.3168/jds.2021-21115] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Accepted: 01/04/2022] [Indexed: 01/04/2023]
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Song Y, Jiang S, Li C, Loor JJ, Jiang Q, Yang Y, Feng X, Liu S, He J, Wang K, Li Y, Zhang C, Du X, Wang Z, Li X, Liu G. Free fatty acids promote degranulation of azurophil granules in neutrophils by inducing production of NADPH oxidase-derived reactive oxygen species in cows with subclinical ketosis. J Dairy Sci 2022; 105:2473-2486. [PMID: 34998570 DOI: 10.3168/jds.2021-21089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Accepted: 12/06/2021] [Indexed: 11/19/2022]
Abstract
Subclinical ketosis (SCK) in dairy cows, a common metabolic disorder during the peripartal period, is accompanied by systemic inflammation. Excessive release of azurophil granule (AG) contents during degranulation of polymorphonuclear neutrophils (PMN) could contribute to systemic inflammation in SCK cows. Although the increase in blood free fatty acids (FFA) in SCK cows may promote AG degranulation from PMN, the underlying mechanisms are unclear. Thirty multiparous cows (within 3 wk postpartum) with similar lactation numbers (median = 3, range = 2-4) and days in milk (median = 6, range = 3-15) were classified based on serum β-hydroxybutyrate (BHB) level as control (n = 15, BHB < 0.6 mM) or SCK (n = 15, 1.2 mM < BHB < 3.0 mM). Cows with SCK had greater levels of serum haptoglobin, serum amyloid A, IL-1β, IL-6, IL-8 and tumor necrosis factor-α. These proinflammatory factors had strong positive correlations with myeloperoxidase (MPO), a marker protein of PMN AG, whose content was greater in the serum of SCK cows. Both the number of AG and the protein abundance of MPO were lower in PMN isolated from SCK cows. Additionally, we found a greater ratio of blood CH138A+/CD63high cells and greater mean fluorescence intensity of CD63 on the PMN membrane, further confirming the greater degree of AG degranulation in cows with SCK. In vitro FFA dose response (0, 0.3, 0.6, 1.2, and 2.4 mM for 4 h) and time course (0, 0.5, 1, 2, and 4 h with 0.6 mM) experiments were performed on PMN isolated from control cows. The increase in MPO content in extracellular supernatant resulting from those experiments led to the selection of 0.6 mM FFA for 1 h duration as conditions for subsequent studies. After FFA treatment, release of intracellular MPO was increased along with increased levels of CD63 mean fluorescence intensity on the PMN membrane, confirming that FFA promoted degranulation of AG. In addition, FFA treatment increased reactive oxygen species (ROS) production by PMN, an effect that was attenuated by incubation with diphenyleneiodonium chloride (DPI), a NADPH oxidase-derived ROS inhibitor. The mitochondrial-derived ROS inhibitor carbonyl cyanide 4-(trifluoromethoxy) phenylhydrazone (FCCP) did not affect ROS in response to FFA treatment. Treatment with FFA increased p47 phosphorylation and mRNA abundance of NCF1, NCF2, and CYBB in PMN. Furthermore, DPI, but not FCCP, dampened the degranulation of PMN AG induced by FFA in vitro. These data suggested that the degranulation of AG in PMN induced by FFA was mediated by NADPH oxidase-derived ROS. As verified ex vivo, PMN from SCK cows had greater levels of ROS, phosphorylation of p47, and mRNA abundance of NCF1, NCF2, and CYBB. Overall, the present study revealed that high blood concentrations of FFA in SCK cows induce the production of NADPH oxidase-derived ROS, thereby promoting degranulation of AG in PMN. The stimulatory effect of FFA on the release of AG content during degranulation, especially MPO, provides a new insight into the systemic inflammation experienced by peripartal cows with SCK.
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Affiliation(s)
- Yuxiang Song
- Key Laboratory of Zoonosis, Ministry of Education, College of Veterinary Medicine, Jilin University, Changchun, Jilin Province, 130062 China
| | - Shang Jiang
- Key Laboratory of Zoonosis, Ministry of Education, College of Veterinary Medicine, Jilin University, Changchun, Jilin Province, 130062 China
| | - Congyi Li
- Key Laboratory of Zoonosis, Ministry of Education, College of Veterinary Medicine, Jilin University, Changchun, Jilin Province, 130062 China
| | - Juan J Loor
- Mammalian NutriPhysioGenomics, Department of Animal Sciences, Division of Nutritional Sciences, University of Illinois, Urbana 61801
| | - Qianming Jiang
- Mammalian NutriPhysioGenomics, Department of Animal Sciences, Division of Nutritional Sciences, University of Illinois, Urbana 61801
| | - Yuchen Yang
- Key Laboratory of Zoonosis, Ministry of Education, College of Veterinary Medicine, Jilin University, Changchun, Jilin Province, 130062 China
| | - Xiancheng Feng
- Key Laboratory of Zoonosis, Ministry of Education, College of Veterinary Medicine, Jilin University, Changchun, Jilin Province, 130062 China
| | - Siyuan Liu
- Key Laboratory of Zoonosis, Ministry of Education, College of Veterinary Medicine, Jilin University, Changchun, Jilin Province, 130062 China
| | - Jiyuan He
- Key Laboratory of Zoonosis, Ministry of Education, College of Veterinary Medicine, Jilin University, Changchun, Jilin Province, 130062 China
| | - Kexin Wang
- Key Laboratory of Zoonosis, Ministry of Education, College of Veterinary Medicine, Jilin University, Changchun, Jilin Province, 130062 China
| | - Yunfei Li
- Key Laboratory of Zoonosis, Ministry of Education, College of Veterinary Medicine, Jilin University, Changchun, Jilin Province, 130062 China
| | - Cai Zhang
- College of Animal Science and Technology, Henan University of Science and Technology, Luoyang, 471003 China
| | - Xiliang Du
- Key Laboratory of Zoonosis, Ministry of Education, College of Veterinary Medicine, Jilin University, Changchun, Jilin Province, 130062 China
| | - Zhe Wang
- Key Laboratory of Zoonosis, Ministry of Education, College of Veterinary Medicine, Jilin University, Changchun, Jilin Province, 130062 China
| | - Xinwei Li
- Key Laboratory of Zoonosis, Ministry of Education, College of Veterinary Medicine, Jilin University, Changchun, Jilin Province, 130062 China
| | - Guowen Liu
- Key Laboratory of Zoonosis, Ministry of Education, College of Veterinary Medicine, Jilin University, Changchun, Jilin Province, 130062 China.
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Global prevalence of subclinical ketosis in dairy cows: A systematic review and meta-analysis. Res Vet Sci 2022; 144:66-76. [DOI: 10.1016/j.rvsc.2022.01.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2021] [Revised: 12/14/2021] [Accepted: 01/05/2022] [Indexed: 11/22/2022]
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Vidmar M, Hodnik JJ, Starič J. Review of guidelines for functional claw trimming and therapeutic approach to claw horn lesions in cattle. Trop Anim Health Prod 2021; 53:476. [PMID: 34553277 DOI: 10.1007/s11250-021-02924-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Accepted: 09/10/2021] [Indexed: 11/30/2022]
Abstract
Lameness is one of the most pressing health and welfare problems in cattle, especially on dairy farms. The most common cause of lameness is claw pathology, often due to lack of appropriate functional claw trimming. Functional claw trimming restores the physiological shape of the claws and distributes weight properly between the claws and over the claw weight-bearing surface. It also allows closer examination of the claws for early signs of pathology. The methods of functional claw trimming described in the previous century are still applicable today, considering some recent findings on the subject. It is essential not to over-trim the claws and to maintain strict hygiene of the trimming tools. Claw horn pathology in the early stages is usually treated effectively by therapeutic claw trimming alone. The stoic nature of cattle and their natural tendency to hide pain often result in delayed treatment of claw diseases, leading to more advanced stages of disease/pathology associated with higher-grade lameness. This situation often leads to the development of neuropathic pain and hyperalgesia requiring multimodal treatment. Because claw horn diseases are multifactorial, veterinarians and others involved in animal management must be familiar with the preventive measures available to improve claw health in a cattle herd. Further research to improve claw horn quality and effectively control/prevent claw infections without polluting the environment or negatively affecting worker and animal health is still needed. This article reviews the latest knowledge on functional claw trimming and treatment of the most common claw horn diseases in cattle.
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Affiliation(s)
- M Vidmar
- University of Ljubljana, Veterinary faculty, Ljubljana, Slovenia
| | - J J Hodnik
- University of Ljubljana, Veterinary faculty, Ljubljana, Slovenia
| | - J Starič
- University of Ljubljana, Veterinary faculty, Ljubljana, Slovenia.
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Vallejo-Timaran DA, Arango-Sabogal JC, Reyes-Vélez J, Maldonado-Estrada JG. Postpartum uterine diseases negatively impact the time to pregnancy in grazing dairy cows from high-altitude tropical herds. Prev Vet Med 2020; 185:105202. [PMID: 33186880 DOI: 10.1016/j.prevetmed.2020.105202] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Revised: 09/22/2020] [Accepted: 11/01/2020] [Indexed: 12/29/2022]
Abstract
Infertility is a common consequence of cows suffering from postpartum uterine diseases. Diseases from a uterine origin in early lactation affect both uterine and ovarian tissues decreasing the probability of pregnancy. The objective of the present study was to determine the impact of clinical metritis, clinical endometritis, and subclinical endometritis on days open in cows from high-altitude tropical dairy herds. A single cohort longitudinal study was conducted from January 2018 to February 2019, which included 248 cows enrolled from five commercial high-altitude tropical dairy herds in the northern region of the Department of Antioquia, Colombia. A directed acyclic graph was used to identify minimal sufficient adjustment sets for each exposure variable of interest. Based on the directed acyclic graph, three models (one for each of clinical metritis, clinical endometritis, and subclinical endometritis) were proposed to assess the impact of postpartum uterine diseases on days open. The time at risk was defined as the days elapsed from calving until pregnancy (event or censure). Observations were right-censored if cows were either culled, dead, were lost to follow up, suffered a systemic illness that required the use of parenteral drugs, or if they were not pregnant at 210 postpartum days. Three Cox proportional hazards models were proposed to estimate the Hazard Ratios (HR) at any point in the follow-up period for each exposure variable. The hazard of pregnancy was significantly lower for cows with metritis (40 %; HR = 0.60; 95 % CI: 0.43 - 0.86), clinical endometritis (69 %; HR = 0.31; 95 % CI: 0.22 - 0.45), and subclinical endometritis (76 %; HR = 0.24; 95 % CI: 0.16 - 0.36) compared to their herd mates without these conditions. These results provide evidence of the negative impact of postpartum uterine diseases on time to pregnancy in grazing lactating dairy cows from high-altitude tropical herds.
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Affiliation(s)
- D A Vallejo-Timaran
- Veterinary Medicine School, Faculty of Agrarian Sciences, University of Antioquia. One Health Veterinary Research and Innovation - OHVRI Group. Calle 70 No. 52-21, Medellín, Colombia.
| | - J C Arango-Sabogal
- Veterinary Medicine School, Faculty of Agrarian Sciences, University of Antioquia. One Health Veterinary Research and Innovation - OHVRI Group. Calle 70 No. 52-21, Medellín, Colombia
| | - J Reyes-Vélez
- Biogenesis Research Group, Faculty of Agricultural Sciences, University of Antioquia, Calle 70 No. 52-21. 050010 Medellin, Colombia
| | - J G Maldonado-Estrada
- Veterinary Medicine School, Faculty of Agrarian Sciences, University of Antioquia. One Health Veterinary Research and Innovation - OHVRI Group. Calle 70 No. 52-21, Medellín, Colombia
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