Defects and bacterial pathogens in udders of non-dairy breed ewes from New Zealand

Ridler, Anne; Rout-Brown, Gabby; Flay, Kate J.; Velathanthiri, Niluka; Grinberg, Alex

doi:10.1080/00288233.2021.1905005

Cited by 8 publications

(3 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Veillonella parvula is not able to ferment carbohydrates and lives on the lactate produced by Streptococci [ 81 , 82 ], so it is reasonable to assume that this bacterium was rather isolated due to the isolation of the aforementioned Streptococci. Finally, the two Enterobacteriaceae species ( Enterobacter cloacae and Enterobacter kobei ), although pathogenic for the respiratory tract, are considered major pathogens for the mammary gland [ 83 , 84 ]. All these findings suggest a semi-protective effect of the dietary omega-3 fatty acids on bacterial populations in the udder.…”

Section: Discussionmentioning

confidence: 99%

Effects of Dietary Omega-3 Enrichment on the Chemical Composition and the Pathogenic Microbiota of Ovine Milk

Tzora

Voidarou

Giannenas

et al. 2022

Foods

View full text Add to dashboard Cite

The demand for ovine milk and ovine dairy products is constantly increasing due to their exceptional sensorial characteristics and their health benefits for consumers. However, dairy fat content and composition are of particular concern for consumers as well as the medical community, as there are risk factors for coronary disease, diabetes mellitus, cancer, and other serious diseases. For this reason, attempts have been made to control/regulate the fat composition of ovine milk by modifying sheep dietary intake of polyunsaturated fatty acids. In this experimental trial, a group of sheep were fed for 30 days a diet enriched in flaxseeds and lupines, feed ingredients rich in omega-3 fatty acids, aiming to investigate the effects on fat composition and the microbiota of ovine milk. Chemical analysis of the collected milk showed that the omega-3 and omega-6 content was increased. On the opposite, the atherogenic and thrombogenic indexes decreased. Of importance was the semi-protective effect on the udder by the increased omega-3 dietary intake, as depicted by its impact on the biodiversity of the pathogenic microbiota. These findings suggest that ovine milk could be modified under specific conditions to be more appropriate for the consumption by people belonging to high-risk groups for various diseases.

show abstract

Section: Discussionmentioning

confidence: 99%

Effects of Dietary Omega-3 Enrichment on the Chemical Composition and the Pathogenic Microbiota of Ovine Milk

Tzora

Voidarou

Giannenas

et al. 2022

Foods

View full text Add to dashboard Cite

show abstract

“…Udder defects and milk parameters were analysed both at the udder-half and whole-udder level. Udder defects are relatively common in ewes in New Zealand, with previous studies undertaken between weaning and mating reporting a 2.3-7% prevalence [3,19,21]. Recently, Griffiths, et al [18] studied palpable udder defects in Romney ewes at pre-mating, pre-lambing, docking (approximately four weeks post-lambing), and weaning and reported an occurrence of udder defects of 6.0, 5.0, 7.5, and 7.4%, respectively.…”

Section: Discussionmentioning

confidence: 99%

“…Globally, the prevalence of udder defects in non-dairy ewes ranges from 0 to 10.9% [2,[12][13][14][15][16]. The prevalence of udder defects in New Zealand is up to 7% [3,[17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Effect of Palpable Udder Defects on Milk Yield, Somatic Cell Count, and Milk Composition in Non-Dairy Ewes

Zeleke

Kenyon

Flay

et al. 2021

Animals

Self Cite

View full text Add to dashboard Cite

In non-dairy ewes, udder defects hinder the survival and weight gain of their pre-weaned lambs. The objectives of this study were to determine the effects of palpable udder defects on milk yield, somatic cell count (SCC), and milk composition in non-dairy Romney ewes. Ewes with a history of udder defects or normal udders were selected for the study. Of a total of 48 ewes that lambed, 30 ewes reared at least one lamb, and were milked six times, once weekly, for the first six weeks of lactation. Udder halves were palpated and scored at each milking event. Multivariate linear mixed models examined the impacts of udder defects on udder-half and whole-udder milk yield, SCC, and milk composition (fat, protein, lactose, total solids, and solids non-fat (SNF)). Across the six examinations, 24.7% of the total 352 udder-half examinations were observed to be defective. Udder halves that were defective at least once produced on average 57.9% less (p < 0.05) milk than normal udder halves, while normal udder halves with a contralateral defective half yielded 33.5% more (p < 0.05) milk than normal udder halves. Successive occurrence of both hard and lump udder defect categories in an udder-half, udder defect detection early in lactation, and a high frequency of udder defect detection were all associated with udder-half milk yield loss (p < 0.05). At the whole-udder level, no differences in milk yield (p > 0.05) were observed between those with one udder-half defective and both normal udder-halves. However, udders in which one udder half was categorised as hard but progressed to lump and remained as lump until 42 days of lactation produced less (p < 0.05) milk compared with normal udders. With the exception of SNF, there were no significant associations (p > 0.05) between milk composition parameters and udder defect. Overall, these findings emphasise the importance of udder health in non-dairy ewes and the potential effect of udder defects on their lambs.

show abstract

Animal science to meet today’s challenges

Schreurs

2022

New Zealand Journal of Agricultural Research

View full text Add to dashboard Cite

Defects and bacterial pathogens in udders of non-dairy breed ewes from New Zealand

Cited by 8 publications

References 11 publications

Effects of Dietary Omega-3 Enrichment on the Chemical Composition and the Pathogenic Microbiota of Ovine Milk

Effects of Dietary Omega-3 Enrichment on the Chemical Composition and the Pathogenic Microbiota of Ovine Milk

Effect of Palpable Udder Defects on Milk Yield, Somatic Cell Count, and Milk Composition in Non-Dairy Ewes

Animal science to meet today’s challenges

Contact Info

Product

Resources

About