Review of the bacterial composition of healthy milk, mastitis milk and colostrum in small ruminants

Toquet, Marion; Gómez-Martín, Ángel; Bataller, Esther

doi:10.1016/j.rvsc.2021.07.022

Cited by 16 publications

(22 citation statements)

References 40 publications

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“…Moreover, the total bacterial count and Enterobacteriaceae and Staphylococcus sp. counts for stressed and control goats were within the normal ranges, as reported previously by other authors (Muehlherr et al, 2003;Toquet et al, 2021). In our study, the adequate microbiological quality of goat milk can be explained by the hygiene of the experimental milking and the low mastitis rate on the experimental farm.…”

Section: Table 2 Effect Of Treatment (T) Sampling Hour (H) and Their ...supporting

confidence: 91%

“…In our study, the adequate microbiological quality of goat milk can be explained by the hygiene of the experimental milking and the low mastitis rate on the experimental farm. In fact, inadequate hygiene conditions during milking cause an increase in the bacterial count in milk, with a high prevalence of Staphylococcus sp., because it is the main bacteria related to clinical mastitis in goats (Muehlherr et al, 2003;Toquet et al, 2021). These data are important and reinforce the argument that cumulative stress caused by different acute stressors increased cellular apoptosis in the mammary gland, increased SCC and compromised milk production without changing the mastitis rate in experimental goats.…”

Section: Table 2 Effect Of Treatment (T) Sampling Hour (H) and Their ...supporting

confidence: 61%

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Cumulative effect of different acute stressors on physiological and hormonal responses and milk yield in lactating Saanen goats

Vasconcelos

Silva²,

Merighe³

et al. 2022

Semina: Ciênc. Agrár.

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This study addresses the hypothesis that acute stress can cumulatively cause a decrease in milk yield in Saanen goats. In fact, dairy animals are subject to several environmental and management challenges that may cause acute stress during the same lactation. However, the cumulative effect of acute stress on milk yield remains unclear. Thus, the objective of this study was to evaluate the effects of different acute stressors on milk yield and milk quality in goats. Thirty Saanen goats were either maintained on their usual routine and comfort conditions (control group) or subjected to different environmental stressors (heat stress, adrenocorticotropic hormone [ACTH] administration, hoof care, and rain). These stressful challenges were performed sequentially, one challenge per day, on four consecutive days to evaluate the influence of the challenge on milk yield and milk quality. The acute stress imposed on goats caused significant changes in respiratory rate, rectal temperature, cortisol, insulin, triiodothyronine, insulin-like growth factor 1, and glucose concentrations when compared to the control group. Although these acutestress-triggered physiological responses are fundamental to restoring homeostasis, the cumulative effects of different imposed challenges caused a change in hormone release, an increase in somatic cell count (SCC), and a decrease in milk yield. In this context, the results of this study indicate that farmers should avoid concurrently subjecting goats to management and environmental challenges that can induce acute stress because these stressors have a negative and cumulative impact on SCC and milk yield.

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Section: Table 2 Effect Of Treatment (T) Sampling Hour (H) and Their ...supporting

confidence: 91%

Section: Table 2 Effect Of Treatment (T) Sampling Hour (H) and Their ...supporting

confidence: 61%

Cumulative effect of different acute stressors on physiological and hormonal responses and milk yield in lactating Saanen goats

Vasconcelos

Silva²,

Merighe³

et al. 2022

Semina: Ciênc. Agrár.

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“…In general, when performing the interpretation of the results obtained after the microbiological analysis of samples, some important aspects need to be taken into account, such as the milk microbiota and the role of commensal and opportunistic bacteria in the udder because, for instance, species that can be isolated from the milk of healthy animals [ 80 ] can also be involved in the etiology as mastitis [ 11 ], as is the case in Staphylococcus epidermidis [ 80 ].…”

Section: Discussionmentioning

confidence: 99%

Milk Pathogens in Correlation with Inflammatory, Oxidative and Nitrosative Stress Markers in Goat Subclinical Mastitis

Novac

Nadăş

Matei

et al. 2022

Animals

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Goat mastitis is still frequently diagnosed in dairy farms, with serious consequences on milk quality and composition. The aim of this study was to establish correlations between milk microorganisms and biochemical parameters in goats with no signs of clinical mastitis. Thus, 76 milk samples were collected from a dairy goat farm, Carpathian breed, followed by microbiological, molecular (16S rRNA sequencing) and somatic cells analysis, determination of lactate dehydrogenase (LDH), β-glucuronidase, catalase (CAT), glutathione peroxidase (GPx) activity, total antioxidant capacity (TAC), nitric oxide (NO) and lipid peroxides (LPO) using spectrophotometry and the ELISA method for 8-hydroxy-deoxyguanosine (8-OHdG) as the oxidative DNA damage indicator. Samples positive for bacterial growth showed a significant (p < 0.05) increase in the number of somatic cells, LDH and β-glucuronidase activity, as well as higher levels of CAT, GPx, NO, LPO and 8-OHdG compared with pathogen-free milk whereas TAC was lower in milk from an infected udder. These findings suggest that subclinical mastitis is associated with increased enzymatic activity and induction of oxidative stress. Nevertheless, changes in biochemical parameters tended to vary depending on the pathogen, the most notable mean values being observed overall in milk positive for Staphylococcus aureus.

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“…Mastitis, which is mainly caused by pathogenic infection, can result in impaired mammary function and bacteriological changes in milk (1). In humans, mastitis mostly occurs in lactating women, seriously affecting their quality of life, breastfeeding capability, and newborn health, and also posing a burden on the healthcare system (2,3).…”

Section: Introductionmentioning

confidence: 99%

Houttuynia Essential Oil and its Self-Microemulsion Preparation Protect Against LPS-Induced Murine Mastitis by Restoring the Blood–Milk Barrier and Inhibiting Inflammation

et al. 2022

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Mastitis is a common inflammatory disease caused by bacterial infection to the mammary gland that impacts human and animal health and causes economic losses. Houttuynia essential oil (HEO), extracted from Houttuynia cordata Thunb, exhibits excellent antibacterial and anti-inflammatory properties. The aim of the study was to investigate the effects of HEO and a self-microemulsion preparation of HEO (SME-HEO) on inflammation and the blood–milk barrier (BMB) in lipopolysaccharide-induced murine mastitis. HEO and SME-HEO significantly downregulated pro-inflammatory factors TNF-α and IL-1β, upregulated anti-inflammatory factor IL-10, inhibited MPO expression, and alleviated histopathological injury in murine mammary gland tissues. Additionally, HEO and SME-HEO protected the integrity of the BMB by upregulating the expression of junction proteins ZO-1, claudin-1, claudin-3, and occludin. The anti-inflammatory effect of HEO against murine mastitis was mediated by blocking the MAPK signaling pathway and expression of iNOS. By inhibiting the release of inflammatory factors and protecting the integrity of the BMB, HEO may provide a novel treatment for mastitis.

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Review of the bacterial composition of healthy milk, mastitis milk and colostrum in small ruminants

Cited by 16 publications

References 40 publications

Cumulative effect of different acute stressors on physiological and hormonal responses and milk yield in lactating Saanen goats

Cumulative effect of different acute stressors on physiological and hormonal responses and milk yield in lactating Saanen goats

Milk Pathogens in Correlation with Inflammatory, Oxidative and Nitrosative Stress Markers in Goat Subclinical Mastitis

Houttuynia Essential Oil and its Self-Microemulsion Preparation Protect Against LPS-Induced Murine Mastitis by Restoring the Blood–Milk Barrier and Inhibiting Inflammation

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