Cow-related factors associated with intramammary infections during the 1st week postpartum in primiparous dairy cows in certified organic herds

Fernandes, Leticia; Celestino, M.L.; Menta, P.R.; Silva, T H; Paiva, D; Ribeiro, Thiago Lauro Maia; Caixeta, Luciano; Noyes, Noelle; Machado, V.S.

doi:10.1016/j.tvjl.2022.105822

Cited by 4 publications

(3 citation statements)

References 32 publications

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“…All the above limits our ability to determine if colonization of NASM with antimicrobial activity preceded the acquisition of SAU or SSLO IMI. Therefore, it is conceivable that other factors not explored in this study, such as the presence of a close-up pen with poor bedding management, high stocking density, high fly presence, and presence of IMI carried across lactations for multiparous cows, may be influencing the results and explaining why some of these animals calved with IMI (Green et al, 2008; De Vliegher et al, 2012; Fernandes et al, 2022).…”

Section: Discussionmentioning

confidence: 99%

“…Nonetheless, it is vital to understand that some of our results could be still biased by other unmeasured confounders. For instance, cow-level factors that increased the likelihood of presence of IMI such as abnormally high or low body condition score, milk leakage (Fernandes et al, 2022), dysfunctional immune response (Sordillo, 2018), or dirty udders (Schreiner and Ruegg, 2003; Compton et al, 2007) could have influenced our results. Moreover, the small sample size and resulting imprecision of estimates could hinder our ability to make inference from the results in this exploratory study.…”

Section: Discussionmentioning

confidence: 99%

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In vitroantimicrobial activity of non-aureus StaphylococciandMammaliicocciagainstStaphylococcus aureusandStreptococcus uberisand their relationship with the presence of intramammary infections in organic dairy cows

Peña-Mosca,

Gaire,

Dean

et al. 2024

Preprint

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This study aimed to: (1) Assess thein vitroantimicrobial activity of non-aureusStaphylococciandMammaliicocci(NASM) isolates from organic cows teat apices with and without intramammary infections (IMI) byStaphylococcus aureus(SAU) orStreptococcusspp. andStreptococcus-like organisms (SSLO); (2) Investigate the relationship between IMI status and NASM counts on teat apex; (3) Explore the relationship between NASM species taxonomy and the inhibitory activity against SAU andStreptococcus uberis(SUB). A total of 114 cows from 2 farms were sampled and followed from 8 weeks before to 5 weeks after calving. Weekly milk samples were cultured and used to design a case control study. Cases were defined as cows that had an IMI by SAU or SSLO, and controls were randomly chosen from cows without an IMI by these microorganisms. One teat apex sample from the week prior to IMI diagnosis was aerobically cultured. Taxonomy of recovered isolates was confirmed using mass spectrometry and whole genome sequencing. The inhibitory activity against SAU and SUB was investigated using agar dilution methods. Isolates were ranked based on in vitro inhibitory activity against SAU and SUB and categorized as "top 10" with the lowest minimum inhibitory concentration or not. The presence of NASM isolates classified as "top 10" against SAU was highest in controls (19.4%) compared to cases (5.8%). No difference in NASM counts on teat apex was observed between cases and controls. The inhibitory activity varied across NASM, withStaphylococcus succinusshowing the highest inhibitory activity against both SAU and SUB.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

In vitroantimicrobial activity of non-aureus StaphylococciandMammaliicocciagainstStaphylococcus aureusandStreptococcus uberisand their relationship with the presence of intramammary infections in organic dairy cows

Peña-Mosca,

Gaire,

Dean

et al. 2024

Preprint

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“…Other studies conclude that cows must gain a certain body condition during the dry period (near calving) to maintain the physiological processes that preserve energy balance and performance, and thus decrease the probability of presenting SCM [ 53 ]. In contrast to low body condition, it has been reported in cows from organic ecological herds that arrived 6 weeks prior to calving with body condition ≥3.75, had a 3.12 higher probability of intramammary infection ( p < 0.01) [ 54 ].…”

Section: Discussionmentioning

confidence: 99%

Breed and non-genetic risk factors associated with the prevalence of subclinical mastitis in livestock systems of Arauca, Colombian orinoquia

Salamanca-Carreño,

Vélez-Terranova,

Barajas-Pardo

et al. 2024

International Journal of Veterinary Science and Medicine

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Subclinical Mastitis (SCM) is caused by several factors associated with the interaction of the individual cow, cow management, and the environment. The aim of this study was to assess the breed and non-genetic risk factors on the prevalence of SCM in cows from the dual-purpose livestock system on the floodplain of Arauca, Colombian Orinoquia. Milk samples were taken from the individual mammary quarters of 481 cows representing 28 different farms where the electrical conductivity (EC) test applied. To determine the factors associated with SCM, a multiple logistic regression analysis was used. The response variable was the SCM presence (1), or absence (0) obtained with the EC test. Breed was included as a genetic risk factor, and as non- genetic risk factors: number of cows in production, daily milk production, lactation month, cow age, climatic period, body condition, and calving number. The factors that were significantly associated with the SCM presence were body condition, climatic period, and breed ( p < 0.05). Odds ratio (OR) analysis of significant effects indicates that for each unit increase in body condition, the OR of having animals with SCM is reduced by 71%. In the dry period the OR of animals with SCM increases by 150% compared to the rainy period. Composite breeds reduce the OR of SCM animals by 73%, compared with Indicus -predominance animals. In this study, the occurrence of SCM in extensive management systems in Arauca, Colombian Orinoquia, is determined by the risk factors of breed, climatic period, and body condition.

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Intramammary infections and risk factors in freshly calved heifers in Swedish dairy herds

Waller

Lundberg²,

Börjesson

et al. 2023

Journal of Dairy Science

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Cow-related factors associated with intramammary infections during the 1st week postpartum in primiparous dairy cows in certified organic herds

Cited by 4 publications

References 32 publications

In vitroantimicrobial activity of non-aureus StaphylococciandMammaliicocciagainstStaphylococcus aureusandStreptococcus uberisand their relationship with the presence of intramammary infections in organic dairy cows

In vitroantimicrobial activity of non-aureus StaphylococciandMammaliicocciagainstStaphylococcus aureusandStreptococcus uberisand their relationship with the presence of intramammary infections in organic dairy cows

Breed and non-genetic risk factors associated with the prevalence of subclinical mastitis in livestock systems of Arauca, Colombian orinoquia

Intramammary infections and risk factors in freshly calved heifers in Swedish dairy herds

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