Survival of Streptococcus uberis on bedding substrates

Sherwin, Ginny; Egan, Sharon A.; Green, Martin J.; Leigh, James A.

doi:10.1016/j.tvjl.2021.105731

Cited by 6 publications

(2 citation statements)

References 18 publications

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“…Our results showed that the most common cause of mastitis was S. uberis, which knowledge is even more important because of the environmental nature of this pathogen, however some S. uberis strains could show a contagious nature [37]. Improving the conditions in which cows are kept, including changing the flooring, the substrate, could play a significant role [38]. The prevalence of S. uberis mastitis shows that the dairy industry continues to face the challenge of combatting this pathogen despite the adoption of measures to control environmental pathogens [39].…”

Section: Discussionmentioning

confidence: 75%

Molecular and phenotypic identification of bacterial species isolated from cows with mastitis from three regions of Poland

Dobrut,

Siemińska,

Sroka-Oleksiak

et al. 2024

BMC Vet Res

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Background Bovine mastitis is a widespread disease affecting dairy cattle worldwide and it generates substantial losses for dairy farmers. Mastitis may be caused by bacteria, fungi or algae. The most common species isolated from infected milk are, among others, Streptococcus spp., Escherichia coli, Staphylococcus aureus and non-aureus staphylococci and mammaliicocci. The aim of this paper is to determine the frequency of occurrence of bacterial species in milk samples from cows with mastitis from three regions of Poland: the north-east, the south-west and the south. To this end 203 milk samples taken from cows with a clinical form (CM) of mastitis (n = 100) and healthy animals (n = 103) were examined, which included culture on an appropriate medium followed by molecular detection of E. coli, S. aureus, Streptococcus agalactiae and Streptococcus uberis, as one of the most common species isolated from mastitis milk. Results The results obtained indicated that S. uberis was the most commonly cultivated CM species (38%, n = 38), followed by S. aureus (22%, n = 22), E. coli (21%, n = 21) and S. agalactiae (18%, n = 18). Similar frequencies in molecular methods were obtained for S. uberis (35.1%) and S. aureus (28.0%). The variation of sensitivity of both methods may be responsible for the differences in the E. coli (41.0%, p = 0.002) and S. agalactiae (5.0%, p = 0.004) detection rates. Significant differences in composition of species between three regions of Poland were noted for E. coli incidence (p < 0.001), in both the culture and molecular methods, but data obtained by the PCR method indicated that this species was the least common in north-eastern Poland, while the culture method showed that in north-eastern Poland E. coli was the most common species. Significant differences for the molecular method were also observed for S. uberis (p < 0.001) and S. aureus (p < 0.001). Both species were most common in southern and south-western Poland. Conclusions The results obtained confirm the need to introduce rapid molecular tests for veterinary diagnostics, as well as providing important epidemiological data, to the best of our knowledge data on Polish cows in selected areas of Poland is lacking.

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Section: Discussionmentioning

confidence: 75%

Molecular and phenotypic identification of bacterial species isolated from cows with mastitis from three regions of Poland

Dobrut,

Siemińska,

Sroka-Oleksiak

et al. 2024

BMC Vet Res

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“…As one of the main objectives of CB management is to keep the composting process active by providing adequate conditions for microbial multiplication, bacterial counts in these systems are high [2], which can be a risk factor for udder health. Bedding material has been described as a primary source of bacterial contamination of the mammary gland [19], and different bedding materials were shown to support the growth of mastitis-causing pathogens [20,21]. In this sense, teat skin contamination and the risk of new intramammary infections can be influenced by the type and physical-chemical characteristics of the bedding material.…”

Section: Introductionmentioning

confidence: 99%

Association between Mastitis Occurrence in Dairy Cows and Bedding Characteristics of Compost-Bedded Pack Barns

et al. 2023

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Compost-bedded pack barns (CB) are receiving increasing attention as a housing system that can potentially improve the welfare of dairy cows. This study characterized the frequency and profile of pathogens isolated from clinical (CM) and subclinical (SCM) mastitis in dairy cows housed in CB. It evaluated the association between mastitis occurrence and bedding characteristics in CB systems. Over six months, seven dairy herds were visited monthly for milk and bedding sample collections. Milk samples from mastitis cases were submitted to microbiological identification by matrix-assisted laser desorption ionization-time of flight (MALDI-TOF MS). Bedding samples were submitted to physical-chemical (pH, organic matter, moisture, and carbon to nitrogen ratio) and microbiological counting (total bacterial counts, coliforms, streptococci, and staphylococci) analyses. Regression analysis was used to determine the association between mastitis occurrence and CB characteristics. Our results showed that Escherichia coli and environmental streptococci were the most frequently isolated pathogens from CM cases, while Staphylococcus chromogenes and contagious pathogens (Staphylococcus aureus and Streptococcus agalactiae) were the most commonly isolated from SCM cases. Bedding moisture content was positively associated with the incidence of CM. The bedding carbon to nitrogen ratio was negatively associated with the incidence of SCM, and the bedding total bacteria counts tended to be associated with the incidence of SCM. Bedding counts of coliforms positively associated with the prevalence of SCM. Our results can support decision-makers in the dairy industry seeking strategies for bedding management and mastitis control.

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Bacteriophages and Their Endolysin: An Alternative Therapeutic Approach for Bovine Mastitis

Kanwar,

Aslam,

Zulqurnain

et al. 2023

Biol Bull Rev

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Survival of Streptococcus uberis on bedding substrates

Cited by 6 publications

References 18 publications

Molecular and phenotypic identification of bacterial species isolated from cows with mastitis from three regions of Poland

Molecular and phenotypic identification of bacterial species isolated from cows with mastitis from three regions of Poland

Association between Mastitis Occurrence in Dairy Cows and Bedding Characteristics of Compost-Bedded Pack Barns

Bacteriophages and Their Endolysin: An Alternative Therapeutic Approach for Bovine Mastitis

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