Peer-reviewed veterinary case report
Intramammary IL-8 injection effects on milk cells and bacteria
By Takahashi, H et al.·Published in Journal of veterinary medicine. B, Infectious diseases and veterinary public health·2005·Department of Production Animal Diseases, Japan·View original on PubMed →
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Original publication title: Effect of intramammary injection of RbIL-8 on milk levels of somatic cell count, chemiluminescence activity and shedding patterns of total bacteria and S. aureus in Holstein cows with naturally infected-subclinical mastitis.
- Species:
- cattle
Plain-English summary
A group of 10 Holstein cows with subclinical mastitis (a type of udder infection) were treated with an injection of a substance called recombinant bovine interleukin-8 (rbIL-8) to see if it could help reduce infection levels. In cows with early-stage mastitis, the treatment successfully lowered the number of bacteria and improved milk quality within a week. However, in cows with late-stage mastitis, the treatment did not show the same effectiveness. This suggests that rbIL-8 could be a helpful treatment for early infections but may not work as well for more advanced cases.
People also search for: cow mastitis treatment · Holstein cow udder infection · rbIL-8 for mastitis
Abstract
Summary The effect of intramammary injection of recombinant bovine interleukin-8 (rbIL-8, 1 mg/10 ml of saline) on quarter milk levels of somatic cell count (SCC), chemiluminescence (CL) activity and counts of total bacteria and Staphylococcus aureus (S. aureus) was investigated, using 10 Holstein cows with an early stage or a late stage of subclinical mastitis naturally infected with S. aureus. In the late-stage group, milk SCC and CL activity had significant rises with maximum levels at 6 h, following maintained high levels thereafter post-cytokine injection. The counts in milk total bacteria and S. aureus were insignificantly decreased, being increased back on day 7 post-cytokine injection. Thus, the cytokine was inefficient for the late-stage subclinical mastitis. However, in the early-stage group milk SCC and CL activity declined to under pre-injection levels on day 7 after marked and significant rises at 6 h and day 1 post-cytokine injection. The milk total bacterial count decreased significantly on days 0.25 and 2. Furthermore, the milk S. aureus count was decreased significantly on days 1, 2, 3 and 7 by the cytokine injection. These results suggest that the rbIL-8 has a potential as a therapeutic agent of the subclinical mastitis of dairy cows, if the cytokine is applied at an initial stage of infection.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/15702998/