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- Abrahmsén, Markus, et al.
(författare)
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Prevalence of subclinical mastitis in dairy farms in urban and peri-urban areas of Kampala, Uganda
- 2014
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Ingår i: Tropical Animal Health and Production. - : Springer Science and Business Media LLC. - 0049-4747 .- 1573-7438. ; 46, s. 99-105
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Tidskriftsartikel (refereegranskat)abstract
- It is widely recognized that subclinical mastitis (SCM) is an extensive problem in the dairy industry worldwide. It is of particular concern in developing countries. The aim of this study was to establish the prevalence of SCM in dairy cattle in the urban and peri-urban areas of Kampala, Uganda and to gain information about pathogens and antibiotic resistance patterns. The study was conducted as a field study in 18 smallholder dairy farms in peri-urban Kampala, Uganda. All cows at the farms were physically examined, and cows with signs of clinical mastitis were excluded. Cows (n = 195) were tested with California Mastitis Test (CMT), and udder quarters with CMT score a parts per thousand yen3 (scale 1-5) were milk sampled for bacteriological analysis. To allow further sub-analysis of the results, the stage of lactation, parity, milk production, production type, udder hygiene, and cow breed were recorded. Results indicate that 86.2 % (n = 168) of the tested cows had SCM in one or more quarters. The most common bacteriological outcome was infection with coagulase-negative staphylococci (54.7 %), followed by negative growth (24.9 %) and streptococci (16.2 %); all of which (n = 34) were sensitive to penicillin. Of the tested staphylococci (n = 17), the majority (58.9 %) were positive for penicillinase production. Factors with significant impact on the prevalence of SCM at cow level were the stage of lactation, parity, and production type. The results suggest that the prevalence of SCM in Uganda is substantially higher than reported in previous studies and in other comparable developing countries. This implies that SCM deserves more attention and that improvement in dairy cow husbandry in terms of hygiene and management is necessary.
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- Awasthi, H., et al.
(författare)
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Do Cytoplasmic Lipid Droplets Accumulate in Immature Oocytes from Over-Conditioned Repeat Breeder Dairy Heifers?
- 2010
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Ingår i: Reproduction in domestic animals. - : Wiley-Blackwell. - 0936-6768 .- 1439-0531. ; 45:5, s. E194-E198
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Tidskriftsartikel (refereegranskat)abstract
- One of the main sources of repeat breeding in dairy cattle, caused by fertilization failure or early embryonic death, is metabolic stress during lactation. Nutrition seems also to play a role when the condition is seen in heifers, where oocyte cytoplasmic maturation is impaired. To determine whether over conditioning affects oocyte morphology, immature oocytes were collected by ovum pick-up (OPU) twice weekly during 5 weeks from three over-conditioned repeat breeder dairy heifers (RBH) and two normal virgin heifers (VH, controls) of the Swedish Red breed, monitored by body weight and condition. Oocyte quality was assessed under stereomicroscope and further examined by transmission electron microscope for accumulation of cytoplasmic lipid deposits. After OPU, the RBH yielded more low quality oocytes (60% vs 52% for VH, p = 0.14). The relative occupancy of osmophilic lipid droplets in the cytoplasm was higher in oocytes of bad quality compared with good ones, especially in RBH (p = 0.08) but also in VH (p = 0.11). Moreover, the oocytes from over-conditioned RBH showed higher amounts of cytoplasmic lipid deposits both in good (p = 0.14) and, even more prominent, in bad quality oocytes (p = 0.06). Such accumulation of lipid droplets may imply increased sensitivity to oxidative stress, hinder cytoplasmic maturation and lead to subfertility, as accounted in over-conditioned repeat breeders of the Swedish Red breed.
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- Båge, Renee
(författare)
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Alpackans förlossning
- 2011
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Ingår i: Alpacka Nytt. ; , s. 4-4
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Tidskriftsartikel (populärvet., debatt m.m.)
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| 6. |
- Båge, Renee, et al.
(författare)
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Characterization of coagulase negative staphylococci from cases of subclinical mastitis in dairy cattle in Kampala, Uganda
- 2014
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Ingår i: Irish Veterinary Journal. - : Springer Science and Business Media LLC. - 2046-0481. ; 67
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Tidskriftsartikel (refereegranskat)abstract
- Background: Coagulase negative staphylococci (CNS) are the most common pathogens leading to subclinical mastitis (SCM) in dairy cattle in Uganda. Coagulase negative staphylococci can vary between bacterial species in how they cause disease. The aim of the study was to characterize CNS, from cows with SCM in Uganda, at the species level. Findings: Quarter milk samples (n = 166) were collected from 78 animals with SCM. Bacteriological analyses were carried out at Makerere University, Kampala, Uganda and at the National Veterinary Institute (SVA), Uppsala, Sweden. The most common pathogens found in milk samples from cows with SCM were CNS (31.7%). Two species of CNS were found, S. epidermidis (85%) and S. haemolyticus (15%). Of the CNS isolates, 16/20 (80%) were positive for β-lactamase production (β+). Conclusions: In milk samples from cows with SCM caused by CNS, S. epidermidis was most prevalent, followed by S. haemolyticus
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| 7. |
- Båge, Renee, et al.
(författare)
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Dairy in peri-urban farming for food security and income
- 2014
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Ingår i: Urban and Peri-urban Agriculture for Food Security in Low-income Countries – Challenges and Knowledge Gaps. - 9789157692290 ; :2014:4, s. 60-63
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Bokkapitel (populärvet., debatt m.m.)
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