Table 1 |
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Controlled investigations on the prophylactic effect of oral calcium drenching on milk fever. Preventive effect calculated as percentage reduction in milk fever incidence among treated cows as compared to controls. |
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| Reference |
Treatment |
Preventive effect on milk fever1) (MF incidence in experimentals vs. controls, %) |
Comments |
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|
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| [92] |
Calcium chloride gel × 4–10 Around 40 g Ca/dose |
86% (7.7 vs. 53.2) |
Average effect obtained in seven separate studies. Occational diarrhoea and loss of appetite |
| [60] |
Calcium chloride gel × 3–4 54 g Ca/dose |
51% (22.6 vs. 46.6) |
More cases of diarrhoea (17% vs. 10%) |
| [99] |
Calcium chloride gel × 4–10 36 g Ca/dose |
48% (25.6 vs. 48.8) |
More cases of milk fever > 48 hours after calving among treated cows (12.8% vs. 2.4%) |
| [82] |
Calcium chloride + calcium sulphate capsule × 4 46 g Ca/dose |
73% (14.6 vs. 54.8) |
No side-effects Administration of capsules eliminates the risk of aspiration |
| [42] |
Calcium propionate paste × 4 37 g Ca/dose |
42% (29 vs. 50) |
No effect on the incidence of milk fever in herds with low milk fever incidence |
| [75] |
Calcium chlorid + tricalcium phosphate gel × 4 54 g Ca/dose |
58% (4.9 vs.11.8) |
Significantly fewer cases of displaced abomasums (1.0% vs. 7.8%) |
| [3] |
Calcium chloride paste 4 50 g Ca/dose |
67% (14.3 vs. 42.9) |
Increased salivation following administration of the paste. |
| [2] |
Calcium chloride paste 1 × 3 + 1/2 × 2 50 or 25 g Ca/dose |
70% (10.0 vs. 33.3) |
|
| [84] |
Calcium propionate boli × 6 20 g Ca/dose Calcium chloride in oil × 4 54 g Ca/dose |
30% (25.3 vs. 36.0) 36% (23.2 vs. 36.0) |
Large number of cows (194 experimental cows and 713 control cows) |
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1) Preventive effect = 1 - RR = 1 - (incidence rate of milk fever among experimental cows/incidence rate of milk fever among control cows). | |||
Thilsing-Hansen et al. Acta Veterinaria Scandinavica 2002 43:1 doi:10.1186/1751-0147-43-1 |
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