Urinary calculi in ruminants

Ac, Field

doi:10.1079/pns19690038

Cited by 6 publications

(13 citation statements)

References 24 publications

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“…A high incidence of uroliths was found in lambs which were given diets adequate in P. We found that these lambs had high concentrations of P in urine, a factor known to be of prime importance in the formation of uroliths (Field, 1969). This finding illustrates the need to limit the P intake of growing lambs, especially when pelleted diets are given.…”

Section: Discussionmentioning

confidence: 56%

Effect of diets low in calcium and phosphorus on the development of growing lambs

1975

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SUMMARYFive groups of four 8-week-old Blackface lambs were used to compare the effects of dietary deficiencies of calcium and/or phosphorus: four were given for 16 weeks a semi-purified diet low in Ca (0·07 %) and P (0·13 %), either unsupplemented (LCaLP) or supplemented with 0·3 % Ca (NCaLP), 0·3 % P (LCaNP) or both (NCaNP), and the remaining group was slaughtered initially.The only clinical abnormality observed was twisting of the forelegs in group LCaLP. Food intake was depressed by 26 % in LCaNP group, by 41·5 % in NCaLP group but was largely unaffected in group LCaLP. Apparent D.M. digestibility was lower for group NCaLP (57·7 %) than for other groups (61·2 %). Differences in live weight and body fat reflected the differences in food intake between treatments but the weights of fat-free body components were lowest in the groups given low P diets.The LCaNP diet decreased plasma Ca and increased plasma P but the NCaLP diet had the opposite effects. The LCaLP diet had no effect on plasma Ca and decreased plasma P less than the NCaLP diot.The three mineral deficient diets caused equally marked decreases in Ca and P retention but did not induce negative balances; they also impaired the quality of bone in the tibia and lumbar vertebra, by reducing both the amount of bone matrix and the degree to which it was mineralized, and produced histological lesions of rickets and osteoporosis. Diets low in P caused a marked fall in Mg content of the skeleton.Urolithiasis was common in lambs given diets adequate in P.

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Section: Discussionmentioning

confidence: 56%

Effect of diets low in calcium and phosphorus on the development of growing lambs

1975

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“…The corm of some varieties, such as Addo, Birra, Genticha and Gulumo had Ca: P ratios below 1:1. Low ratio of Ca: P (<2:1) may contribute to an increase in the incidence of urinary calculi (uroliths) in intact and castrated male sheep (NRC 1980), a condition where by minerals deposit in the urinary tract (Field 1969).…”

Section: Calciummentioning

confidence: 99%

Yield and mineral content of ten enset (Ensete ventricosum) varieties

Nurfeta

Tolera

Eik

et al. 2007

Trop Anim Health Prod

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“…Although the aetiology of uroliths of the 604 A. C. FIELD, C. S. MUNRO AND N. F . STTTTLE magnesium ammonium phosphate type is not completely understood, it is generally accepted that the pH of the urine and the concentration of P in urine are important determinants in urolith formation (Field, 1969). It was, therefore, surprising to find that the highest incidence of uroliths were associated with the lowest urinary P concentrations.…”

Section: Discussionmentioning

confidence: 99%

Dried poultry manure as a source of phosphorus for sheep

1977

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Feeding and balance trials with 32 P were carried out to measure the true absorption of P in battery and broiler waste and to assess the risk of urolithiasis in sheep.Groups of six, 8-week-old Scottish Blackface lambs were given one of eight experimental diets containing barley and either 15, 30, 45 or 60 % of dried broiler or battery waste. After about 12 weeks on the diet, balance trials with 32 P were conducted on a sample of the female lambs from each dietary group. The phosphorus intakes ranged from 4-6 to 15-9g/day.Poultry waste was a good source of P. The proportion of dietary P absorbed by the lambs (A) ranged from 0-49 to 0-90 and was inversely related to the dietary intake of P (I). The relationship was A = 0-893 -0-02191. All lambs were in positive P balance (0-24-2-81 g/day), but only the bones from the lambs consuming the diets containing 45 and 60 % broiler waste were not osteoporotic.All lambs absorbed more P than they retained and the partition of the excess between urine and faeces were very variable.No clinical cases of urolithiasis were seen, but uroliths were found at post-mortem. The incidence was highest in lambs consuming broiler waste and in lambs consuming the diets containing 15% poultry waste. INTRODUCTIONMATERIALS AND METHODS

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Urinary calculi in ruminants

Cited by 6 publications

References 24 publications

Effect of diets low in calcium and phosphorus on the development of growing lambs

Effect of diets low in calcium and phosphorus on the development of growing lambs

Yield and mineral content of ten enset (Ensete ventricosum) varieties

Dried poultry manure as a source of phosphorus for sheep

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