Industrial Fluorosis of Farm Animals in England, Attributable to the Manufacture of Bricks, the Calcining of Ironstone, and to Enamelling Processes

Blakemore, F.; Bosworth, T.J.; Green, H.H.

doi:10.1016/s0368-1742(48)80026-3

Cited by 28 publications

(6 citation statements)

References 8 publications

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“…In recent years it has been the subject of a number of intensive studies by several experiment stations and public and private research laboratories. A very important consideration arises from the fact that forage which has absorbed a considerable amount of fluorine may cause fluorosis in cattle or sheep without showing any apparent lesions on the foliage (53,58). Serious economic damage has been ascribed to this fluorosis (51).…”

Section: Fluorine Compoundsmentioning

confidence: 99%

Gas Damage to Plants

Thomas¹

1951

Annu. Rev. Plant. Physiol.

121

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Section: Fluorine Compoundsmentioning

confidence: 99%

Gas Damage to Plants

Thomas¹

1951

Annu. Rev. Plant. Physiol.

121

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“…That all fluoride deposited in the skeleton is not fixed irreversibly is slhown by its mobilizationi following a reduction in fluoriide intake (1,(3)(4)(5)(6)(7)(8)(9). B3run and( his associates (4) reported that men whlo had absorbed fluoride from cryolite clust maintaiined a higl level of fluioride in the urine for as long as t years followinig the period of exposure.…”

mentioning

confidence: 99%

“…Similairly, Largenit anid Heyrotlh (3) anid Larg,ent (5) founiid that urinary exeretioni of fluoride in excess of the inftalke continiued at a progressively decreasiing Iate for as long as 2 years after the ingestioni of large aimounits of fluoride. Blakemore aund hiis co-workers (6) fluoride from bone lhas been obtained in cattle (6) anid in rats (7)(8)(9). (10).…”

mentioning

confidence: 99%

Urinary Excretion of Fluoride following Defluoridation of a Water Supply

Likins¹,

McClure²,

Steere³

1956

Public Health Reports (1896-1970)

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“…Nos estágios iniciais de uma fluorose observam-se alterações no esqueleto que correspondem a uma osteomalácia hipofosfatêmica (Cohrs 1941, Blakemore et al 1948, Obel 1969. No Experimento 1, os bovinos ingeriram diferentes quantidades de flúor através do suplemento mineral, sendo que em um tratamento os bovinos chegaram a ingerir 1920 mg flúor/dia.…”

Section: Discussionunclassified

Estudos histológico-morfométricos e microrradiográficos de costelas de bovinos suplementados com fosfato de rocha

et al. 1997

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Pesq. Vet. Bras. 17(3/4):96-104, jul./dez. 1997 96 SINOPSE.-O objetivo do presente trabalho foi o de avaliar, através de técnicas especializadas, as possíveis alterações ós-seas produzidas em bovinos em decorrência da ingestão prolongada de diferentes níveis de flúor contido no fosfato de rocha de Tapira utilizado como fonte suplementar de fósforo. No primeiro experimento bovinos confinados ingeriram, durante 6 meses, quantidades variáveis (63 e 128g/dia) de fosfato de Tapira contendo 1.3% de flúor. No segundo experimento, bovinos em pastos de Brachiaria decumbens ingeriram, durante 33 meses, misturas minerais contendo diferentes níveis de fosfato de rocha de Tapira. No terceiro experimento, novilhas com idade inicial média de 14 meses ingeriram mistura mineral com fosfato de Tapira até a quinta lactação inclusivamente. Através de exames histológicos, morfométricos e microrradiográficos das amostras de costelas, não se observaram alterações da normalidade óssea, bem como não foram registradas diferenças entre amostras provenientes de diferentes tratamentos. Tais achados permitem inferir que, do ponto de vista de alterações ósseas, o fosfato de rocha de Tapira pode ser utilizado como fonte suplementar de fósforo para bovinos, nas dosagens, períodos e manejos alimentares estudados, sem risco de produzir alterações patológicas nos esqueleto dos animais. The present study was conducted to evaluate possible bone changes in cattle due to the ingestion of different levels of fluorine from rock phosphate used as a phophorus supplement. The bone material studied were ribs collected from cattle of three experiments where Tapira rock phosphate was used at different levels and during different periods as a partial or sole source of supplementary phosphorus. In the first experiment feedlot cattle ingested during a 6 month period 63 and 128g/day of Tapira rock phosphate containing 1.3% fluorine. In the second experiment cattle maintained in Brachiaria decumbens pastures during 33 months ingested several levels of Tapira rock phosphate in the mineral mixtures. In the third experiment heifers averaging 14 months of age ingested a mineral supplement with Tapira rock phosphate until the 5th lactation period. Careful examination of the rib samples by histological, morphometric and microradiographic techniques revealed no abnormalities which could be related to fluorine ingestion, neither any differences among tretaments regarding the bone structure. These findings support the conclusion that, as far as bone alterations are concerned, Tapira rock phosphate could be used as a source of phosphorus for cattle under the conditions described in the experiments, a practice which would markedly reduce the cost of phosphorus supplementation.INDEX TERMS: Fluorine, phosphorus supplementation, rock phosphate, bone alterations, cattle.

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Industrial Fluorosis of Farm Animals in England, Attributable to the Manufacture of Bricks, the Calcining of Ironstone, and to Enamelling Processes

Cited by 28 publications

References 8 publications

Gas Damage to Plants

Gas Damage to Plants

Urinary Excretion of Fluoride following Defluoridation of a Water Supply

Estudos histológico-morfométricos e microrradiográficos de costelas de bovinos suplementados com fosfato de rocha

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