HIPOFOSFOROSE EM BOVINOS NO MUNICÍPIO DE CONTAGEM – MINAS GERAIS HYPOPHOSPHOROSIS IN BOVINES IN THE CONTAGEM MUNICIPALITY - MINAS GERAIS, BRAZIL

Abstract

<!-- @page { margin: 2cm } --> <p class="western" align="justify">Foram estudados casos de hipofosforose em bovino do município de Contagem, Estado de Minas Gerais, explorados na produção de leite. Realizou-se as dosagens de cálcio e fósforo séricos em seis animais doentes, antes e 21 dias após iniciado o tratamento com Phos-20 e farinha de osso à vontade no cocho. Foram feitas as determinações de cálcio e fósforo no solo e no capim jaraguá (Hyparrhenia rufa) dos pastos nas duas fazendas. Fez-se no lote 1 o tratamento parenteral com Phos-20, na dose diária de 10 ml por 100 quilos de peso animal durante 10 dias e farinha de osso à vontade, no cocho com sal comum ao lado. Ao segundo lote, durante 10 dias, administrou-se 1 mg de sulfato de cobalto, "per os" em 20 ml de água, diariamente por animal e sal comum à vontade; posteriormente, em face do resultado negativo para o cobalto, continuou-se com o tratamento do primeiro lote, apresentando melhora muito acentuada no quadro clínico; o terceiro lote, sem tratamento por igual período. Posteriormente, o tratamento com farinha de osso, sal comum e Phos-20 restabelecendo parcialmente no espaço de algum tempo, persistindo, como seqüela, a esterilidade. Nos bovinos do primeiro lote, após a primeira semana de tratamento com Phos-20 e farinha de osso, verificou-se a remissão dos sintomas. Em todos animais tratados com fontes de fósforos, a fosfatemia se restabeleceu a níveis normais, quando se generalizou o uso da farinha de osso e sal comum à vontade na alimentação. Verificou-se estreita correlação entre os níveis séricos de fósforo animal com teor deste elemento no solo e no capim jaraguá (Hyparrhenia rufa), caracterizado por um limite crítico de deficiência. O diagnóstico de hipofosforose baseou-se na análise dos dados clínicos: anamnese, sintomas, níveis séricos de fósforo dos bovinos, exame histopatológico do tecido ósseo e teores de fósforo na forrageira e no solo das duas fazendas onde se realizou a pesquisa.</p><!-- @page { margin: 2cm } --> <p class="western" align="justify">Cases of hypophosphorose in dairy cattle were studied in Contagem County in the State of Minas Gerais - Brazil. The serum and calcium levels of six (6) sick animals, before and twenty-one (21) days after the treatment began, were determined. The treatment consisted of Phos-20 and bonemeal which were permanently available in the feeder. The levels of calcium and phosphorous in the soil and in the “jaraguá” grass (Hyparrhenia rufa) of the pasture of the two ranches were also determined. In the first group, the parenteral treatment consisted of Phos-20, given in a daily dose of l0 ml per 100 kg of animal weight for 10 days and bonemeal permanently available, in the feeder with salt (NaCL) alongside. In the second group, 1 mg of cobalt sulphate, diluted in 20 ml of water, was administered by mouth to each animal daily for 10 days and salt was always available to each. Afterwards, because of the negative result of the cobalt treatment in this group, the treatment which had been administered the first group, was given to the second. Following this, the clinical picture of the cattle in the second group showed definite improvement. The third group was given no treatment for an equal period of time. After the bonemeal salt, and Fhos-20 treatment, the cattle recovered partially, but were left sterile, a side-effect of the treatment. In the cattle of the first group the symptoms disappeared after the first week of treatment with Phos-20 and bonemeal. In all of the animals treated with phosphorous sources the phosphostemia returned to normal levels, when the bonemeal and salt were furnished constantly in the feed. There was a close correlation between the phosphorous levels in the serum of the animals and the phosphorous levels in the soil and the “jaraguá’ grass (Hyparrhenia rufa). The clinical diagnosis of hipophosphorous was based on the analysis of the following clinical data: symptoms, disease history, the level of phosphorous in the cattle serum the histopathological exam of bone tissue, and the phosphorus levels in the grazing grass and soil of the two ranches where the experiment was carried out.</p>