RESUMO
This work describes various controlled tests that were conducted for the purpose of comparing the efficacy and effects of two antihilmintics (2-(4"-thiazolyl) -benzimidazole (thiabendazole) and thiodiphenilamine (phenothiazine) among the Nelore cattle raised on an extensive grazing in a pasture comprised of Panicum maximum (colonião grass). For such tests there was a selection of 21 heifers weighing between 128 and 227 kgs., which animals presented 200 or more Strongylides eggs per gram of feces. Those heifers were sorted out at random in three groups of seven animals each, one of which was left as a "stand by" group without any treatment at all. The two other groups were treated with phenothiazine and thiabendazole, respectively. At the end of the treatment, which lasted 25 days, four animals of each group were sacrified and a search for worms was performed in their gastrointestinal tracts. The efficacy of such treatments was noticed through the checking of worms in the feces. The efficiency of the antihelmintics was verified by means of hematological and biochemical testing of the sarum, and by weighing the animal. The results thus secured were analysed statistically.
O presente trabalho descreve testes controlados que foram conduzidos com o fito de comparar a eficácia e os efeitos de dois antihelmínticos, - o 2-(4"-thiazoly) - -benzimidazole e a Tiodifenilamina (Fenotiazina), em bovinos da raça Nelore, criados em regime extensivo em pasto de capim colonião (Panicum maximum). Para os testes foram selecionados 21 novilhos, cujos pesos variavam entre 128 e 227 kg e que apresentavam nas fezes 200 ou mais ovos de estrongilídeos por grama de fezes. Esses animais, por sorteio, foram separados em 3 grupos, contituídos por 7 animais, sendo um lote considerado testemunho, não recebendo portanto nenhum medicamento; os outros dois tratados respectivamente pela Fenitiazina e pelo Thiabendazole. No final do experimento que durou 25 dias, foram sacrificados 4 animais de cada grupo, sendo pesquisado vermes no trato gastrintestinal. A eficácia dos tratamentos foi observada por exame de fezes e pesquisa de vermes no trato digestivo. Os efeitos dos antihelmínticos foram verificados por exames hematológicos, bioquímicos do soro e pela pesagem dos animais. Os resultados obtidos foram analisados estatisticamente.
RESUMO
This work describes various controlled tests that were conducted for the purpose of comparing the efficacy and effects of two antihilmintics (2-(4"-thiazolyl) -benzimidazole (thiabendazole) and thiodiphenilamine (phenothiazine) among the Nelore cattle raised on an extensive grazing in a pasture comprised of Panicum maximum (colonião grass). For such tests there was a selection of 21 heifers weighing between 128 and 227 kgs., which animals presented 200 or more Strongylides eggs per gram of feces. Those heifers were sorted out at random in three groups of seven animals each, one of which was left as a "stand by" group without any treatment at all. The two other groups were treated with phenothiazine and thiabendazole, respectively. At the end of the treatment, which lasted 25 days, four animals of each group were sacrified and a search for worms was performed in their gastrointestinal tracts. The efficacy of such treatments was noticed through the checking of worms in the feces. The efficiency of the antihelmintics was verified by means of hematological and biochemical testing of the sarum, and by weighing the animal. The results thus secured were analysed statistically.
O presente trabalho descreve testes controlados que foram conduzidos com o fito de comparar a eficácia e os efeitos de dois antihelmínticos, - o 2-(4"-thiazoly) - -benzimidazole e a Tiodifenilamina (Fenotiazina), em bovinos da raça Nelore, criados em regime extensivo em pasto de capim colonião (Panicum maximum). Para os testes foram selecionados 21 novilhos, cujos pesos variavam entre 128 e 227 kg e que apresentavam nas fezes 200 ou mais ovos de estrongilídeos por grama de fezes. Esses animais, por sorteio, foram separados em 3 grupos, contituídos por 7 animais, sendo um lote considerado testemunho, não recebendo portanto nenhum medicamento; os outros dois tratados respectivamente pela Fenitiazina e pelo Thiabendazole. No final do experimento que durou 25 dias, foram sacrificados 4 animais de cada grupo, sendo pesquisado vermes no trato gastrintestinal. A eficácia dos tratamentos foi observada por exame de fezes e pesquisa de vermes no trato digestivo. Os efeitos dos antihelmínticos foram verificados por exames hematológicos, bioquímicos do soro e pela pesagem dos animais. Os resultados obtidos foram analisados estatisticamente.
RESUMO
This work was carried out from a large herd of Zebu Cattle (Indu-Brasil breed) situated in Araçatuba, SP, where the cattle has been raised in range conditions. As a managerial practices the heifers are put together with the sires, in a freely consorting plan, when they are 2 to 2,5 years-old. With an idea to gather some added information about this subject, it was considered to be worthwhile to observe if heifers which were permitted to run with the male, in the herd, younger than 2 to 2,5 years old, could calve their first youngs at an earlier age than those which were older when mated for the first time. The heifers were selected from the herd at random and were consorted with the sires (ratio = 1:25), at different ages, in two groups as follows: Group I) Eighty-two heifers with the age of 12 to 18 months, and Group II) Eighty-five heifers with the age of 20 to 36 months. The null hypothesis, therefore, was that females of the first group should bore their first young at the same mean age of those heifers pertaining to the second group. The alternative hypothesis would be that the females of the first group should produce their first youngs earlier than those heifers of the group II. The results were as follows: (the level of significance was 0,05) Group I: X = 1.262,30 days; S = 167,70 days and V = 13,29% Group II: X = 1.205,93 days; S = 141,33 days and V = 11,72% It is cl
O artigo apresenta resumo em inglês.
RESUMO
This work describes various controlled tests that were conducted for the purpose of comparing the efficacy and effects of two antihelminthics (Dimethyl-Trichloro-Oxiethyl Phosphonate and Thiodiphenilamine) among the Nelore cattle raised on an extensive grazing in a pasture comprised of Panicum Maximum (colonião) grass. For such tests there was a selection of 21 heifers weighing between 128 and 227 kgs., which animals presented 200 or more strongylides eggs per gram of feces. Those heifers were sorted out at random in three groups of seven (7) animals each, one of which was left as a stand by group without any treatment at all. The two other groups were treated with Phenothiazine and Neguvon, respectively. At the end of the treatment, which lasted 25 days, four (4) animals of each group were sacrificed and a search for worms was performed in their gastrointestinal tracts. The efficacy of such treatments was noticed through the checking of worms in the feces. The efficiency of the antihelminthics was verified by means of hematological and biochemical testings of the serum and by weighing the animals. The results thus secured were analyzed statistically. 1 The antihelminthic drugs (Demithyl-Trichloro-Oxiethyl Phosphonate Neguvon and Thiodiphenilamine (Phenothiazine) tested during this research presented antihelminthical results with an evident superiority performed by t
O artigo apresenta resumo em inglês.
RESUMO
This work describes various controlled tests that were conducted for the purpose of comparing the efficacy and effects of two antihelminthics (Dimethyl-Trichloro-Oxiethyl Phosphonate and Thiodiphenilamine) among the Nelore cattle raised on an extensive grazing in a pasture comprised of Panicum Maximum (colonião) grass. For such tests there was a selection of 21 heifers weighing between 128 and 227 kgs., which animals presented 200 or more strongylides eggs per gram of feces. Those heifers were sorted out at random in three groups of seven (7) animals each, one of which was left as a stand by group without any treatment at all. The two other groups were treated with Phenothiazine and Neguvon, respectively. At the end of the treatment, which lasted 25 days, four (4) animals of each group were sacrificed and a search for worms was performed in their gastrointestinal tracts. The efficacy of such treatments was noticed through the checking of worms in the feces. The efficiency of the antihelminthics was verified by means of hematological and biochemical testings of the serum and by weighing the animals. The results thus secured were analyzed statistically. 1 The antihelminthic drugs (Demithyl-Trichloro-Oxiethyl Phosphonate Neguvon and Thiodiphenilamine (Phenothiazine) tested during this research presented antihelminthical results with an evident superiority performed by t
O artigo apresenta resumo em inglês.
RESUMO
This work was carried out from a large herd of Zebu Cattle (Indu-Brasil breed) situated in Araçatuba, SP, where the cattle has been raised in range conditions. As a managerial practices the heifers are put together with the sires, in a freely consorting plan, when they are 2 to 2,5 years-old. With an idea to gather some added information about this subject, it was considered to be worthwhile to observe if heifers which were permitted to run with the male, in the herd, younger than 2 to 2,5 years old, could calve their first youngs at an earlier age than those which were older when mated for the first time. The heifers were selected from the herd at random and were consorted with the sires (ratio = 1:25), at different ages, in two groups as follows: Group I) Eighty-two heifers with the age of 12 to 18 months, and Group II) Eighty-five heifers with the age of 20 to 36 months. The null hypothesis, therefore, was that females of the first group should bore their first young at the same mean age of those heifers pertaining to the second group. The alternative hypothesis would be that the females of the first group should produce their first youngs earlier than those heifers of the group II. The results were as follows: (the level of significance was 0,05) Group I: X = 1.262,30 days; S = 167,70 days and V = 13,29% Group II: X = 1.205,93 days; S = 141,33 days and V = 11,72% It is cl
O artigo apresenta resumo em inglês.