Dairy Calf
Mostrando 13-24 de 38 artigos, teses e dissertações.
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13. QTL identification in bovine chromosomes 10, 11 and 12 associated with heat stress / Identificação de QTL nos cromossomos 10, 11 e 12 associados ao estresse calórico em bovinos
Heat stress impacts greatly animal production systems on tropical regions causing economical losses and affects milk production, meat production, physiology, reproduction, calf mortality and utter health. One way to reduce these losses is to use the genetic variation between Bos taurus and Bos indicus breeds for heat tolerance coupled with linked molecular m
Publicado em: 2007
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14. BOVINOCULTURA NA AMAZÔNIA: EVOLUÇÃO E SUAS IMPLICAÇÕES COMO ATIVIDADE ECONÔMICA NO AMAZONAS. (O caso nos eixos rodoviários AM-070 e AM-010 e a ilha do Careiro da Várzea)
The livestock occupation of Amazonian lands retraces the time upon of European settling, but was after of middle of XX century, that growth the amazonian cattle flocks, converting it in environmental problem, that coincided with constructions of the greats roadways, had given access to new way of occupation of lands into the region, and still grown by the in
Publicado em: 2006
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15. Processamento de milho e suplementação com monensina para bezerros leiteiros pré e pós desmama precoce. / Corn processing and monensin supplementation for dairy calves, pre and post early-weaning.
Tanto a administração de monensina quanto o processamento de grãos alteram o padrão de fermentação ruminal de forma a aumentar a disponibilidade de energia e proteína para o animal, resultando em melhor desempenho. Dois trabalhos foram conduzidos com o objetivo de avaliar o efeito de concentrados contendo milho laminado a vapor ou floculado, com ou se
Publicado em: 2002
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16. Acidose metabólica em bezerros neonatos com diarréia.
O equilíbrio iônico nos fluidos corporais; Mecanismo respiratório; Mecanismo Metabólico; Como interpretar valores de ácido-base; Diagnóstico de acidose em bezerros com diarréia; Cálculo do volulme e método de administração.
São Carlos. Publicado em: 1997
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17. Horizontal Transmission of Shiga Toxin-Producing Escherichia coli within Groups of Dairy Calves
To examine the dissemination of Shiga-toxigenic Escherichia coli (STEC) within cattle groups, dairy calves on two farms utilizing different calf-rearing practices were exposed to a traceable STEC strain. Test strain dissemination differed significantly between farms, with a higher prevalence being associated with group penning. Pen floors and calf hides may
American Society for Microbiology.
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18. MODE OF ACTION OF ANTIBIOTICS IN THE NUTRITION OF THE DAIRY CALF IV. Escherichia coli: Phagocytosis of Antibiotic-Resistant Strains of1
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19. Virus-like particles, 45 to 65 nm, in intestinal contents of neonatal calves.
Enveloped virus particles 45 to 65 nm in diameter, tentatively called minicorona virus, were detected by electron microscopy in the intestinal contents of one normal and seven diarrheic calves in Quebec dairy herds. The agent was shown to be antigenically unrelated to the Nebraska calf diarrhea coronavirus and to the bovine viral diarrhea virus by counterimm
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20. Role of Calf-Adapted Escherichia coli in Maintenance of Antimicrobial Drug Resistance in Dairy Calves
The prevalence of antimicrobial drug-resistant bacteria is typically highest in younger animals, and prevalence is not necessarily related to recent use of antimicrobial drugs. In dairy cattle, we hypothesize that antimicrobial drug-resistant, neonate-adapted bacteria are responsible for the observed high frequencies of resistant Escherichia coli in calves.
American Society for Microbiology.
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21. Evaluation of DNA probes for detection of Shiga-like-toxin-producing Escherichia coli in food and calf fecal samples.
The use of DNA probes for Shiga-like toxin I (SLT-I) and SLT-II for detection of SLT-producing Escherichia coli (SLTEC) in foods and calf fecal samples was evaluated. Enrichment cultures were prepared from food or fecal samples. Colonies formed by plating of enrichment cultures were probed for SLTEC by colony hybridization. Alternatively, enrichment cultures
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22. Comparison of Shiga-Toxigenic Escherichia coli Prevalences among Dairy, Feedlot, and Cow-Calf Herds in Washington State
Shiga-toxigenic Escherichia coli (STEC) strains were isolated from 7.4% of 1,440 fecal and farm environmental samples. Shiga toxin gene and STEC prevalences were significantly associated with animal production type and season. A range of serogroups were identified. Nine percent of isolates possessed all three principal virulence markers: stx2, eae, and ehx.
American Society for Microbiology.
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23. Epidemiology of Haemophilus somnus infection in dairy cattle in Quebec.
Serological studies on Haemophilus somnus infection were carried out on 1795 cattle from 231 dairy herds in the province of Quebec. An epidemiological investigation was done in each of the dairy operations. Seroreactivity rate and mean log2 titer for all the sera were 55.4% and 4.1620 respectively. Cattle from eastern regions of Quebec demonstrated the lowes
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24. The utility of ketoprofen for alleviating pain following dehorning in young dairy calves
To determine if ketoprofen, in addition to local anaesthesia, reduces pain following dehorning, we experimentally dehorned dairy calves, less than 2 weeks of age, with (20 calves) or without (20 calves) intramuscular injections of ketoprofen. All calves received a local anesthetic (lidocaine) prior to dehorning and were dehorned with heat cauterization. Cort
Canadian Veterinary Medical Association.