184 resultados para INFECCIONES BACTERIANAS
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To determine the effects of the pre-slaughter showering on some meat quality parameters, the bacterial changes in the Longus colli muscle and the contamination of the meat surface at three different points of the slaughter line were studied. Sixteen Nelore steers were slaughtered in a commercial slaughterhouse. Eight animals were submitted to pre-slaughter showering; a control group of eight animals were slaughtered without showering. Aseptic samples were collected for evaluations in the muscle depth, in the anterior portion of Longus colli muscle, just before chilling. The swab method was used for sampling carcass surface right after dressing, before carcasse washing, and at the beginning of chilling. Longus colli muscle samples were used to determine bacteria total count, psychrotrophic count and Enterobacteriaceae count, after 5, 24 and 48 hours from slaughtering, and in carcass surface, bacteria total count and psychrotrophic count. Multivariate methods were used to evaluate bacterial data the use of pre-slaughter showering did not affect the bacteria total counts, in the deep tissue. A significant growth of psychrotrophic bacteria was detected in both treatments. No significant differences (P>.05) were found in bacteria total count and psychrotrophic count between treatments. Also, no differences (P>.05) were detected between counts taken at different momments at the kill floor: skinning, before carcasse washing, and at the cooler, before chilling.
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Microbial contamination of an enclosed area may come from outside or be generated within the area itself. In the study described here, bioaerosol levels in hospital air were quantified and related to those found in the air outside, taking into account some of the environmental variables that affect air quality, such as the number of occupants of a room and the type of ventilation. Airborne bacteria were collected for five minute by blowing air at 500 L min -1 in high speed jets on to the surface on plates culture in a single-stage bioaerosol impactor. The mean viable count of bacteria in the air outside in the hospital, São Paulo State, was 77 ± 4 CFU m -3, while in the air inside the hospital it was 302 ± 260 CFU m-3. The operating theatre was the only space sampled with a controlled environment and, after orthopedic surgery, it had the highest bioaerosol count recorded (867 ± 482 CFU m-3). In the enclosed environments, nine bacterial species were identified. Despite the difficulty in establishing precise numbers of bacteria in the bioaerosols in hospital environments, the values obtained demonstrate a need to instigate suitable programs to keep the microbial density low in these environments, and eliminate microorganisms presenting a significant risk to their occupants. It is also recommended that such programs include the monitoring of hospital air, with the aim of defining standards for acceptable numbers of bacteria in the bioaerosol.
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Pós-graduação em Aquicultura - FCAV
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Pós-graduação em Biologia Geral e Aplicada - IBB
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
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Pós-graduação em Medicina Veterinária - FMVZ
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)