Hatchery hygiene evaluation by microbiological examination of hatchery samples.
ABSTRACT This study was conducted to investigate the bacterial contamination of air and the surface of equipment and facilities in hatchery. In addition, the inhibitory effects of formaldehyde application methods on aerosol bacterial counts in the hatchers were also investigated. In the operating hatchers, the contamination of air by aerobic bacteria, coliform, and fungi was high, measuring over 300 cfu/63.6 cm(2). In the egg sorting room, contamination was moderate, whereas in the remaining sampling sites such as the setter room, candling-transfer room, and chick counting room, contamination was minimal, measuring less than 10 cfu/63.6 cm(2) for aerobic bacteria, 5 cfu/63.6 cm(2) for coliform, and 2 cfu/63.6 cm(2) for fungi. The bacterial contamination on the surface of the equipment and facilities showed similar tendencies with that of air. However, on the surfaces of the equipment and facilities in the hatcher room corridors and nonoperating hatchers where the bacterial contamination of the air was low, bacterial counts were high, measuring over 100 cfu/16 cm(2). Salmonella was mainly isolated from the hatcher rooms, chick counting room, and the related equipment and facilities but not from the areas used for the earlier processing step such as the egg receiving room, egg sorting room, setter rooms, and candling-transfer room. The Salmonella serotype that was most frequently isolated from the hatchery was Salmonella Senftenberg. The other occasional Salmonella serotypes such as Salmonella Schwarzengrund, Salmonella Madelia, Salmonella Montevideo, and Salmonella Enteritidis were isolated. The experimental group receiving formaldehyde by constant rate infusion during hatching had a significantly superior inhibitory effect on aerosol bacterial count 4 h before hatching as compared with the group receiving formaldehyde into a basin and the negative control group (P < 0.05).
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ABSTRACT: The inherent parallelism of artificial neural networks (ANNs) introduces several difficulties for its software implementation because of the sequential nature of von Neumann architectures. In contrast, hardware implementations offer the possibility to explore the massive parallelism implicit in this model. Also, due to the dynamic nature of ANN's synapses, a flexible hardware platform is required for obtaining efficient solutions. Implementations of ANNs in FPGAs overcome the lack of flexibility of ASICs, and are the most adequate technology for this task. One important question in this field is how to quickly and efficiently evaluate several alternative implementations taking into account the area and timing restrictions of the circuit. This paper presents a flexible high level description and synthesis tool called VANNGen, which allows the designer to explore different hardware implementations of ANNs. In addition, the user can generate synthesizable VHDL code for the Xilinx and Altera FPGA devicesReconfigurable Computing and FPGAs, 2005. ReConFig 2005. International Conference on; 10/2005