1,721,020 research outputs found
Bacteria Removal and Viability attenuation by means of Electrostatic Barrier
No full textAbstract
This study is focused on bacterial control through the removal and attenuation of viability by means of a commercial electrostatic air cleaner inserted in the ductwork of a central heating and air-conditioning system. Adapting the system to include an electrostatic barrier resulted, on an average, in removal of 88% of the bacteria in the airflow. In addition, the ratio of viable to non-viable organisms, calculated on the basis of epifluorescence measurements, was changed appreciably by passage through the electrostatic filter. Evaluation of performance was followed by two different strategies of sampling-analysis: a plate count method and epifluorescence microscopy. The system overall was highly efficient in removing the bacteria, since those few that evaded the filter underwent attenuation of around 50% of their viability on passage through it. This work suggests a strong positive effect when an electrostatic barrier is inserted in a ventilation duct
Characterization of necrophagous entomofauna in a typical agricultural area in Emilia-Romagna region (Northern Italy)
No full textPneumonia disease assessment using a slaughterhouse lung-scoring method
No full textThe aims of this study were the evaluation of a quantitative method for the assessment of pneumonia lesions applied to heavy-weight slaughtered pigs, the identification of risk factors connected with the increase in the prevalence and severity of the lesions and the evaluation of a possible correlation between the presence of pneumonia lesions and the decrease in the carcass quality. The lungs of 10 041 pigs (109 slaughtered batches) coming from 91 farms located in Northern Italy were examined. Lung lesions were scored using the method developed by Madec and Kobisch (Journ. Rech. Porc. Fr., 14, 1982, 405). Before the scoring, anamnestic information regarding the farm of origin of each batch were collected. For 41 batches (3603 pigs), information about carcass quality were also collected. Pneumonia lesions were found in 59.6% of the lungs (range 3-91%), and the average batch score was 2.11 (range 0.03-7.15). We identified as farm risk factors those related to an increase in the severity of the lung lesions, the presence of breeders within the herd, the starting of a growing cycle during the winter season and the lack of vaccination programmes to Mycoplasma hyopneumoniae. Moreover, we also found a statistically significant association between the increase in the mean lung score of the batch and the decrease of the carcass quality
Utilizzo del punteggio polmonare (lung score) nei suini italiani : validazione del metodo, valutazione della prevalenza e dei fattori di rischio associati all’infezione da Mycoplasma hyopneumoniae
No full textImpiego del punteggio polmonare al macello nella valutazione della malattia respiratoria da M. hyopneumoniae sul suino pesante
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