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Rotavirus accounts for a significant proportion of acute gastroenteritis cases in children less than 5 years in Italy, many of whom require frequent primary care consultations, or care in emergency room or hospital settings.

In order to investigate the main sites of action of phototherapy in the treatment of neonatal jaundice we studied (a) the in vivo and in vitro relationship between the hematocrit and the effectiveness of phototherapy, and (b) the effect of varying the skin area exposed to light. The results show that the hematocrit does not influence in vivo the efficacy of phototherapy, while they confirm that the total skin surface exposed to light is important in determining the effectiveness of light treatment. The authors have also studied the possible action of phototherapy on bilirubin solutions placed into the postmortem brain or the stomach. The results suggest that blue light does not penetrate strongly enough to photomodify the exposed pigment.

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