To examine the universal validity of results in preceding reports on hepatitis B antigen among inhabitants of Yachiho village, 4015 farmers in Nagano were investigated. Hepatitis B antigen were detected for 24 persons with single radial immunodiffusion method. The incidence of 0.6 per cent with the insensitive method was compatible with 1.3 per cent in the village with immune adherence hemagglutination method. The prefecture was devided into four areas. The areas where hepatitis B antigen was prevalent persons with elevated transaminase value were frequent.

We examined whether wiping acupuncture needles with cotton could remove Hepatitis C viruses (HCV) adhering to the needles. The needles were incubated in the serum from patients infected with HCV, then the needles were wiped with dry cotton or cotton soaked in 80% ethanol. RNA was extracted from these needles and the HCV genome was amplified by reverse transcription-polymerase chain reaction (RT-PCR). The results indicated that the HCV genome was not detected when the needles were wiped with dry cotton. However, in one of two experiments, the HCV genome was detected after wiping the needles with cotton soaked in ethanol. We also examined the HCV contamination on the needles extracted from patients infected with HCV. The HCV genome was detected on extracted needles that were not wiped with cotton, but the genome was not found on needles wiped with cotton at the time of extraction. Therefore, wiping acupuncture needles with cotton might effectively remove HCV on the contaminated needles, but the viruses could not always be re-moved by simply wiping the needles with cotton.

This research aims to investigate the impact of fever on total mechanical ventilation time (TVT) in critically ill patients. Subgroup analysis was conducted using a previous prospective, multicenter observational study. We included mechanically ventilated patients for more than 24 hours from 10 Korean and 15 Japanese intensive care units (ICU), and recorded maximal body temperature under the support of mechanical ventilation (MAX(MV)). To assess the independent association of MAX(MV) with TVT, we used propensity-matched analysis in a total of 769 survived patients with medical or surgical admission, separately. Together with multiple linear regression analysis to evaluate the association between the severity of fever and TVT, the effect of MAX(MV) on ventilator-free days was also observed by quantile regression analysis in all subjects including non-survivors. After propensity score matching, a MAX(MV) ≥ 37.5℃ was significantly associated with longer mean TVT by 5.4 days in medical admission, and by 1.2 days in surgical admission, compared to those with MAX(MV) of 36.5℃ to 37.4℃. In multivariate linear regression analysis, patients with three categories of fever (MAX(MV) of 37.5℃ to 38.4℃, 38.5℃ to 39.4℃, and ≥ 39.5℃) sustained a significantly longer duration of TVT than those with normal range of MAX(MV) in both categories of ICU admission. A significant association between MAX(MV) and mechanical ventilator-free days was also observed in all enrolled subjects. Fever may be a detrimental factor to prolong TVT in mechanically ventilated patients. These findings suggest that fever in mechanically ventilated patients might be associated with worse mechanical ventilation outcome.
Asian Continental Ancestry Group ; Body Temperature ; Critical Illness* ; Fever* ; Humans ; Intensive Care Units ; Linear Models ; Observational Study ; Propensity Score ; Prospective Studies ; Reference Values ; Respiration, Artificial*