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Biomedical subjects

S Nonaka

Publications and source records attributed to S Nonaka.

At least 145 records · Page 8Linked to original sources

Regional differences of PCB and PCQ concentrations in the blood and subcutaneous fat tissue of residents of Nagasaki.

In this study, we analyzed PCB and PCQ concentrations in the subcutaneous fat tissue of residents of Nagasaki Prefecture, and compared these levels between the blood and subcutaneous fat tissue of people living in various parts of the prefecture. Seventy-one inhabitants were examined. In the blood, PCB concentrations in Tamanoura and Fukue were significantly higher than those in Nagasaki City. The CB% ratio in Tamanoura was significantly higher than that in Nagasaki and Isahaya. PCQ concentrations were below detection level except in one case. PCB concentrations in fishery areas showed higher levels than urban or agricultural areas. PCB concentration in the subcutaneous fat tissue was 100 times higher than that in the blood. PCQs could be detected in almost all of the subcutaneous tissues, but there was no regional difference in the PCQ concentration.

Adipose Tissue↗

[Evaluation of the efficacy of ceftriaxone in acute suppurative otitis media and acute exacerbation of chronic suppurative otitis media. A comparative study with cefotiam as the control].

In order to objectively evaluate the efficacy and the safety of ceftriaxone (CTRX) using once daily administration of 1 g to cases of acute suppurative otitis media and acute exacerbation of chronic suppurative otitis media, a group comparison study by the envelope method was conducted using cefotiam (CTM) as the control drug (2 g twice daily). The results obtained are summarized as follows. 1. Clinical efficacies evaluated by the committee were 71% in the CTRX group and 86% in the CTM group for acute suppurative otitis media, and 63% and 60%, respectively, for chronic suppurative otitis media. When all cases were considered both groups evidenced a clinical efficacy of 64%, and no significant difference was observed between the 2 groups. 2. Clinical efficacies evaluated by the physician in charge were 65% in the CTRX group and 86% in the CTM group for acute suppurative otitis media, and 72% and 60%, respectively, for chronic suppurative otitis media. When all cases were considered efficacies were, respectively, 70% and 64%, showing no significant difference between the 2 groups. 3. Bacteriological efficacies were 88% in the CTRX group and 86% in the CTM group for acute suppurative otitis media, and 74% and 62%, respectively, for chronic suppurative otitis media. With all cases bacterial eradication rates were, respectively, 76% and 67%. Bacterial eradication rates were always higher for the CTRX group than for the CTM group, but the difference was not significant between the 2 groups. 4. Against infections caused by Staphylococcus aureus alone, CTRX showed equal clinical and bacteriological efficacies to CTM. 5. As side effects, dermatitis, vomiting, and malaise were observed in 5 cases (4%) of the CTRX group and 3 cases (3%) of the CTM group. As clinical testing abnormalities, elevations of GOT, GPT, and Al-P, and thrombocytopenia were noted only in 3 cases (5%) of the CTRX group. Furthermore, all of these abnormalities were temporary and of moderate degree or mild, thus the safety of either drug was considered high. 6. Clinical utilities were 71% in the CTRX group and 86% in the CTM group for acute suppurative otitis media, and 72% and 62%, respectively, for chronic suppurative otitis media. When all cases were included, they were 72% and 66%, respectively, and there was no significant difference between the 2 groups. It is concluded from the above results that CTRX is a highly useful drug with once daily administration of 1 g in the treatment of suppurative otitis media.

Adolescent↗

The effect of chlorinated chemicals on porphyrin metabolism--the synergistic effect with chlorinated chemicals and low concentrations of griseofulvin.

The synergistic effect of chlorinated chemicals and 0.1% griseofulvin on porphyrin metabolism was investigated. Feeds containing 0.1% 4-chloro-m-cresol, 0.1% cumarone or 0.25% trichloroacetic acid with or without 0.1% griseofulvin were given to dd-y strain mice respectively. The treatments were continued for 10 to 450 days, after which coproporphyrin and protoporphyrin in the erythrocytes and liver were analyzed. In the 0.1% griseofulvin alone group, protoporphyria was induced in 6 of 55 dd-y strain mice, although the other 49 mice did not show any abnormal porphyrin metabolism and the severity of the protoporphyria was mild in the 6 mice. In the 4-chloro-m-cresol group, a slight elevation of erythrocytic porphyrins was seen, but the difference was not statistically significant. Elevation of the hepatic porphyrins was not seen. Trichloroacetic acid and cumarone did not influence porphyrin metabolism, and also there was no synergistic effect of griseofulvin on porphyrinopathy. These results suggest that the three chemicals selected in this study are not capable of inducing porphyrinopathy.

Animals↗

Prevention of horizontal transmission of hepatitis B: efficacy of hepatitis B immunoglobulin and vaccine in an institution for the handicapped.

In a Japanese institution for the handicapped with confirmed continuous outbreaks of hepatitis B virus (HBV) infection by horizontal nosocomial transmission, 29 susceptible subjects (8 institutionalized children and 21 medical staff) were injected intramuscularly with anti-human HBs immunoglobulin (HB Ig) and subcutaneously with HB vaccine. All cases acquired HBs antibody after injection of HB Ig and seropositivity for HB after the third inoculation of HB vaccine was 78.6%. No new case of HB occurred among the study population throughout the period investigated. This suggested the effectiveness of HB Ig and HB vaccine in the prevention of horizontal nosocomial transmission of HBV.

Adolescent↗

Hemagglutination inhibition antibodies in congenital rubella syndrome. A 17-year follow-up in the Ryukyu Islands.

We studied long-term rubella hemagglutination inhibition (HI) antibody titers in 381 children born between 1965 and 1966 with congenital rubella syndrome and in 344 of their mothers, who had had postnatally acquired rubella infection. Serum specimens were obtained 12 times during a 17-year period. The initial geometric mean titer of the rubella HI antibody was higher in the children than in their mothers, but the titer declined more rapidly in the children. After 17 years it was 2(5.4) in the children and 2(6.9) in the mothers. In 13 (3.4%) of the children, the rubella HI antibody titer reverted to negativity after three to 17 years. None of the mothers showed a reversion.

Adolescent↗