Mortality of Atomic Bomb Survivors in Nagasaki 1

In 1945, an atomic bomb was exploded on Nagasaki. The Scientific Data Center for the Atomic Bomb Disaster was founded in Nagasaki University to analyse radiation effects on atomic bomb survivors. There were about 110,000 victims registered living in Nagasaki as of 1968. Since then, data of 2,000,000 items of health examination has been stored in the computer in the Scientific Data Center. The analysed results of the mortality, the survival and the risk estimation were presented

Effects of the Atomic Bomb Explosion in Nagasaki : A Medical Perspective 1

A review of the medical effects of the Nagasaki atomic bomb explosion encountered between 1945 and 1990 was conducted. In the early stage, severe and various manifestations due to a combination of heat rays, blast and radiation were detected, but the accurate number of deaths among victims during this early period remains obscure. Keloid scars, cataract, leukemia, thyroid cancer, breast cancer and lung cancer have been established as diseases related to the atomic bomb explosion. Recent epidemiologic investigations show that the incidence of other diseases such as gastric cancer and skin cancer are also relatively high among atomic bomb survivors in Nagasaki

Effects of Low Dose Radiation on Mammals 1

Radiation has been applied widely to clinics, researches and industries nowadays. Irradiation by atomic bomb produced many victims in Hiroshima and Nagasaki. Radiation effects on animals and human belings have been reported extensively, especially at a dose range of high amount of radiation. As radiation effects at low dose have not been well studied, it is believed that even a small amount of radiation produces hazardous effects. However, it might not be true. Beneficial effects of a low dose of radiation are summarized here

Storing Medical Records of A-Bomb Survivors on Optical Disks

Medical records of A-bomb survivors include numerical data and non-numerical data such as handwritten description. We have been storing the numerical data in medical records into a data base. We started to store the nonnumerical data on optical disks. We analyzed the significance and usefulness of storing them. The nonnumerical data of symptoms can not be evaluated by but can be analyzed with the numerical data. It was concluded that storing non-numerical data in the medical records on the optical disks would be worthy

Factors Determining Satisfaction with Daily Life of Elderly A-bomb Survivors

From the analysis of questionnaires to elderly A-bomb survivors of over 65 years old, we analysed factors which determined satisfaction with daily life. Analysed categories were housing condition, life style, occupational status, health condition and family status. From the analysis, to be an A-bomb survivor was not a factor for satisfaction with daily life, and it became clear that living in a rented room, not satisfying one\u27s job and low income were serious factors which kept elderly people from the satisfaction with daily life. It must be necessary to improve these factors for the satisfaction of elderly people

長崎市の飼い犬の飼育環境と人畜共通寄生虫，犬糸状虫の予防の実態に関するアンケート調査

犬糸状虫の感染と犬の飼育環境や飼い主の予防の実施の有無との関連性の手がかりをつかむため，1989年と1993年に長崎市の南部の戸町地区と北部の坂本，高尾，山里の3地区の320名または397名の飼い主を対象に犬の飼育環境と予防の実態についてアンケート調査を実施した．1989年と1993年の回収率はそれぞれ65.9％または55.9％であった．感染率の低い北部3 地区では家の中で犬を飼うと答えた人が多かった．感染率の高い南部の1地区では庭で犬を飼う人が多かった．このことから南部の犬は北部の犬に比べて主要伝搬蚊であるアカイエカに刺される機会が多くなることが推測される．予防措置としてはどの地区でも蚊取り線香が高頻度に使われていることがわかった．予防薬を投与している飼い主は一般に少なかった．To examine the role of living environments of domestic dogs and the measures taken by dogs owners to protect their dogs in the prevention of Dirofilaria immitis infection, we carried out a questionnaire survey in Tomachi (from the southern part of Nagasaki City) and Sakamoto, Takao and Yamazato (from the northern part of the same city) in 1989 (for 320 dog owners) and 1993 (for 397 owners). The percentage of dog owners who answered to the questionnaire was 65.9% in 1989 and 55.9% in 1993. In the northern 3 districts where positive rates the percentage of larvae-carrying dogs were low, dogs were often kept indoors. In the southern district (Tomachi) where the positive rate was high, dogs were often kept outdoors (in the yard). The high percentage of dogs kept outdoors in Tomachi seems to have increased the exposure of dogs to main vector mosquito, Cx. p. pallens. In all districts, mosquito-repellent coils were most frequently used as a means to control mosquitoes. The percentage of dog owners who used preventive drugs tended to be low

Death Rate of Survivors in Nagasaki at Early Time of A-Bomb Explosion

The death rate of survivors at early time after A-bomb explosion was analyzed with the A-bomb disaster survey in Nagasaki city. Survivors who were alive September 1st, 1945 was 20,746 persons, in which 17,869 persons (86.1%) had information for the analysis. The death rate in 1945 of survivors exposed in their houses at less than 1,199 m from the hypocenter was higher than those exposed not in their houses. The death rate of survivors in 1946 decreased rapidly, although that of survivors exposed at less than 1,199 m from the hypocenter was still high

A Case Report of Tooth Wear Associated with a Patient's Inappropriate Efforts to Reduce Oral Malodor Caused by Endodontic Lesion

Here, we report a case of severe tooth wear associated with a patient's inappropriate efforts to reduce oral malodor. A 72-year-old male patient visited our breath clinic complaining of strong breath odor. Former dentists had performed periodontal treatments including scaling and root planing, but his oral malodor did not decrease. His own subsequent breath odor-reducing efforts included daily use of lemons and vinegar to reduce or mask the odor, eating and chewing hard foods to clean his teeth, and extensive tooth brushing with a hard-bristled toothbrush. Oral malodor was detected in our breath clinic by several tests, including an organoleptic test, portable sulphide monitor, and gas chromatography. Although patient's oral hygiene and periodontal condition were not poor on presentation, his teeth showed heavy wear and hypersensitiving with an unfitted restoration on tooth 16. Radiographic examination of the tooth did not reveal endodontic lesion, but when the metal crown was removed, severe pus discharge and strong malodor were observed. When this was treated, his breath odor was improved. After dental treatment and oral hygiene instruction, no further tooth wear was observed; he was not concerned about breath odor thereafter

An Epidemiological Study of Senile Dementia at Home in Nagasaki

This paper reports the results of an epidemiological study of senile dementia with elderly people over 65 years old residing in Nagasaki City and rural districts of Nagasaki Prefecture and compares them to those of studies conducted in Japan. The prevalence rate of senile dementia at home in Nagasaki City is 2.88%, which is lower than that in the other areas. The prevalence rate of the rural districts in Nagasaki Prefecture is 4.3% and is close to the national average (4.38%). Looking at diagnostic classification of dementia, the ratio of multi-infarct dementia to the Alzheimer type is 0.93 in Nagasaki City and 0.61 in rural districts. They are lower than those in the other studies

Human Blood Feeding Activity of Female Hybrids between Culex pipiens pipiens and Culex pipiens quinquefasciatus（Diptera: Culicidae）

Human blood feeding activity was examined in females of hybrids between Culex pipiens pipiens and Culex pipiens quinquefasciatus during long photoperiod at 25℃. Blood feeding rates of hybrids were lower than in Culex pipiens quinquefasciatus and Culex pipiens pallens, and higher than in Culex pipiens pipiens, because no females fed on human blood in Culex pipiens pipiens