Masakazu N Aoki

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Stipe lengths of sporophytes of Ecklonia cava Kjellman have been reported to be longer along the southeast than southwest coast of the Izu Peninsula, central Japan. Two bays in this region that have natural populations of E. cava, but with different stipe lengths, were chosen for transplant experiments to examine if stipe length was an environmentally(More)
To clarify the characteristics of the tuberculosis situation in Japan, it was analysed in comparison with those in other developed countries. The results are summarized as follows: 1. The tuberculosis epidemic peaked at the end of 1910s in Eastern Japan, and in the 1940s in Western Japan. It is estimated that the annual risk of tuberculosis infection was 4%(More)
The system of tuberculosis (TB) case-finding by mass miniature radiography (MMR) was established and expanded for almost all Japanese citizens in the 1950s. And, as stipulated by the TB Prevention Law, periodic mass screenings for schools, inhabitants, employees and institutions have been carried out. Among those aged over 25 years, the proportion of people(More)
To evaluate the usefulness of the COPD questionnaire of the International Primary Care Airways Group (IPAG) for screening the subjects with COPD in a given cohort, the questionnaires were given to subjects aged 40 or older, regardless of smoking habit at a general health check-up program in 4 institutions (Miyagi, Osaka, Okayama and Fukuoka) of the Japan(More)
In developed countries, the risk of tuberculosis infection is often less than 0.05%, and the majority of diseases is caused by remote infections, so that the ratio of incidence to risk of infection is now becoming bigger than that in developing countries. Surveillance on the trend of incidence, surveillance of tuberculosis group infections and surveillance(More)
In the previous paper (Kekkaku. 2004; 79: 509-518), the author has made a review on (1) development of droplet nuclei infection theory, (2) experimental basis and (3) epidemiological evidence of droplet nuclei infection, and has discussed about the factors influencing on tuberculosis infection. Various mode of transmission of tubercle bacilli from(More)
1. Outline of tuberculosis epidemiology after the World War II Tuberculosis was surprisingly highly prevalent during the World War 2nd in Japan, and it was reported that the incidence of TB was as high as 698.4 in 1951. Strong TB control program has been carried out throughout the country after the new Anti-TB Law had been enacted in 1951. TB incidence(More)