Journal of the Japanese Association for Infectious Diseases

The author described some results of ecological studies on body lice, which he hadartificially bred and incubated. Namely, he observed their life cycle and several important habits, established unstained louse strains, and using them, determined the optimum coditions, especially temperature of incubation or blood-stinging intervals, to breed and maintain them.

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In 1967, 62 cases among 656 in-patients of diagnosed and suspected bacillary dysentery in our hospital, were determined to be acute enteric fever due to Salmonella. The majority of these cases occurred in children (56.7%), among which, infants between the age of 0 and 4 were indicated 79.3%.
As to the clinical manifestations, diarrhea was more predominant in infants, but gastroenteritis in adults.
Sixty-five strains (17 types) of Salmonella were isolated from the patients and the first leading type of isolates was S. typhi-murium, the second was S. heidelberg, and then S. oranienburg.
Twenty-five antibiotic resistant strains which belonged to 7 types, were obtained, amont them S. typhi-murium accounted for 56%, and all of which showed distinct resistancy to streptomycin and tetracycline in concentration of 100 mcg./ml. or more.
In our cases, the clinical and bacteriological investigations indicated that the antibiotic treatment had been less effective on clinical symptoms especially on removal of pathogenic bacilli in patient's feces, than the cases of bacillary dysentery.

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