Seventy six cases of urticaria had been treated in our Allergy Centre during the period from July 15, 1954 to July 14, 1965. The results of clinical studies especially of the intracutaneous test are as follows;
1) As to the sexual distinction, on the whole, the number of the male was almost the same as that of the female (1: 1.05), but in the youth-prime generation the female was predominant in number, and the third decade was most frequent then the twenty decade.
2) Observing on the type of urticaria, 52.6% of the total cases belonged to the chronic type, and 25.0% were the acute.
3) 68.4 % of the 76 cases had the hereditary factor.
4) 63.2 % of the patients with acute type of urticaria and 32.5 % of those with chronic type of urticaria had food allergy, most frequently caused by fish (as mackerel, tunny, bonito and horse-mackerel) and smell-fish, and frequently by egg, cereal or vegetable, meat and milk.
5) The intracutaneous test by food allergen extracts was applied on each subject.
The frequency order of positive reaction was as follows: firstly as to fish and shell-fish group, lobster (23 %, the highest of all), tunny, bonito, crab, salmon, sardine, cuttlefish, and so on; secondly as to egg, meat and milk group, processed food (such as sausage or ham) and so on; and lastly as to cereal or vegetable group, positive reaction was caused
by cortinellus shiitake, bamboo-shoot, egg-plant, tomato, spinach, taro, coltsfoot and peanut. But the positive reaction to intracutaneous test of these substances, especially in chronic urticaria, was generally less notable than in bronchial asthma, and either false positive or false negative reaction was often seen.
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