Oh type - Oh sex type

Japanese: Oh 型 - おーえっちがた
Oh type - Oh sex type

...This can be due to genetic causes (mutation type) or acquired environmental factors (disease, etc.). Typical examples of the former are B m type, O h type (commonly known as Bombay type), and cis A 2 B 3 type, while an example of the latter is the acquisition of "B-like antigens" in type A rectal cancer and uterine cancer patients (who acquire B-like antigens temporarily during the course of the disease and appear to be type AB). Type B m (1 in 5,000 to 6,000 people) has B antigens in their red blood cells, but because they are extremely weak, they cannot be detected by routine tests and are easily mistaken for type O (the name m was given to them after the word monkey because their reaction is similar to that of the blood cells of macaque monkeys).

*Some of the terminology explanations that mention "Oh type" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…これには遺伝的な原因によるもの(変異型)と後天的な環境(病気など)によるものとがある。前者の定型例としてBm型,Oh型(通称ボンベイ型),シスA2B3型があり,後者の例としてA型の直腸癌・子宮癌患者における〈B様抗原〉の獲得(病気の経過中にB様抗原を一時的に獲得してAB型にみえる)があげられる。Bm型(5000~6000人に1人)は,B抗原を赤血球にもっているのに,それが極端に弱いため日常の検査法では証明できずにO型とみまちがわれやすい(マカク類のサルの血球と同じような反応態度であることからmonkeyにちなんでmという名称が与えられた)。…

※「Oh 型」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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