Abstract. Lymphocytes from 150 unrelated individuals, 100 atopics and 50 lepers of the general population, mainly Mestizo, were tested for seven HL‐A antisera. The results found in the atopics showed a significant excess for HA‐7, and, taken as a whole, the distribution of HL‐A antigens was in this group more similar to the Caucasian component of the Mestizo population than to the Indians. In the case of leprosy, the results were significantly low for HL‐A2 and HL‐A3, but many of the samples from the lepers had an abnormal behaviour, with low vitality, that made its classification difficult.

Absrracr. Lymphocytes from 372 normal Mexican adults were tested for the presence of seven HL-A antigens, using specific cytotoxic antisera donated by the NIH. The results show a different pattern between the Mestizo and the Indian population particularly for HL-A2, HL-A5 and HL-A8. Among the three Indian groups there are also differences that are in relation with their racial origin.

The articles published by the Annals of Eugenics (1925–1954) have been made available online as an historical archive intended for scholarly use. The work of eugenicists was often pervaded by prejudice against racial, ethnic and disabled groups. The online publication of this material for scholarly research purposes is not an endorsement of those views nor a promotion of eugenics in any way.

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