<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31402721</termId><termName>AIDS</termName><termType>PT</termType><termNote><![CDATA[ An acquired defect of cellular immunity associated with infection by species of human immunodeficiency viruses. Criteria as defined by the CDC in 1993 include a CD4-positive T-lymphocyte count under 200 cells/microliter or less than 14% of total lymphocytes, and increased susceptibility to opportunistic infections and malignant neoplasms. Clinical manifestations also include emaciation and dementia.  ]]></termNote><termCreatedDate>2026-03-30 20:48:18</termCreatedDate><relation><relationType>UF</relationType><termId>31402722</termId><termName>acquired immunodeficiency syndrome</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31361567</termId><termName>communicable disease</termName><termType>PT</termType></relation></term>  </Zthes>