关于乙型肝炎的传播途径,现已证明含有乙型肝炎抗原血液和其他各种血液制品,微量(10~(-7)毫升)即可引起感染,10~(-4)毫升即可发生临床症状。近年来的研究表明也可经各种体液和分泌物传播,如唾液、汗水、精液、母乳、羊水、腹水等。对吸血昆虫媒介已引起重视。我们于1979年夏对乙肝抗原HBsAg 携带者睡的床上采集温带臭虫用反向间接血凝法(RPHA)和 With regard to the transmission of hepatitis B, it has been proved that the blood containing hepatitis B antigen and various other blood products can cause infection in a small amount (10 -7 ml), and 10 -4 ml symptom. In recent years, studies have shown that it can also be transmitted through a variety of body fluids and secretions, such as saliva, sweat, semen, breast milk, amniotic fluid, ascites and so on. Vampire insect vectors have attracted attention. In the summer of 1979, we collected temperate bugs by reversed-indirect hemagglutination (RPHA) on bed of hepatitis B antigen-bearing HBsAg carriers and