Berris B, Feinman S V, Sinclair J C, Wrobel D
Can Med Assoc J. 1978 Nov 4;119(9):1040-3.
Dentists were surveyed regarding a history of hepatitis and the presence in the blood of hepatitis B surface antigen (HBsAg) and antibody (anti-HBs) to determine whether they were at high risk of exposure to hepatitis B virus. Of 288 Canadian dentists 5.2% gave a history of hepatitis after graduation. This proportion is similar to that for 1462 Ontario dentists (6.3%) and that for 3162 accountants (5.1%) who had previously completed a mailed questionnaire. One dentist (0.3%) was HBsAg-positive and 42 (14.6%) were anti-HBs-positive. Of 210 healthy volunteer blood donors matched for age, sex and ethnic origin with the group of dentists none was HBsAg-positive and 2.9% significantly fewer (P less than 0.005), were anti-HBs-positive. Among Ontario blood donors 0.3% were HBsAg-positive and 3% were anti-HBs-positive. Thus, in Canada, dentists are not at increased risk of acquiring clinical hepatitis or becoming carriers, but they are more likely than other groups to have anti-HBs in the blood. Among dentists from outside Canada a higher proportion had a history of hepatitis (10.3%) and were HBsAg-positive (1.6%), but approximately the same proportion were anti-HBs-positive (15.9%).
对牙医进行了关于肝炎病史以及血液中乙肝表面抗原（HBsAg）和抗体（抗-HBs）的检测，以确定他们是否处于感染乙肝病毒的高风险中。在288名加拿大牙医中，5.2%的人表示毕业后有肝炎病史。这一比例与之前完成邮寄问卷调查的1462名安大略省牙医（6.3%）以及3162名会计师（5.1%）的比例相似。有一名牙医（0.3%）HBsAg呈阳性，42名（14.6%）抗-HBs呈阳性。在210名年龄、性别和种族与牙医组相匹配的健康志愿者献血者中，没有人HBsAg呈阳性，抗-HBs呈阳性的比例显著减少2.9%（P小于0.005）。在安大略省的献血者中，0.3%的人HBsAg呈阳性，3%的人抗-HBs呈阳性。因此，在加拿大，牙医感染临床肝炎或成为携带者的风险并未增加，但他们血液中抗-HBs的可能性比其他群体更高。在来自加拿大境外的牙医中，有更高比例的人有肝炎病史（10.3%）且HBsAg呈阳性（1.6%），但抗-HBs呈阳性的比例大致相同（15.9%）。
