| 1. | Nowadays , at least 6 different agents have been identified , namely hepatitis a , b , c , d , e and g virus . hepatitis a and e are spread by the faeco - oral route while hepatitis b , c , d and g are transmitted parenterally
现今已鉴别出最少有六种不同的病毒，分别为甲、乙、丙、丁、戊、庚型。甲型和戊型肝炎是经由肠道传染，而乙、丙、丁、庚型肝炎则是由血液途径传染。 |
