Swine pox, which belongs to the pox disease complex, is caused by two antigenically different poxviruses . 豬痘屬于痘病群,是由兩種抗原上不同的痘病毒引起的。
The results suggested that human hscs can engraft into rat and differentiate into multilineage under certain microenvironment . thus , the human / rat xenograft model may provide a useful and convenient method for assay human hscs in vivo 新生大鼠免疫系統(tǒng)發(fā)育不完善,對異種抗原可形成免疫耐受,是很好的研究異種移植的實(shí)驗(yàn)動物,且經(jīng)濟(jì)。
Three types of influenza viruses are recognized : a , b and c . influenza a viruses are further categorized into subtypes on the basis of two surface antigens : haemagglutinin and neuraminidase 流感病毒共分甲乙丙型三種。甲型流感可依據(jù)病毒表面的血凝素haemagglutinin ,即h及神經(jīng)胺酸neuraminidase ,即n兩種抗原類型,再細(xì)分為不同的亞型。
Three types of influenza viruses are recognised : a , b and c . influenza a viruses are further categorised into subtypes on the basis of two surfaces antigens : haemagglutinin and neuraminidase 流感病毒共分甲乙丙型三種。甲型流感可依據(jù)病毒表面的血凝素haemagglutinin ,即h及神經(jīng)胺酸neuraminidase ,即n兩種抗原類型,再細(xì)分為不同的亞型。
A protein substance produced in the blood or tissues in response to a specific antigen , such as a bacterium or a toxin . antibodies destroy or weaken bacteria and neutralize organic poisons , thus forming the basis of immunity 抗體,免疫體血液或組織針對某種抗原如細(xì)菌或毒素而產(chǎn)生的蛋白質(zhì)物質(zhì)。抗體消滅細(xì)菌或削弱其作用,中和有機(jī)毒素,因而形成免疫力