The protective effect of Clostridium novyi type B alpha-toxoid against challenge with spores in guinea pigs

被引:11
作者
Amimoto, K [1 ]
Sasaki, O [1 ]
Isogai, M [1 ]
Kitajima, T [1 ]
Oishi, E [1 ]
Okada, N [1 ]
Yasuhara, H [1 ]
机构
[1] Kyoto Biken Labs, Div Vet Microbiol, Kyoto 6110041, Japan
关键词
alpha-toxin; Clostridium novyi; protective effect; toxoid;
D O I
10.1292/jvms.60.681
中图分类号
S85 [动物医学(兽医学)];
学科分类号
0906 ;
摘要
Clostridium novyi (C. novyi) Type B alpha-toxin was purified from culture supernatant by column chromatography, and was inactivated by formalin. A purified alpha-toroid vaccine was prepared by mixing it with an aluminum phosphate gel adjuvant. Guinea pigs immunized twice with 4 mu g or more of alpha-toxin survived against challenge with C. novyi Type B spores. Anti-alpha-toxin (antitoxin) titer was measured by toxin neutralization test using Vero cells. All of the guinea pigs having antitoxin titers of 10 units (U) or more at challenge were survived. In another experiment, guinea pigs were immunized with crude alpha-toroid vaccines prepared by inactivated culture supernatant or by adding broken bacterial cells to the former. In this experiment, 10 U of antitoxin titer was the border of survival or death after challenge. Guinea pigs with antitoxin titers of less than 5 U, 5 U and 10 U died at 2, 3 to 4 and 4 days, respectively, after challenge. These results suggest that C. novyi alpha-toxin was the main protective antigen against challenge exposure to spores in guinea pigs.
引用
收藏
页码:681 / 685
页数:5
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