7Okamoto K. Properties and actions of heat-stable en- terotoxin of Escherichia coli [J]. J Nat Toxins,2000, 9(3) :213-229.
8Zhang W, Zhang C,Francis D H, et al. Genetic fusions of heat-labile (LT) and heat-stable (ST) toxoids of porcine enterotoxigenic Escherichia coil elicit neutral- izing anti-LT and anti-STa antibodies[J]. Infect Im- mun. 2010,78(1) : 316-325.
9Netty Z,Koen G,Carla D,et al. An improved conjuga- tion method for controlled covalent coupling of syn- thetic peptides to proteins using glutaraldehyde in a dialysis method[J]. Journal of Immunological Meth- ods, 1990,130 : 195-200.
10Frantz J C,Bhatnagar P K,Brown A L, et al. Investi- gation of synthetic Escherichia coli heat-stable enter- otoxin as an immunogen for swine and cattle[J]. In- fect Immure, 1987,55(5) : 1077-1084.