Study on BALB/c mice by immunization with genetic engineering vaccines of enterohaemorrhagic Escherichia coil O157:117
- VernacularTitle:肠出血性大肠杆菌O157:H7基因工程疫苗免疫小鼠的实验研究
- Author:
Jianping CHENG
;
Quanming ZOU
;
Xuhu MAO
;
Yong YI
;
Qingxu WANG
;
Ying MA
- Publication Type:Journal Article
- Keywords:
Enterohaemorrhagie Escherichia coil O157: H7;
Intimin;
Shiga toxin 2B;
EHEC tox-in;
Genetic engineering vaccine
- From:
Chinese Journal of Microbiology and Immunology
2008;28(9):828-832
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate immunoprophylactic potential of genetic engineering vaccines of enterohaemorrhagie Escherichia coli O157:H7 in BALB/c mice after immunization with these vaccines. Methods Sixty BALB/c mice (3 weeks old) were randomized averagely into 5 groups. Group 1-3 were im-munized respectively with IntiminC300, Stx2B and HIyAN436, group 4 with a combination of these three vaccines, and group 5 with PBS. Each mouse was immunized with vaccine(100 μg)and Al(OH)3 adjuvant (100 μg) for 3 times. After 7 d of the second and third immunization, serum of each mouse was collected and the different antibodies were detected. After 10 d of the last immunization, all mice were given drinking water containing streptomycin for 3 d before and following oral challenge with O157:H7 (109 CFU), and treated with clinical, microbiological and pathological examination. Results The three vaccines elicited high titer antiserum, and some mice were died after infection with O157. The livability of group 1-4 was re-spectively 73%, 64%, 36% and 91%. And these vaccines depressed fecal and colon shedding with O157. Condusion IntiminC300, Stx2B and HIyAN436 have certain protective efficacy for infection of O157, and combined immunization was more effective than single vaccine.
