Wang Y, Sun LP, Yuan Y. Susceptibility of Helicobacter pylori with diversified genotypes to allitridi.
Shijie Huaren Xiaohua Zazhi 2004;
12:2325-2328. [DOI:
10.11569/wcjd.v12.i10.2325]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To study the susceptibility of Helicobacter pylori strains with diversified genotypes to allitridi.
METHODS: Fifty-one strains of H. pylori were isolated and cultured from the fresh gastric mucosal specimens. CagA and vacA (s1, m1b, m2) genotypes of H. pylori were determined by PCR method. Minimal inhibitory concentrations (MICs) of allitridi on 51 H. pylori strains were determined by agar dilution methods. MIC50 was also calculated.
RESULTS: Fifty-one strains of H. pylori were satisfactorily susceptible to allitridi. The gross bacteriostatic rate of allitridi on 51 H. pylori strains was 92.2% (47/51), and MIC50 was 7.97 mg/L. MIC was in a range of 1.25 mg/L to 40 mg/L. H. pylori with vacAm1b+ genotype was more susceptible to allitridi than that with vacAm1b- genotype (relative median potential = 0.55, 95% credible range from 0.30 to 0.89). H. pylori with vacAm2+ genotype was more susceptible to allitridi than that with vacAm2- genotype (relative median potential= 0.67, 95% credible range from 0.44 to 0.98). H. pylori with cagA+ vacAs1+ m1b+, cagA+ vacAs1+ m2+ genotypes were more susceptible to allitridi than those with cagA+vacAs1-m1b- genotypes (relative median potential = 0.38/0.37, 95% Credible Range from 0.10 to 0.78/from 0.11 to 0.81).
CONCLUSION: H. pylori is satisfactorily susceptible to allitridi. The bacteriostatic effect increases with the concentration of allitridi. The MIC50 is 7.97 mg/L and MIC range between 1.25 mg/L and 40 mg/L. Diversified genotypes or genotype combinations of H. pylori show different susceptibilities to allitridi.
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