Valtonen M V
Infect Immun. 1977 Dec;18(3):574-82. doi: 10.1128/iai.18.3.574-582.1977.
The quality of lipopolysaccharide has previously been shown to influence the mouse virulence of Salmonella so that strains with O antigen 4,12 were more virulent than their O-9,12 sister strains. Immunosuppression did not alter this O-antigen-dependent difference in virulence. I have now constructed smooth O-4,12 and O-6,7 sister hybrid strains of Salmonella typhimurium. No other phenotypic differences were found between these strains; they were all "common antigen" positive. In intraperitoneal infection, the O-4,12 strains were more mouse virulent than their O-6,7 sisters. The difference in virulence correlated with a difference in clearance rates; the O-6,7 hybrids were removed from the blood more rapidly than their O-4,12 sisters. No natural bactericidal antibodies were found in the sera of the mice.
先前已表明脂多糖的质量会影响沙门氏菌对小鼠的毒力,使得具有O抗原4、12的菌株比其O-9、12的姊妹菌株毒力更强。免疫抑制并未改变这种毒力上的O抗原依赖性差异。我现在构建了鼠伤寒沙门氏菌的光滑O-4、12和O-6、7姊妹杂交菌株。这些菌株之间未发现其他表型差异;它们均为“共同抗原”阳性。在腹腔感染中,O-4、12菌株比其O-6、7姊妹菌株对小鼠的毒力更强。毒力差异与清除率差异相关;O-6、7杂交菌株比其O-4、12姊妹菌株从血液中清除得更快。在小鼠血清中未发现天然杀菌抗体。