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  • Title: Immunochemical studies on the lipoteichoic acids of Bifidobacterium bifidum subsp. pennsylvanicum.
    Author: Op den Camp HJ, Peeters PA, Oosterhof A, Veerkamp JH.
    Journal: J Gen Microbiol; 1985 Mar; 131(3):661-8. PubMed ID: 2410545.
    Abstract:
    Antisera to lipoteichoic acid of Bifidobacterium bifidum subsp. pennsylvanicum were obtained by injecting lipoteichoic acid/methylated BSA complexes into rabbits. Precipitin tests showed that the glycerol phosphate backbone is primarily responsible for serological specificity while the polysaccharide part of the molecule plays a minor role. Whole cells of B. bifidum subsp. pennsylvanicum were capable of absorbing antibodies, indicating the presence of lipoteichoic acid (14% of the total content) at or near the bacterial surface. Cross-reactivity with strains of the genera Bifidobacterium and Lactobacillus was tested using absorption of antiserum by whole bacteria and reactivity of phenol extracts. The results indicated that lipoteichoic acid is a common antigen within the genus Bifidobacterium. The cross-reactivity with the lactobacilli tested was very low.
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