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  • Title: Monoclonal antibody against Leptospira interrogans serovar canicola.
    Author: Masuzawa T, Sekiguchi T, Shimizu T, Iwamoto Y, Morita T, Mifuchi I, Yanagihara Y.
    Journal: Chem Pharm Bull (Tokyo); 1989 Feb; 37(2):414-7. PubMed ID: 2743485.
    Abstract:
    Nine cell lines producing monoclonal antibodies (MAbs) against Leptospira interrogans serovar canicola strain Moulton were established by the cell fusion technique. The immunological reactivity of these MAbs with various kinds of serogroups, serovars and strains were examined by microscopic agglutination test (MAT) and enzyme-linked immunosorbent assay (ELISA). MAbs W1-W3 derived from mice, which were immunized with whole cells of the strain Moulton, reacted with the serogroups Canicola, Icterohaemorrhagiae and Pyrogenes. On the other hand, MAbs A1-A6 derived from mice immunized with the outer envelope (OE) fraction, which showed a potent protective activity and was extracted with ammonium hydroxide from the strain Moulton, reacted specifically with the serogroup Canicola alone in MAT. A difference in antigenic structure between subserogroup A (canicola subgroup) and subserogroups B (schüeffneri subgroup) of the serogroup Canicola was demonstrated by MAT using the MAbs. All the MAbs clearly agglutinated serovars of subserogroup A except for serovars kamituga, jonsis and bindjei, but did not react with any serovars of subserogroup B. These findings suggest that MAb highly specific to each serovar is readily available by OE immunization and is useful for the classification of Leptospira.
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