New serotype of mutans streptococci isolated from pig oral cavity |
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Authors: | Takada Kazuko Igarashi Mitsuhiko Yamaguchi Yasutaka Hirasawa Masatomo |
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Institution: | Department of Microbiology and Immunology, Nihon University School of Dentistry at Matsudo, Matsudo, Chiba 271-8587, Japan |
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Abstract: | Gram-positive streptococcal mutans-like strains, but with clearly different colony formation than S. orisuis on Mitis Salivarius agar, were isolated from the pig oral cavity and identified by 16S rRNA sequencing, G+C content, DNA-DNA homology and extensive biochemical and serological testing. The phenotypic data showed that the strains were similar to S. orisuis except for susceptibility to bacitracin. DNA-DNA homology between the isolates and S. orisuis was 72∼81%. However, serological data showed that they have a different sero-specific antigen from S. orisuis and other mutans streptococci. A new serotype, designated p, strains are classified in a serovar of S. orisuis, one of mutans streptococci. |
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Keywords: | Animal mutans streptococcus serotype Streptococcus orisuis |
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