Salivary biotypes of mutans Streptococci levels in schoolchildren aging 6-8 year old having a socioeconomic base


  • Denise Madalena Palomari Spolidorio Araraquara Dental School / UNESP
  • José Francisco Höfling Piracicaba Dental School / UNICAMP
  • Edvaldo Antônio Ribeiro Rosa
  • Cássio Vicente Pereira Lavras University Center
  • Daniella Moreira Dental Surgery , PhD.
  • Reginaldo Bruno Gonçalves Piracicaba Dental School / UNICAMP



Mutans Streptococci. Distribution. Children. Socioeconomic base


There is still little information on the mutans Streptococci biotypes in South America, specifically in Brazil, including regional and local information, associated to different socioeconomic categories. In this paper, the Streptococcus mutans levels and biotypes in Brazilian children aged 6-8 year old having a socioeconomic base was investigated. The sampling consisted of 200 selected children belonging to five different socioeconomic categories. Bacterial examination was made using children saliva diluted and cultivated in Bacitracin sucrose agar (SB-20). The plates were incubated by 48 hours/37ºC at 10% CO2 in anaerobiose and after colonies growth samples identification was performed by biochemical tests. Results showed that 78% of the 491 tested samples harbored S. mutans, followed by S. sobrinus (11.6%), S. rattus (4.69%), S. mutans V (2.65%), S. cricetus (1.83%) and S. ferus (1.22%). The prevalence of Streptococcus mutans was found in every socioeconomic level. Among children harboring multiple species, the most frequent association detected was S. mutans/ S. sobrinus (17%).


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Author Biographies

Denise Madalena Palomari Spolidorio, Araraquara Dental School / UNESP

Denise M. Palomari Spolidorio é graduada em Ciências Biológicas pela Pontifícia Universidade Católica de Campinas (1986) e obteve o título de Mestrado (1992) e Doutorado (1996) em Biologia Patologia Buco-Dental pela Universidade Estadual de Campinas - UNICAMP e Pós-Doutorado pela Universidade de Calgary, Canadá (2007). É Professor Adjunto do Departamento de Fisiologia e Patologia da Universidade Estadual Paulista Júlio de Mesquita Filho - UNESP, Pesquisador 1D do CNPq

José Francisco Höfling, Piracicaba Dental School / UNICAMP

graduate at História Natural das Ciências from Universidade Estadual Paulista Júlio de Mesquita Filho (1970), master's at Immunology from Universidade Estadual de Campinas (1974) and ph.d. at Immunology from Universidade Estadual de Campinas (1975). Has experience in Microbiology, focusing on Medical Microbiology, acting on the following subjects: streptococcus mutans, candida albicans, sds-page, crianças and streptococcus sobrinus.

Edvaldo Antônio Ribeiro Rosa

Edvaldo Antonio Ribeiro Rosa is pharmacist by the Methodist University of Piracicaba (1990), Master (1997) and Ph.D. (2000) by the State University of Campinas, with post-doctoral training at the University of Hong Kong (2007). Is Full Professor at the Pontifical Catholic University of Paraná, where teaches Basic and Oral Microbiology and Immunology for undergraduate, masters and doctorate. Was honorary assistant professor of the Faculty of Dentistry of the University of Hong Kong (2007). It is leading the research group registered at CNPq as "Xenobiotics Research Unit". His research interests focus on the influence of xenobiotics on the expression of virulence factors of pathogens and microbial biotransformation of xenobiotics

Cássio Vicente Pereira, Lavras University Center

graduate at Odontologia - Bacharelado from Universidade do Estado de Minas Gerais (1995), master's at Microbiologia e Imunologia from Faculdade de Odontologia de Piracicaba - UNICAMP (1998) and ph.d. at Microbiologia e Imunologia from Faculdade de Odontologia de Piracicaba - UNICAMP (2001). Has experience in Odontology, acting on the following subjects: mutans streptococci, cárie dentaria, açúcares, antimicrobianos and microbiologia pulpar.
(Text informed by the author)

Reginaldo Bruno Gonçalves, Piracicaba Dental School / UNICAMP

Professor Titular de microbiologia e imunologia da Faculdade de Odontologia da Universidade Estadual de Campinas e professor associado em Periodontia da Faculté de Medecine Dentaire, Université Laval, Québec, Canada. Possui graduação em Odontologia pela Universidade Estadual de Campinas (1987), especialização em Endodontia pela FOP-Unicamp (1989), mestrado em Biologia Patologia Buco-Dental pela Universidade Estadual de Campinas (1994) e doutorado em Ciências (Microbiologia) pela Universidade Federal do Rio de Janeiro com estagio no GREB-Universite Laval, Quebec, Canada (1998). Tem pós doutorado pelo Instituto Forsyth, Boston, EUA (2002-2005). 


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How to Cite

Spolidorio DMP, Höfling JF, Rosa EAR, Pereira CV, Moreira D, Gonçalves RB. Salivary biotypes of mutans Streptococci levels in schoolchildren aging 6-8 year old having a socioeconomic base. Braz. J. Oral Sci. [Internet]. 2015Nov.13 [cited 2022Jan.17];3(8):390-4. Available from:




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