Streptococcus mutans isolated from a 4‐year‐old girl diagnosed with infective endocarditis
Abstract Objectives Infective endocarditis (IE) has an extremely high fatality rate. In this study, we isolated a strain of Streptococcus mutans, which we called HM, from the blood drawn from a 4‐year‐old girl diagnosed with IE. We aimed to fully type the HM strain and investigate its biological pro...
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doaj-0163f7a2e64147c69db73a1da56fe6e62020-11-24T21:58:26ZengWileyClinical and Experimental Dental Research2057-43472019-10-015553454010.1002/cre2.220Streptococcus mutans isolated from a 4‐year‐old girl diagnosed with infective endocarditisYoshio Kondo0Tomonori Hoshino1Midori Ogawa2Kiyoshi Hidaka3Tomoyuki Hasuwa4Hiroyuki Moriuchi5Taku Fujiwara6Department of Paediatric Dentistry Nagasaki University Graduate School of Biomedical Sciences Nagasaki JapanDepartment of Paediatric Dentistry Nagasaki University Graduate School of Biomedical Sciences Nagasaki JapanDepartment of Microbiology, School of Medicine University of Occupational and Environmental Health Japan Kitakyushu JapanDepartment of Paediatric Dentistry Nagasaki University Graduate School of Biomedical Sciences Nagasaki JapanDepartment of Paediatrics Nagasaki University Graduate School of Biochemical Sciences Nagasaki JapanDepartment of Paediatrics Nagasaki University Graduate School of Biochemical Sciences Nagasaki JapanDepartment of Paediatric Dentistry Nagasaki University Graduate School of Biomedical Sciences Nagasaki JapanAbstract Objectives Infective endocarditis (IE) has an extremely high fatality rate. In this study, we isolated a strain of Streptococcus mutans, which we called HM, from the blood drawn from a 4‐year‐old girl diagnosed with IE. We aimed to fully type the HM strain and investigate its biological properties, including its virulence with respect to IE. Material and methods A 16S rRNA phylogenetic tree and glucosyltransferase gene sequences were used to type HM. Serotyping was performed using the Ouchterlony method. Morphological observations were made using phase contrast and electron microscopy. Fibrinogen adhesion and biofilm formation were investigated to examine the tissue colonization properties of HM, whereas its bodily origin was determined from its fingerprinting pattern. Results The isolated strain was S. mutans serotype e. However, its morphology was observed to be short chains, unlike that of the NCTC 10449 reference strain. Fibrinogen adhesion and biofilm formation were more apparent than in NCTC 10449. The fingerprinting pattern showed that HM came from the patient's saliva. Conclusions HM differs from NCTC 10449 in its higher fibrinogen affinity. HM was also found to be derived from the oral cavity. These results highlight the importance of good oral hygiene for the prevention of IE in children.https://doi.org/10.1002/cre2.220biofilminfective endocarditisStreptococcus mutans |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Yoshio Kondo Tomonori Hoshino Midori Ogawa Kiyoshi Hidaka Tomoyuki Hasuwa Hiroyuki Moriuchi Taku Fujiwara |
spellingShingle |
Yoshio Kondo Tomonori Hoshino Midori Ogawa Kiyoshi Hidaka Tomoyuki Hasuwa Hiroyuki Moriuchi Taku Fujiwara Streptococcus mutans isolated from a 4‐year‐old girl diagnosed with infective endocarditis Clinical and Experimental Dental Research biofilm infective endocarditis Streptococcus mutans |
author_facet |
Yoshio Kondo Tomonori Hoshino Midori Ogawa Kiyoshi Hidaka Tomoyuki Hasuwa Hiroyuki Moriuchi Taku Fujiwara |
author_sort |
Yoshio Kondo |
title |
Streptococcus mutans isolated from a 4‐year‐old girl diagnosed with infective endocarditis |
title_short |
Streptococcus mutans isolated from a 4‐year‐old girl diagnosed with infective endocarditis |
title_full |
Streptococcus mutans isolated from a 4‐year‐old girl diagnosed with infective endocarditis |
title_fullStr |
Streptococcus mutans isolated from a 4‐year‐old girl diagnosed with infective endocarditis |
title_full_unstemmed |
Streptococcus mutans isolated from a 4‐year‐old girl diagnosed with infective endocarditis |
title_sort |
streptococcus mutans isolated from a 4‐year‐old girl diagnosed with infective endocarditis |
publisher |
Wiley |
series |
Clinical and Experimental Dental Research |
issn |
2057-4347 |
publishDate |
2019-10-01 |
description |
Abstract Objectives Infective endocarditis (IE) has an extremely high fatality rate. In this study, we isolated a strain of Streptococcus mutans, which we called HM, from the blood drawn from a 4‐year‐old girl diagnosed with IE. We aimed to fully type the HM strain and investigate its biological properties, including its virulence with respect to IE. Material and methods A 16S rRNA phylogenetic tree and glucosyltransferase gene sequences were used to type HM. Serotyping was performed using the Ouchterlony method. Morphological observations were made using phase contrast and electron microscopy. Fibrinogen adhesion and biofilm formation were investigated to examine the tissue colonization properties of HM, whereas its bodily origin was determined from its fingerprinting pattern. Results The isolated strain was S. mutans serotype e. However, its morphology was observed to be short chains, unlike that of the NCTC 10449 reference strain. Fibrinogen adhesion and biofilm formation were more apparent than in NCTC 10449. The fingerprinting pattern showed that HM came from the patient's saliva. Conclusions HM differs from NCTC 10449 in its higher fibrinogen affinity. HM was also found to be derived from the oral cavity. These results highlight the importance of good oral hygiene for the prevention of IE in children. |
topic |
biofilm infective endocarditis Streptococcus mutans |
url |
https://doi.org/10.1002/cre2.220 |
work_keys_str_mv |
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