Streptococcus mutans- An Overview

Streptococcus mutans

What is Streptococcus mutans? Streptococcus mutans is a Gram-positive coccus that is a major inhabitant of the oral cavity and is considered a significant contributor of tooth decay and cavities. Streptococci are spherical or ovoid cells, arranged in chains or pairs where many species are members of the commensal microflora on mucosal membranes of humans or animals, and some are …

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Streptococcus mitis- An Overview

Streptococcus mitis

What is Streptococcus mitis? Streptococcus mitis is a Gram-positive coccus belonging to the viridians group of Streptococci as well as the mitis group. It is a commensal organism that colonizes different areas of the human body like the oropharynx, skin, and gastrointestinal and genital tract as a part of the normal flora. It is an important species of the genus …

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Streptococcus anginosus- An Overview

Streptococcus anginosus

What is Streptococcus anginosus? Streptococcus anginosus is a Gram-positive bacterium that is present in the mouth, upper respiratory tract, gastrointestinal tract, and vagina as a normal inhabitant. S. anginosus belongs to the anginosus subgroup of viridans streptococci which was traditionally called the ‘milleri group’. However, the name is now pseudotaxonomic as the idea that all the members in the group …

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Streptococcus bovis- An Overview

Streptococcus bovis

What is Streptococcus bovis? Streptococcus bovis is a Gram-positive bacterium that belongs to the bovis/equinus complex of the viridans Streptococci. It is present in the gastrointestinal tract of humans as a normal inhabitant, along with other Streptococcus species. However, it is present in much fewer numbers than other such species. Previously S. equinus and S. bovis were considered as two …

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Streptococcus agalactiae- An Overview

Streptococcus agalactiae

What is Streptococcus agalactiae? Streptococcus agalactiae is a Gram-positive, non-motile, non-spore-forming coccus that is the only member of the Group B of the Lancefield antigen grouping. It is a β-hemolytic, catalase-negative, facultative anaerobe that consists of ten different serotypes, separated on the basis of the immunologic reactions of their capsular polysaccharide. Because it is the only species present in the …

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Hemolysis of Streptococci- Types and Examples with Images

Hemolysis of Streptococci- Types and Examples with Images

Introduction A genus Streptococcus is a heterogeneous group of Gram-positive bacteria. Various streptococci are considered as the normal microbial flora of animals and humans, while some species under favorable conditions can also cause diseases ranging from sub-acute infection to acute or even chronic diseases/infections. Streptococci are spherical organisms that grow in chains because of incomplete separation after the division of …

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Streptococcus Selective Agar

Streptococcus Selective Agar

Roantree et al introduced a medium for isolation of group A beta-hemolytic streptococci. The medium-enriched with yeast nucleic acid and maltose promoted increased colony size and enhanced clarity and sharpness of hemolytic zones produced by these organisms. Streptococcus Selective Agar is a selective medium recommended for use in the primary isolation of groups A Streptococcus species (S. pyogenes) from oral culture …

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20 Differences between Staphylococcus and Streptococcus

Staphylococcus and Streptococcus Differences

Staphylococcus and Streptococcus are Gram-positive and the two most common pathogenic cocci of medical importance. They are both non-motile, non-sporing, and facultative anaerobes which can be differentiated on the following grounds: S.N. Character Staphylococcus Streptococcus 1.       Cellular Arrangement Spherical cells in clusters (grape like clusters). Spherical or ovoid cells in chains or pairs. 2.       Fission/Division Irregular division in all three …

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Biochemical Test of Streptococcus canis

Biochemical Test of Streptococcus canis Basic Characteristics Properties (Streptococcus canis) CAMP Negative (-ve) Catalase Negative (-ve) Gram Staining Positive (+ve) OF (Oxidative-Fermentative) Facultative anaerobes Shape Cocci Urease Negative (-ve) VP (Voges Proskauer) Negative (-ve) Fermentation of Adonitol Negative (-ve) Arabinose Negative (-ve) Arabitol Negative (-ve) Arbutin Positive (+ve) Dulcitol Negative (-ve) Erythritol Negative (-ve) Fructose Positive (+ve) Galactose Positive (+ve) …

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Biochemical Test of Streptococcus mutans

Biochemical Test of Streptococcus mutans

Biochemical Test of Streptococcus mutans Basic Characteristics Properties (Streptococcus mutans) Capsule Capsulated Catalase Negative (-ve) Gram Staining Positive (+ve) Hemolysis Alfa Hemolysis Motility Non-motile OF (Oxidative-Fermentative) Facultative anaerobes Oxidase Negative (-ve) Shape Cocci Spore Non-sporing Urease Negative (-ve) VP (Voges Proskauer) Positive (+ve) Fermentation of Adonitol Negative (-ve) Arabinose Negative (-ve) Arbutin Positive (+ve) Cellobiose Positive (+ve) Dulcitol Negative (-ve) …

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