Streptococcus alpha haemolyticus
Streptococcus viridans

An example of this would be Streptococcus viridans.

He died two months later, most likely of streptococcus viridans, which had entered his bloodstream, causing septicemia and ultimately the failure of his heart.

In cases of subacute bacterial endocarditis, the causative organism (streptococcus viridans) needs a previous heart valve disease to colonize and cause such disease.

S. pneumoniae can be differentiated from Streptococcus viridans, some of which are also alpha-hemolytic, using an optochin test, as S. pneumoniae is optochin-sensitive.

Streptococcus pneumoniae and a group of oral streptococci (Streptococcus viridans or viridans streptococci) display alpha hemolysis.

Streptococcus parasanguinis is a gram-positive bacteria of the genus Streptococcus that is classified as a member of the Streptococcus viridans group.

Other aerobic organisms are Klebsiella sp, Haemophilus influenza, Streptococcus viridans, Eikenella corrodens, Enterobacteriaceae, and salmonella sp.

Zinc Peroxide was, however, deemed ineffective against certain bacterial strains, such as Streptococcus viridans, staphylococcus aureus, E. coli, B. proteus, and B. pyocyoneus.

Bacterial keratitis is caused by Staphylococcus aureus, Streptococcus viridans, Escherichia coli, Enterococci, Pseudomonas, Nocardia and many other bacteria.

Optochin (or ethylhydrocupreine) is a chemical used in cell culture techniques for the presumptive identification of Streptococcus pneumoniae, which is optochin-sensitive, from other alpha-hemolytic streptococci such as Streptococcus viridans which are resistant.

Doctors identified Streptococcus viridans, which had probably leaked through damaged digestive tissue as a result of Farrar's severe diarrhea, as the source of the sepsis; however, they could not pinpoint the root cause of the gastrointestinal illness itself.

Streptococcus viridans is a pseudotaxonomic non-Linnean term for a large group of commensal streptococcal bacteria that are either α-hemolytic, producing a green coloration on blood agar plates (hence the name "viridans", from Latin "vĭrĭdis", green), or nonhemolytic.