Vasa vasorum are small blood vessels that comprise a vascular network supplying the walls of large blood vessels, such as elastic arteries (e.g., the aorta) and large veins (e.g., the venae cavae).
The name derives from Latin 'the vessels of the vessels'. Occasionally two different singular forms are seen: vasa vasis (from Latin 'the vessels of a vessel') and vas vasis (from Latin 'a vessel of a vessel').
https://en.wikipedia.org/wiki/Vasa_vasorum
A caries vaccine is a vaccine to prevent and protect against tooth decay.[1] Streptococcus mutans (S. mutans) has been identified as the major etiological agent of human dental caries. The development of a vaccine for tooth decay has been under investigation since the 1970s. In 1972, a caries vaccine was said to be in animal testing in England, and that it would have begun human testing soon.[2] However, intrinsic difficulties in developing it, coupled with lack of strong economic interests, are the reasons why still no such vaccine is commercially available today. Several types of vaccines are being developed at research centres, with some kind of caries vaccines being considered to diminish or prevent dental caries' impact on young people.[3]
https://en.wikipedia.org/wiki/Caries_vaccine
Streptococcus mutans is a facultatively anaerobic, gram-positive coccus (round bacterium) commonly found in the human oral cavity and is a significant contributor to tooth decay.[1][2] It is part of the "streptococci" (plural, non-italic lowercase), an informal general name for all species in the genus Streptococcus. The microbe was first described by James Kilian Clarke in 1924.[3]
This bacterium, along with the closely related species Streptococcus sobrinus, can cohabit the mouth: Both contribute to oral disease, and the expense of differentiating them in laboratory testing is often not clinically necessary. Therefore, for clinical purposes they are often considered together as a group, called the mutans streptococci (plural, non-italic due to its being an informal group name).[4] This grouping of similar bacteria with similar tropism can also be seen in the viridans streptococci, another group of Streptococcus species.
https://en.wikipedia.org/wiki/Streptococcus_mutans
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