Verna-Latin-The spring season. A great name for the dog that you adopt in the spring time. Vespera-Latin-The evening star. This girl dog is at her best in the evening. Virginia-Latin-A lady who is pure and virginal.
Mannitol Salt Agar (MSA) is a selective and differential medium. The high concentration of salt (7.5%) selects for members of the genus Staphylococcus, since they can tolerate high saline levels.
The MSA will select for organisms such as Staphylococcus species which can live in areas of high salt concentration (plate on the left in the picture below). This is in contrast to Streptococcus species, whose growth is selected against by this high salt agar (plate on the right in the picture below).