Assignment

Tests used to identify Gram Positive Bacteria Mannitol Salt Agar (MSA) This type of medium is both selective and differential. 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 … Read more

Complete Lab 1: Collect your plates from the trays on the side bench. Observe the TSA plates for colonies of various sizes, shapes and colors. Each bacterial or fungal species gives a characteristic colony color and morphology. Draw the colonies observed on both TSA plates in the spaces provided in the Results section of Lab … Read more

UBIQUITY OF MICROORGANISMS Microorganisms are ubiquitous; that is, they are present nearly everywhere. In this lab you will try to isolate bacteria and other microorganisms from various sources using different types of media. TERMS AND DEFINITIONS Culture media (medium, singular): solution of nutrients required for the growth of bacteria. Agar: a carbohydrate derived from seaweed … Read more