Further, the use of Mosel agar also helped to isolate the bacteria. This lab report consists of the results obtained for the isolation process.
In this lab, the main objective was to isolateBacillus subtilis which is a gram-positive bacteria. The bacteria exist naturally in soil or vegetation; and within a mesophilic temperature range of 25-35 degrees Celsius. The bacterium has rod-shaped cells hence leading to the name bacillus. Usually, it leaves in harsh conditions, a situation leading to the formation of endospores which are stress resistant (Boone et al, 2001). The characteristics of the bacteria which allows for the uptake of of external DNA also provided a hint in isolating the microbe from its culture. The characteristics of the organism makes it significant to make use of gram staining and mosel agar to help in the isolation process. The following is the image showing Bacillus subtilis colony
The processed sample of the bacterium was treated through suspending it in a physiological saline for 15 minutes. The temperature for the treatment process was kept at 100 degrees Celsius to ensure that all the vegetative forms involved were all killed. The culture was then isolated in a nutrient agar. Gram staining method was then applied to guide in genus identification (Dworkin & Fulkow, 2006). The shape of the rods and extent was then examined from gram stains. Further , Mosel agar was used in isolating the individual colony. Glucose nitrate was also helpful idenfying the associated growth. The color of the growth was examined and recorded.
On performing gram staining, there was formation of slender rods and the realization of gram positive nature, to represent Bacillus subtilis. This helped in isolating the microbe from B. Cereus which assumed the shape of thick swollen rods.
The treatment under 100 degrees Celsius was useful in isolating the species from its vegetative forms since the bacteria itself