Bacillus simplex

Bacillus simplex is a light orange, circular bacterial colony that can be found in the Buffalo Creek soil.


  1. Priest FG, Goodfellow M, Todd C. A numerical classification of the genus Bacillus. J Gen Microbiol. 1988. 134(7): 1847-82.

Date Collected: February 8, 2017

Methods for Isolation and Identification:

  • A soil sample was taken from the bottom of the Buffalo Creek (Figure 1). 100μl of the sample was placed on an agar plate and was incubated at 25 degrees Celsius for 48 hours. The plate was parafilmed and placed in the refrigerator for seven days.
  • A light orange, circular colony (Figure 2) was selected for 16S rRNA gene sequencing by PCR amplification.
  • The PCR product was sent for DNA sequencing to identify the species of the bacteria.

Buffalo Creek

Figure 1. site of collection (Buffalo Creek)

Bacillus simplex

Figure 2. Selected colony for identification


  • Msp1 digestion (figure 3): A light band was produced at 750 bp by PCR.

HMX2 Gel

Figure 3. Gel electrophoresis results of Buffalo Creek soil PCR product and + MSP1.

  • DNA sequence: The sequenced PCR product produced 982 quality base pairs that were used to identify the bacteria as Bacillus simplex. The chromatogram of the sequence is available as a pdf (HMX2_PREMIX_JF7559_28). NCBI BLAST revealed 100% similarity with 0 gaps out of 982 base pairs (Figure 4).

Bacillus simplex BLAST

Figure 4. NCBI BLAST results of chosen colony.

Contributed by: Megan Bland and Hannah Hatke, BIOL 250 Spring 2017