Bacillus Cereus Colony 2-1

 

 

Bacillus cereus is a  gram-positive aerobic bacteria that is motile. This off-yellow bacteria is known for causing food poisoning and eye infections, giving rise to non-gastrointestinal infections. It can be found in several different environments due to its ability to live in extremely warm, dry, cold, and radiated condtions.

References: 

Bottone, EJ. Bacillus cereus, a Volatile Human Pathogen. Clinical Microbiology Reviews. 2010 [accessed 2017 Mar 30];23(2):382–398.

 

Date collected: February 9, 2017  

 

   Methods

 

  • Soil was collected from a site at Lancer Park (Fig. 1). A shovel was used to gather the soil from varying depths, ( 0, 6, and 12 inches), before being placed in a sterile tube. It was then  spread on an agar plate. The bacteria were allowed to proliferate at room temperature (23 C) for 18-24 hours. A yellow colony was selected for 16S  rRNA gene sequencing via PCR amplification (Fig. 2). The products were then digested with MspI and sequenced for identification.

 

 

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Fig. 1. Site of soil sample collections

 

 

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Figure 2: Colony Identified from Sample

                                                                

  Results

 

PCR amplification and MspI Digest

  • A 1,512 bp PCR product was amplified by PCR. Once digested with MspI, four bands were identified: 150 bp, 200 bp, 450 bp, and 700 bp (Fig.3).

 

mspinew

 

Figure 3: PCR amplification and MspI Digest

 

Sequencing Analysis:


Figure 4: Sequence Analysis of Colony 2-1 

 

Contributions by:

Juwairyah Gunter, Christina Bell, BIOL 250 Spring 2017, Group 2