Habitat of Bacillus cereus 5/5 (6)




Habitat of Bacillus cereus

  1. Bacillus cereus is isolated from soil, vegetables, milk, cereals, spices, fried rice, cooked poultry and meats, soups and desserts.
  2. It is also found in mashed potato, beef stew, apples, hot chocolates sold in vending machines and other improper food handling areas.
  3. In 1887, B. cereus was isolated from air in a cowshed by Frankland and Frankland.
  4. It is a saprophytic species of Bacillus.
  5. Vegetative cells and spores are widely distributed in nature.
  6. It is opportunistic pathogens to immunocompromised patients and sometimes pathogens of man.
  7. It is not considered as normal flora of humans but may be transiently colonize skin or the gastrointestinal or respiratory tracts.
  8. Endospores show much greater resistance to physical and chemical agents such as heat, cold, desiccation, radiation, disinfection, antibiotics and other toxins.
  9. It is able to grow either in the presence or in the absence of oxygen.
  10. It interacts with other microorganisms in the rhizosphere, the region surrounding plant roots.
  11. It is also found in the gut of microflora of invertebrates, and is an intestinal symbiont of arthropods where it exhibits filamentous growth in sow bugs, roaches and termites.
  12. Bacillus cereus are not easily killed by alcohol; in fact, they have been known to colonize distilled liquors and alcohol-soaked swabs and pads in numbers sufficient to cause infection.
  13. The presence of B. cereus in a patients stool is not sufficient to make a diagnosis of B. cereus because the bacteria may be present in normal stool specimens, a concentration of 105 bacteria or more per gram of food is considered diagnostic.

References

  1. Topley and Wilson’s Microbiology and Microbial Infection. Bacteriology Volume 2. Part IV. Organisms and their biology. Chapter 36. Bacillus cereus, 922.
  2. Bailey and Scott’s Diagnostic Microbiology. Part 3. Section 4. Chapter 18. Bacillus and Similar Organisms, 281.
  3. Mackie and McCartney Practical Medical Microbiology. Section B. Bacteria and Related Organisms. Chapter 17. Bacillus, 317.
  4. Ralph A. Slepecky and H. Ernest Hemphill. The Genus Bacillus—Nonmedical. Prokaryotes (2006) 4:530–562.
  5. Bacillus cereus. Mehrdad Tajkarimi. Materials from Maha Hajmeer.
  6. https://bioweb.uwlax.edu/bio203/s2013/salaba_jaco/habitat.htm
  7. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2863360/
  8. https://efoodalert.wordpress.com/2011/10/30/profiling-bacillus-cereus/
  9. https://microbewiki.kenyon.edu/index.php/Bacillus_cereus
  10. http://textbookofbacteriology.net/Bacillus_4.html
  11. http://www.foodsafety.gov/poisoning/causes/bacteriaviruses/bcereus/
  12. http://www.phac-aspc.gc.ca/lab-bio/res/psds-ftss/bacillus-cereus-eng.php
  13. http://www.antimicrobe.org/b82.asp
  14. https://efoodalert.wordpress.com/2011/10/30/profiling-bacillus-cereus/

Habitat of Bacillus cereus

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The Author

Sagar Aryal

Sagar Aryal

I am Sagar Aryal, a passionate Microbiologist and the Scientific Blogger. I did my Master's Degree in Medical Microbiology and currently working as a Lecturer at Department of Microbiology, St. Xavier's College, Kathmandu, Nepal. I am particularly interested in research related to Medical Microbiology and Virology.

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