Please enable JavaScript.
Coggle requires JavaScript to display documents.
Design practical (B.subtilis (Description:, First known as Vibrio subtilis…
Design practical
B.subtilis
-
First known as Vibrio subtilis, this bacterium was discovered by Christian Gottfried Ehrenberg in 1835. It was renamed in 1872 by Ferdinand Cohn.
Bacillus subtilis (B. subtilis) is a Gram-positive, aerobic bacterium. It is rod-shaped and catalase-positive.
-
-
B. subtilis is considered the best studied Gram-positive bacterium and a model organism in the study of bacterial chromosome replication and cell differentiation.
It is also known as hay bacillus, grass bacillus or Bacillus globigii.
The word bacillus refers to the shape of the bacteria (rod-shaped) and subtilis means slim, slender.
B. subtilis is often used as a probiotic preparation in the treatment or prevention of intestinal disorders. It is also used to produce antibiotics, as a fungicide, and in alternative medicine.
-
When stressed, B. subtilis transforms itself into a spore and enters a dormant state, allowing it to tolerate extreme environmental conditions.
B. subtilis holds the record for surviving in space for the longest duration, 6 years on a NASA satellite.
-
-
-
B. subtilis food poisoning has a rapid onset and with acute vomiting, commonly follow by diarrhoea.
-
E.coli
-
-
Escherichia coli (E. coli) is a gram-negative, facultative anaerobic, rod-shaped bacterium normally found in the intestines of intestine of humans and animals. Most strains are harmless and an important part of a healthy intestinal tract.
-
This bacteria is the best or most-studied free-living organism and has a record of 11 prestigious Nobel prizes associated with it.
-
It causes infection by producing Shiga toxins – how severe you suffer depends on the type of E.coli.
What makes E. coli remarkably dangerous is its very low infectious dose and how difficult it is to kill.
-
-
E. coli can be used to make useful substances, like human insulin, human growth factor, taxol and epidermal growth factor.
-
E. coli bacteria may give rise to infections in wounds, the urinary tract, biliary tract, and abdominal cavity.
It can cause septicaemia, neonatal meningitis, infantile gastroenteritis, tourist diarrhoea, and haemorrhagic diarrhoea.
-
Infections with this type of bacteria pose a serious threat to public health with outbreaks arising from food and water that has been contaminated with human or animal faeces or sewage.
-
-