prokaryotic microorganisms in their natural habitats - human body - summary

Question 1

give an example of beneficial bacteria in the human body

Answer 1

in the human vagina lactobacillus species bacteria maintains a pH of 3.5-4.5 which inhibits the growth of candida albicans which cannot grow in acid conditions. The use of antibiotics can cause the pH to become neutral allowing for the growth of candida albicans which cause thrush.
bacteroides fragilis, bacteroides vulgatus, and E.coli produce vitamin K which is essential for blood clotting in humans.

Question 2

give an example of detrimental bacteria in the human body.

Answer 2

mycobacterium tuberculosae > causes TB
meningicoccal species > causes meningitis
bordatella pertussis > causes whooping cough
Nesseria gonorrhoea > causes gonnorhoea
pseudomonas aeruginosa > causes skin and urinary tract infections.