Bacteria are single celled organisms. These are different from animal and plant cells as they contain no nucleus.
The structure is made up of the following:
” Cell wall
” Plasma membrane
Types of bacteria and what they cause:
” Escherichia coli and Salmonella cause food poisoning.
” Helicobacter pylori cause gastritis and ulcers.
” Neisseria gonorrhea causes the sexually transmitted disease gonorrhea.
” Neisseria meningitides causes meningitis.
” Staphylococcus aureus causes a variety of infections in the body, including boils, cellulitis, abscesses, wound infections, toxic shock syndrome, pneumonia, and food poisoning.
” Streptococcal bacteria cause a variety of infections in the body, including pneumonia, meningitis, ear infections, and strep throat
Fungi contain a nucleus. These are non-photographic organisms meaning the cant photosynthesise. They don’t contain chlorophyll but instead contain Chitin, this can only be found in the walls of the fungi. They obtain nutrients from dead organic matter. These include Mushrooms, Yeast and Mould.
Types of Fungi and what they cause:
Caused by the fungus Aspergillus and usually occurs in people with lung diseases or weakened immune systems.
Caused by the yeast Candida. Candidiasis can occur in the mouth and throat, vagina, or the bloodstream.
C. neoformans infection
Caused by Cryptococcus neoformans, which can infect the brain (meningitis) in people with HIV/AIDS.
Caused by the fungus Blastomyces, which lives in moist soil in parts of the
A virus is a microorganism which can only replicate in a host organism. A virus can affect all organisms.
A virus consists of Nucleic acid and protein coat knows as Capsid.
Types of Virus:
o Flu (influenza)
o Human immunodeficiency virus (HIV/AIDS)
o Human papillomavirus (HPV)
o Infectious mononucleosis