Antibiotics can usually kill them. An example of bacteria is meningitis and pneumonia. Fungi: A fungus is a spore producing organism that has no chlorophyll and can live as single celled yeast or as a larger multi-cellular mould. It will reproduce by spores. It will live by absorbing certain nutrients from any organic matter.
Fungi are also eukaryotic. The body consists of a network of threads called hyphae, forming a mycelium. There is a rigid cell wall made of chitin. In addition, feeding is heterotrophic which means that they are capable of utilising only organic materials as a source of food. Examples of fungi are Penicillium, yeast and mushrooms.
Outcome 1 Understand the causes of infection 1. Identify the differences between bacteria, viruses, fungi and parasites Bacteria are one-cell microorganisms with a single cellular organization, bacteria can reproduce from the life cycle and can be killed by antibiotics. Viruses are pieces of nucleic acid (DNA or RNA) wrapped in a thin coat of protein that replicate only within the cells of living hosts, viruses are smaller than bacteria and can’t be killed by antibiotics. Fungi are a member of a large group of eukaryotic organisms that includes microorganisms (eg. Moulds, yeasts), as well as more familiar mushrooms.
Outcome 3. 1. Describe procedures and systems relevant to the prevention and control of infection. 2. Explain the potential impact of an outbreak of infection on the individual and the organisation.
Changes in climate or introduction of a new species from elsewhere can greatly affect the balance of nature. Viruses: A virus is a small infectious agent that can replicate only inside the living cells of organisms. Most viruses are too small to be seen. Viruses infect all types of organisms, from animals and plants to bacteria . All viruses have genes made from either DNA or RNA, all have a protein coat that protects these genes; and some have an envelope of fat that surrounds them when they are outside a cell.
Cause and Spread of Infection 1. Understand the Causes of Infection 2.1 Identify the Differences Between Bacteria, Viruses, Fungi and Parasites Viruses are extremely small pieces of nucleic acid that are surrounded by a thin protein coat. They are different from other infectious microorganisms because they cannot replicate outside of a living host cell. They synthesize energy from their host cell and do not have a cell membrane, cell wall or cell nucleus. They have genes but lack a cellular structure.
1.1 Identify the differences between bacteria, viruses, fungi and parasites Bacteria are microscopic living organisms, usually one-celled, that can be found anywhere. Viruses are an infective agent that typically consists of a nucleic acid molecule in a protein coat and is able to multiply within living cells. Fungus is any member of the group of eukaryotic organisms which includes both unicellular microorganisms and multicellular fungi. Parasites are an organism that lives in or on another organism and benefits by deriving nutrients at the other's expense. 1.2 Identify common illnesses and infections caused by bacteria, viruses, fungi and parasites Bacteria commonly causes strep throat, urinary tract infections, tuberculosis, etc.
All of the following are polysaccharides except: q. Glucose 9. Only bacteria cells have cell wall r. False 10. Which of the following terms best describes an organism that cannot exist in the presence of oxygen s. Obligate anaerobe 11. A denatured protein maintains its: t. Primary structure 12. In which stage of the bacterial growth (growth curve), the growth rate is equal to death rate.
abscess or boil. 1.5 Identify poor practices that may lead to the spread of infection This could include not washing hands, not
Unit 20 – Causes and Spread of Infection 1.1 Identify the differences between bacteria, viruses, fungi and parasites. Bacteria are microbes with a single cell. There is no nucleus or membrane within bacteria, making its structure simpler than that of other organisms. Instead, the genetic information is contained in a single loop of DNA. Viruses are microscopic organisms consisting of genetic material surrounded by proteins, lipids, or glycoprotein coats.