Unit 4222-265 Causes and spread of infection (ICO2) Assessment Criteria 1.1 - Identify the differences between bacteria, viruses, fungi and parasites Bacteria: Bacteria is a living, but neither animal nor plant, it is a one cell organism without a nucleus. There are millions of species of bacteria. It is able to reproduce, and can quickly spread to millions of cells. When this happens it will continue to reproduce until its foods runs out, another species is introduced or competitor, or when a change happens in the climate to affect the balance of nature. E.g.
They can lead to serious or sometimes deadly diseases, such as AIDS. Parasites: Parasite: parasite is an organism that lives on or inside another organism to the detriment of the host organism. These are of various forms and types. A parasite is an organism that lives on or in a host and gets its food from or at the expense of its host. Parasites can cause disease in humans.
Most viruses are too small to be seen directly with a light microscope, All viruses have genes made from either DNA or RNA, When a virus enters the body, it enters some certain cells and takes over making the now host cell make the parts the virus needs to reproduce, the cells are eventually destroyed through this process. The most common viruses is the common cold, which has no cure. Fungi Mould, yeast and mushrooms are all types of Fungi, Fungi lives in the air, water, soil and on plants it can also live in the body, usually without causing illness. Some fungi have beneficial uses. For example, penicillin.
Causes and spread of infection (ICO2) Q Identify the differences between bacteria, viruses, fungi and parasites. (ICO2 1.1) Bacteria: Bacteria are living things that are neither plants nor animals, but belong to a group all by themselves. They are very small--individually not more than one single cell--however there are normally millions of them together, for they can multiply really fast.Bacteria are prokaryotes (single cells that do not contain a nucleus). Every species has a great ability to produce offspring and its population expands until it runs out of food or it is limited by competition, its own waste products, or some other factor. Changes in climate or introduction of a new species from elsewhere can greatly affect the balance of nature.
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.
They are single cell living micro-organisms. They live in groups of millions and multiply extremely fast, especially in warm temperatures. Bacteria is harmful to humans when it enters somewhere it shouldn't, this causes an infection such as food poisoning, diarrhoea, and legionaries disease. Viruses are small infectious agents that only live inside the cells of living things, in humans, animals and plants, a virus cannot reproduce. Viruses are harmful to humans because they infect the body tissue and cause infections such as the flu, norovirus and whooping cough.
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.
Viruses are microscopic organisms consisting of genetic material surrounded by proteins, lipids, or glycoprotein coats. Fungi can be multicellular or single celled organisms. They can be found in almost any habitat but most live on land. A group of fungi called the decomposers grow in the soil and play an important role in the cycling of carbon and other elements. A Parasite is an organism that lives within another organism (the host).
CU254- Causes and spread of infection 1.1 Bacteria- single celled organism essential for all life, parasites or live independently. They multiply themselves by cell division. Antibiotics can usually kill them. Examples of this is meningitis/ pneumonia Virus- Microscopically small and simplest micro biological. It is not an independent living organism it needs a host to replicate.
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.