In fact only 1% of bacteria are harmful. Viruses can only grow inside the cells of living organisms. They are not living in their own and in that way are different to bacteria, parasites and fungi. All living organisms can contract viruses: humans, plants, fish and animals. Viruses are spread from host to host.
Viruses: A virus needs a host cell to replicate. Viruses are immune to antibiotics and are spread in the air or by direct contact, which mean they probably are more commonly caught from each other. They can lead to serious or sometimes deadly diseases such as aids. Virus can also cause chickenpox, common cold and influenza. Parasites: A parasite is an organism that lives in another organism.
Causes and Spread of Infection The differences between Bacteria, viruses, fungi and parasites are Bacteria are found everywhere ie, air, water, soil, animals, people and food. It is a single cell micro-organism that retrieves its nutrition from the environment. Bacteria can only be seen through a microscope. They are shaped like short rods, spheres or spirals. It is stated on www.biologyinfo.com that, “Not all bacteria are harmful.
Viruses are infectious agents, often highly host-specific, consisting of genetic material surrounded by a protein coat. Viruses are not alive, they cannot grow or multiply on their own and need to enter cell and take over the cell to help them multiply. Fungi – these are members of a large group of eukaryotic organisms that includes microorganisms such as yeast and molds, as well as the more familiar mushrooms. Fungi can be single-celled, multinucleated, or multicellular organisms. Although they are eukaryotes like plants and animals, the major difference is that fungal cells have cell walls that contain chitin, unlike the cell walls of plants, which contain cellulose.
Causes and spread of infection Understand the causes of infection Outcome 1 Identify the differences between bacteria, viruses, fungi and parasites All 4 are different types of pathogens Bacteria is a single celled organism that multiply by themselves. They live within and on most living and non-living things. The majority of bacteria are harmless and beneficial to the human body but some can cause infectious diseases. A bacterium usually affects one part of the body and doesn’t spread across or through the body. Bacterial infections are normally treated with a course of antibiotics.
Identify the differences between bacteria, viruses, fungi and parasites Answer: Bacteria Bacteria are single-cell microorganisms which generally exist in large numbers and are microscopic in size. Bacteria can be either beneficial (bacteria in the intestinal tract aid digestion and are part of the normal body flora) or can be the cause of disease (for example pneumonia, food poisoning or bacterial meningitis). Viruses A virus is an infectious agent which can only live and replicate inside organism cells. The main difference between viruses and bacteria is that they are unable to reproduce in food – they need a living host cell to replicate. They replicate by infecting and taking over the functions of the host cell.
Outcome 1 Understand the cause of infection 1.Identify the difference between bacteria, viruses, fungi and parasites. Bacteria Bacteria is a single celled organism, bacteria have evolved to thrive in almost any environment and can be found in almost any substance/surface and also in the human body, only 1% of bacteria is actually harmful. It's bad or infectious bacteria that cause illness as they rapidly reproduce and produce a toxin that kills or mutates cells, bacteria is also self sufficient. Viruses A virus is a small capsule that contains DNA or RNA, viruses, unlike bacteria are not self sufficient and need a host in order to reproduce I.E a human body. 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.
Outcome1 Understand the causes of infection 1.1 Baceria is living annd can multiply, bacteria can be difficult to destroy and can survive for long periods. Viruses are smaller than bacteria, theey can only multiply in living cells. Viruses are not living. Fungibis an organism which lives by fedding on other organisms. Parasites survive by feeding from its host.
Some of the most deadly diseases and devastating epidemics in human history have been caused by bacteria. Cholera Diphtheria Dysentery Plague Pneumonia Tuberculosis Typhoid Typhus VIRUSES A virus is a small infectious agent that replicates only inside the living cells of other organisms. Viruses can infect all types of life forms, from animals and plants to bacteria and archaea. The average virus is about one one-hundredth the size of the average bacterium. Most viruses are too small to be seen directly with an optical microscope.
Bacteria also live in symbiotic and parasitic relationships with plants and animals. A virus is a small infectious agent that replicates only inside the living cells of other organisms. Viruses can infect all types of life forms (animals, plants, bacteria). The average virus is about one one-hundredth the size of the average bacterium. Most viruses