Causes and Spread of Infection

Topics: Bacteria, Immune system, Virus Pages: 3 (850 words) Published: January 6, 2013
Causes and spread of infection

Identify the differences between bacteria, viruses, fungi, parasites? -Viruses aren't living. They're only made of complex proteins and nucleic acids. Bacteria, Fungi and Parasites are living organisms. - Bacteria are unicellular microorganisms. Fungi and Parasites are multicellular. - Fungi have cell walls made of chitin and they aren't animals. Parasites and bacteria are animals. Bacteria come in 3 main shapes; spherical which are known as cocci, rod shaped which are known as bacilli or vibrio, spiral which is known as spirilla or spirochetes. Bacteria is found in everything for e.g. soil, water, animals, plants, waste. The only place they aren’t found is where humans have sterilised.

Virus is a toxin or poison. It is a microscopic organism consisting of genetic material. They cannot reproduce without a host cell. When it gets this host cell, it takes over its functions. The cells then continue to reproduce, and reproduces more viral protein. Viruses can spread from person to person, and by exchange of salvia, coughing, sneezing.

Fungi are skin infections caused by dermatophytes and yeasts, which are groups of fungi that are normally harmless. When these grow excessively, it causes symptoms and usually affects your skin because they live of keratin. Fungi infections can also be caused by antibiotics, pregnant, poorly controlled diabetes, weak immune system.

A parasite lives in close relationship another organism, its host and it causes harm. Viruses are common parasites. Parasites has to be in its host to live, grow and multiply. Identify common illnesses and infections caused by bacteria, viruses, fungi and parasites

Bacterial Infection and illnesses:- Antrax, Bacterial meningitis, Gonorrhea, Plague, MRSA Infection, Tetanus, Tuberculosis. They can cause illnesses like tuberculosis, tonsillitis, and laryngitis and food poisoning. Viral Infections and illnesses- AIDS, Hand foot and mouth disease, Chickenpox, Mumps,...
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