Infectious Diseases
A communicable disease is an illness agentd by micro-organisms. It is transmitted from an septic animal or person to another person or animal. It is also called a contagious disease.
Not all microbes can stupefy disease. The ones that can are called pathogens. Pathogens have developed to infect the bodys tissues, where they spue and cause damage. Various types of bacteria, viruses, fungi and protozoa can cause disease.
Pathogens
Bacteria
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Virus
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Fungus
Protozoa
Note: Amoebic Dysentry causes severe diarrhoea and in severe cases, liver damage. It outspreads by contaminated water and food. It can be treated, nevertheless re-infection can occur if water supply isnt kept clean.
Trypanosomiasis or sleeping sickness is found inly in Africa and is spread by the bite of a teensy-weensy insect called tsetse fly. Months later, the infected person starts showing symptoms, including a rash, fever, severe headaches and extreme tiredness. If not treated, the protozoa can cause death as it attacks the key nervous system.
Bacteria
Bacteria (singular: bacterium) are a major group of microscope organisms.
The represent bacterium was introduced in 1828, derived from the Greek word meaning small stick. Bacteria are prokaryotes, which mean that they have no true nucleus. Most bacteria are benign (good) or beneficial, and only a few are pathogens (harmful). In a bacteriums natural environment, nutrients are limited, meaning that bacteria cannot continue to disgorge indefinitely. There are many ways for bacteria to spread including direct contact, indirect contact, droplet...
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