Tj789
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In a book I read they are diseases caused by living organisms, doesn't mention anything about being able to transmit to people....so are they?
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Pidge Gunderson
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The whole point of an infectious disease is that they're caused by bacteria, fungi, viruses and parasites and you 'get' the disease from them - hence the 'infectious' bit. However, some infectious diseases can be passed from person to person whether it be through bites or exposure.

So, not all infectious diseases can be passed from person to person however all infectious diseases are 'infectious' (you caught them from bacteria, fungi, viruses or parasites).
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Tj789
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(Original post by Kyou)
The whole point of an infectious disease is that they're caused by bacteria, fungi, viruses and parasites and you 'get' the disease from them - hence the 'infectious' bit. However, some infectious diseases can be passed from person to person whether it be through bites or exposure.

So, not all infectious diseases can be passed from person to person however all infectious diseases are 'infectious' (you caught them from bacteria, fungi, viruses or parasites).
Tanx
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NatashaW93
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Most infectious diseases are transmittable between people. Also animals (known as zoonotic diseases).


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Synapsida
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When people say 'infectious', it means that the pathogens can transmit from one individual organism to another other. When the transmission occurs, it usually between two organism that are the same species because most organisms interact more with members of the same species then other species (unless your an apex predator that only interacts with your species when mating like Smilodon or you are an farmer). Also it is easier for pathogens to infect the nearby organism that belongs to the same species because it would probably face with the same or similar immune defences that the previous infected individual had hence increase it's chance of survival and potency for the host. This is especially true for pathogens like retro-viruses with need to hijack your genetic materials to multiply and needs to find an way to bind into your CT-4 receptors with attracting attention of lymphocytes.
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