maind
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« on: October 15, 2012, 03:33:36 pm » |
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Hi Lauren!
1. Most micro-organisms need most of the things you and I need to flourish and grow - moisture, warmth and a source of nutrition - some (usually the most dangerous such as those responsible for some types of gangrene) can do without oxygen (anaerobic bacteria). They need a mode of spread (usually the unwashed or poorly washed hands of people or badly cleaned equipment/facilities or badly stored food) and a vulnerable person to invade. 3. Common sources of infection include food, water, sick people (colds and flu or winter vomiting virus), animals and poor housing (invaded with pests such as rats and mice or damp and mouldy).
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