A coloured scanning electron micrograph (SEM) of the head of a maggot or the larva of a bluebottle fly (Protophormia sp.) with tiny teeth-like fangs extending from its mouth. The maggots of this fly are used medicinally to clean wounds. The maggots are sterilised and placed in the wound, where they feed on dead tissue and leave healthy tissue untouched. Their saliva contains anti- bacterial chemicals which maintain sterility in the area. Maggots are used on ulcers and deep wounds away from organs or body cavities, most often being used to treat diabetic ulcers on the feet.
Coloured scanning electron micrograph of a cat flea (Ctenocephalides felis) amongst cat hairs.
Coloured scanning electron micrograph of a house dust mite (Dermatophagoides pteronyssinus). Millions of dust mites inhabit the home, feeding on shed skin cells. They mainly live in furniture, and are usually harmless. However, their excrement and dead bodies may cause allergic reactions in susceptible people
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