| 28 January 2005 |
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Know more about 'Red fire ant'
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Red fire ant
Red fire ant (Solenopsis invicta Buren) are small ants native to South America. These small common-looking insects are dispersed to other parts of the world through commercial activities and shipments of farm products. They were introduced to southern regions of the USA in the 1920's, Australia in 2001, and Taiwan in 2003. In late 2004, Red fire ants were discovered in Guangdong.
Symptoms of Red fire ant sting
Red fire ants are very aggressive and readily attack anything that disturb them. Unlike bees, these ants can sting repeatedly. Human body stung by red fire ants will develop painful, burning and itching sensation, which can last for hours. The ants are thus named as fire ants. A red swelling with a small blister will form at the site of each sting and the wound will heal in 10-14 days. The blisters are prone to secondary bacteria infection if broken. On rare occasions, red fire ant stings can cause severe acute allergic reaction which can be fatal.
Management
The general public is advised to observe the following if stung by red fire ants:
- Apply a cold compress to the skin to relieve the swelling and pain
- Gently wash the affected areas with soap and water and leave the blisters intact
- Do not scratch the blisters
- Seek medical advice if deemed necessary. However, in case of the following situations, the patient should seek immediate help from the emergency room:
- The patient has a history of allergy to insects; or
- The patient develops symptoms of rapid onset of flushing, general hives, swelling of the face, eyes or throat, chest pain, nausea, severe sweating, breathing difficulties and faintness.
Prevention
1. Avoid contact with any ants.
2. When purchasing plants, check the plant for any signs of red fire ants infestation.
3. Avoid purchasing or importing any potted plants or vegetation into Hong Kong when travelling overseas.
4. Do not attempt to clear the infestation yourself if you discover any anthill or small mound of dirt with swarms of active ants nearby. Please report the infestation to the Plant and Pesticides Regulatory Division of the Agriculture, Fisheries and Conservation Department at 2150 7000.
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