Clinician Alert: Red Imported Fire Ants Detected in Sydney

A red imported fire ant nest has been detected and treated at the Enfield Intermodal Logistics Centre in Sydney’s inner west. While surveillance has not identified any additional nests and the likelihood of fire ant-related presentations is currently considered low, NSW Health is encouraging clinicians to remain vigilant and aware of reporting requirements.

Recognising possible fire ant stings

Red imported fire ants (Solenopsis invicta) are aggressive and may swarm when disturbed. A person can receive tens to hundreds of painful stings within seconds, with each ant capable of stinging repeatedly. Being stung only once or twice is considered unlikely.

Consider fire ant stings in patients who report:

• Multiple simultaneous, intensely painful stings after disturbing ants.
• Exposure to ants in an area where fire ants may be present.
• Numerous sting sites occurring at the same time.

Management

Clinical management should be guided by the patient’s presentation.

Local reactions

• Wash with soap and cool water.
• Apply a cold compress or ice.
• Provide simple analgesia.
• Keep blisters intact and advise patients to avoid scratching.
• Consider an antihistamine for minor localised reactions or itching.

Large local reactions

• Consider topical or oral corticosteroids.

Anaphylaxis

• Administer intramuscular adrenaline immediately.
• Call an ambulance.
• Arrange urgent transfer to hospital in accordance with standard anaphylaxis protocols.

Additional clinical advice is available from the Poisons Information Centre on 13 11 26.

Reporting requirements

Under the Biosecurity Act 2015, medical practitioners must immediately report suspected or confirmed fire ant stings acquired in NSW by:

• Calling the NSW Biosecurity Helpline on 1800 680 244.
• Completing the online reporting form.

Prompt reporting helps authorities investigate exposure locations and identify any further fire ant activity.

Further information

Additional information for health professionals is available from NSW Health and the NSW Department of Primary Industries and Regional Development.

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