A second individual in the Torres Strait local government area has been diagnosed with malaria, as reported by the state government.

Ongoing investigations are being conducted regarding these two cases.

Authorities have reported a total of 71 malaria cases in Queensland, and 97 percent of them were acquired abroad.

The cases were predominantly acquired in Papua New Guinea and Solomon Islands.

The first locally-acquired case in the Torres Strait local government area was identified last month.

According to the World Health Organisation, symptoms of malaria can be mild or life-threatening.

Mild symptoms include fever, chills and headache.

Severe symptoms can include fatigue, confusion, seizures and difficulty breathing.

Symptoms can start within 10 to 15 days of getting bitten by an infected mosquito.