A worker uses an electronic microscope to observe mosquitoes at "Grupo Avance" (Advance Group) laboratory where biochemists are developing a possible Zika-repellent clothes detergent additive in Santiago, March 4, 2016. REUTERS/Ivan Alvarado

The total number of confirmed Zika virus cases has reached up to 115 in Singapore, including the first pregnant woman who has been diagnosed with the virus, the authorities said on Wednesday evening.

The Ministry of Health (MOH) and National Environment Agency (NEA) said in a joint statement that 24 new cases have been confirmed and a new potential cluster has been discovered at Bedok North Avenue 3.

The statement said out of those 24 cases, 22 cases are from the Sims Drive/Aljunied Crescent cluster, extending up to Kallang Way and Paya Lebar Way.

NEA said it has already taken steps to monitor the situation. The agency inspected almost 5,000 premises out of an estimated 6,000 premises in the Aljunied Crescent/Sims Drive cluster and conducted ground checks in the vicinity.

The agency will begin mosquito control operations at the new potential cluster at Bedok North Avenue 3, and will also step up vector control in other parts of Singapore. NEA added that vector control remains the main reason for reducing the spread of Zika.