The virus was mostly detected through tests on Saturday.
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Recently, a 47-year-old Malaysian woman living at Block 102 Aljunied Crescent was confirmed to have Zika virus infection.
The National Environment Agency (NEA) has inspected foreign workers’ dormitories as well as thousands of other premises in the area and in six other parts of the island.
“This confirms that local transmission of Zika virus infection has taken place”, the statement said.
The seven people who are still infectious remain quarantined in the Tan Tock Seng Hospital.
Singapore clinics on Monday, August 29, reported more Zika infections, bringing the suspected total to 50, as mosquito-fighting teams saturated the scene of the outbreak.
Zika has been blamed for the spread of microcephaly, which causes babies to be born with small heads and brains.
The Zika virus, carried by mosquitoes, was detected in Brazil past year and has since spread across the Americas.
Regional health experts said the Zika virus is likely to be significantly under-reported across tropical Southeast Asia as local health authorities fail to conduct adequate screening.
The other 13 cases were people who work or live in the broader Sims Drive and Aljunied Crescent area, where the virus was first detected.
Work was halted at the site on Saturday after an inspection by environment agency officers discovered that housekeeping was “unsatisfactory with potential breeding habitats favourable to mosquito breeding”, the statement added.
Malaysia has stepped up surveillance at main transit points with Singapore, where Zika prevention leaflets are being handed out.
The next day, his test results came out positive and sparked state-wide fear on the onset of the virus in the city-state of Singapore.
[Photo by Mario Tama/Getty Images] Although she was the first to catch the microcephaly-causing virus without travelling overseas, hers was not the first case of Zika virus in Singapore.
Cases of local transmissions have also been confirmed in Indonesia, Thailand and Vietnam.
In addition to the new cases involving pregnant women, three travel-related cases were reported in Broward County, three were in Pinellas County, and single cases were reported in Collier, Hillsborough, Orange and Sarasota counties.
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The current strain of Zika that is sweeping through Latin America and the Caribbean originated in Asia, where people could have built up greater immunity.
