A pregnant woman in Singapore was tested positive for Zika virus. She is among the 115 confirmed cases of the virus detected in the city-state.

The woman and her baby are being closely monitored by the by doctors, the Singapore Ministry of Health (MOH) said.

"Her doctor is following up closely with her to monitor the health and the development of her baby. She will be referred to a maternal-fetal medicine specialist for counseling and advice," the statement by health ministry said.

She lives in Aljunied area in Singapore, where 22 other new cases of Zika were detected.

"Over time, we expect Zika cases to emerge from more areas. We must work and plan on the basis that there is Zika transmission in other parts of Singapore," said Health Minister Gan Kim Yong.

National Environment Agency (NEA) has launched mosquito control operations in various parts of the city.

"As Zika is transmitted through mosquitoes, vector control remains the mainstay to prevent transmission of the Zika virus," the agency said in a press release.

The health ministry has recommended pregnant women who have recently developed any signs of fever, rash, or red eyes, to get themselves tested for the virus.

"To prevent Zika from becoming entrenched in our local population, MOH will also undertake strict control measures. All confirmed cases will be admitted to a public hospital until they recover and test negative for the virus," the statement continued.

Singapore is a major travel hub in Asia with an average of 8 million tourist arrivals per year. The neighboring countries of Malaysia and Indonesia are screening people arriving from Singapore for signs of the virus.

The Zika virus outbreak was first reported from Brazil in early 2015, from which the virus spread to other parts of the Americas. The disease has only mild symptoms, but the virus is associated with causing microcephaly in unborn children, though not all pregnant women infected with Zika virus gave birth to babies with microcephaly. Brazil has reported 1,835 cases of microcephaly since the outbreak of the epidemic, according to World Health Organization.

Joan Teoh, 42, a Singapore resident told The Straits Times: "It's not unexpected - mosquitoes fly around. I don't think I'll use insect repellent because the symptoms sound mild, not as bad as dengue, unless you are a pregnant woman. I am more worried about dengue, it affects everyone ... Hopefully everyone will do their part, like ensuring there is no stagnant water."