Thailand investigates four cases of suspected Zika-linked microcephaly
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A city worker fumigates the area to control the spread of mosquitoes at a university in Bangkok, Thailand, September 13, 2016. REUTERS/Athit Perawongmetha
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By Amy Sawitta Lefevre and Pracha Hariraksapitak
BANGKOK (Reuters) - Thailand is investigating four suspected cases of Zika-related microcephaly in three babies and a 36-week old unborn baby, the public health minister said on Tuesday, in what could be the first cases of Zika-linked microcephaly in Southeast Asia.
Several countries in Southeast Asia have reported increasing cases of infection from the mosquito-borne Zika virus but Thailand has one of the highest numbers in the region, with 349 confirmed since January, including 25 pregnant women.
Public Health Minister Piyasakon Sakolsatayadorn said authorities needed to be thorough in their investigation of the cases as confirmation would be "sensitive".
"The lab results will take at least two days because we have to be thorough with this as it is a big deal and a link hasn't been detected before," Piyasakon told Reuters.
"This is a sensitive matter for Thailand," he said.
U.S. health officials have concluded that Zika infections in pregnant women can cause microcephaly, a birth defect marked by small head size that can lead to severe developmental problems in babies.
Piyasakon said the three babies were born with small heads and an ultrasound appeared to indicate the unborn baby had a small head.
Of the four mothers, two were diagnosed with Zika when they were pregnant but two were not confirmed to have had Zika, said Apichai Mongkol, director-general of the ministry's Department of Medical Sciences.
If a Thai case were confirmed, it would be the first in Southeast Asia, the World Health Organization (WHO) said in a statement emailed to Reuters.
The connection between Zika and microcephaly first came to light last year in Brazil, which has confirmed more than 1,600 cases of microcephaly that it considers to be related to Zika infections in the mothers.
Some health experts have accused Thailand, which has a thriving tourist industry, of playing down the risk from Zika.
But officials dismiss that saying the response has been adequate and another mosquito-born disease, dengue, which can be deadly, is a bigger threat.
The director-general of Thailand's Disease Control Department, Amnuay Gajeena, said the four cases were being monitored but he declined to say exactly where they were suspected of contracting the virus.
"It is not in Bangkok," Amnuay told Reuters. "Both the mothers and babies are being tested and we have sent the tests to several labs."
There are no specific tests to determine if a baby will be born with microcephaly, but ultrasound scans in the third trimester of pregnancy can identify the problem, according to the WHO.
The World Health Organization lists Singapore, the Philippines, Malaysia, Thailand and Vietnam as countries reporting new cases of Zika.
Singapore has recorded 393 cases since diagnosing its first in August. It has confirmed 16 pregnant women with the virus.
The WHO has also said there is strong scientific consensus that Zika can also cause Guillain-Barre, a rare neurological syndrome that causes temporary paralysis in adults.
According to the WHO, there are two major lineages of Zika - an African lineage, which has only been reported in Africa, where the virus was first discovered in 1947, and an Asian lineage of strains.
There is no vaccine or treatment for Zika, which is a close cousin of dengue and chikungunya and causes mild fever, rash and red eyes. An estimated 80 percent of people infected have no symptoms, making it difficult for pregnant women to know whether they have been infected.
(Additional reporting by Cod Satrusayang and Panarat Thepgumpanat in BANGKOK, Marius Zaharia in SINGAPORE; Writing by Amy Sawitta Lefevre; Editing by Robert Birsel)
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