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US health officials puzzled by 'unique' Zika case

By Ians English
Google Oneindia News

Washington, Sept 14: US health officials have updated their progress on a months-long probe into a "unique" Zika case in Utah, saying they are still unable to identify how the person was infected.

But the officials on Tuesday hinted that contact with another Zika patient's body fluids, such as tears, conjunctival discharge, saliva, vomitus, urine or stool might be responsible for the Utah person's infection, Xinhua news agency reported.

Unique Zika case puzzles US officials

Zika is mainly spread by mosquitoes but can also be spread via sex. The "unique" case which was found in July, however, had no known risk factors for the virus, had not travelled to an area with Zika transmission and had no sexual contact with an infected person.

Health officials were only able to determine the individual helped provide care to an elderly male family contact, reportedly the person's father, who contracted the Zika virus abroad.

This other patient, who subsequently passed away, was infected with an unusually high amount of virus, approximately 100,000 times higher than an average infection.

As part of the investigation, US health officials tested more than 200 people for the Zika virus, including family contacts of both cases, health care workers who cared for the deceased patient and members of the general public who lived near both of the cases, and they have not revealed any additional cases.

The officials also trapped and tested mosquitoes around the homes of both cases, and no mosquitoes known to carry the virus were found during the investigation.

It "remains unclear" how the "unique" case was infected, according to a report released on Tuesday by the US Centres for Disease Control and Prevention (CDC).

But the report noted that the person reported hugging and kissing the deceased patient, suggesting the possibility that the infection might be caused by contact with body fluids.

"Although it is not certain that these types of close contact were the source of transmission, family contacts should be aware that blood and body fluids of severely ill patients might be infectious," the officials said in the CDC's Morbidity and Mortality Weekly Report.

"This investigation will remain active, and we will continue working to learn more about Zika virus and how it may be spread," Dagmar Vitek, medical director from the Salt Lake county Health Department, said.

"People should continue to take the appropriate steps to prevent Zika virus infection -- especially pregnant women, and health care workers who are caring for severely ill patients with the disease," Vitek said.

More than 2,900 cases of Zika have been identified in the US and Hawaii and the Utah patient is the only case that has an unknown mode of transmission.


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