Ticks linked to deadly virus discovered in China

Mar 21, 2011 by Deborah Braconnier report
Morphologic Features of SFTS Bunyavirus. Image credit: [i]New England Journal of Medicine[/i], doi:10.1056/NEJMoa1010095

(PhysOrg.com) -- Doctors have been aware for years that ticks can spread the bacteria responsible for Lyme disease, but scientists in China have discovered a new deadly virus that is also carried by ticks and has been responsible for at least 36 deaths in China. In a recent study published in the New England Journal of Medicine, the scientists at the Chinese Center for Disease Control and Prevention introduced the virus responsible for these deaths.

The new , SFTSV, stands for severe fever with thrombocytopenia syndrome bunyavirus and can cause those infected to experience fever and multiple . Severe symptoms include thrombocytopenia (low blood platelet count), gastrointestinal issues, and leukocytopenia (low blood white count, which creates an increased risk in infection). With the original cases coming in, scientists observed a high fatality rate of 30 percent.

The virus was isolated in 171 patients throughout six different rural provinces in China and it had led to 36 deaths by September of 2010, creating a total fatality rate of 12 percent.

Scientists analyzed the new SFTSV and determined it was related to five Bunyaviridae viruses: orthobunyavirus, hantavirus, nairovirus, phlebovirus, and tospovirus. The report in the cited that they believe it belongs to the Phlebovirus genus as well as being related to the other four.

The majority of the patients with the virus were older than 50, with over half of them being women. Almost all of those who acquired the virus were farmers who lived in rural wooded areas and spent their time in agricultural fields and wooded areas.

Scientists found both mosquitoes and ticks in the area and homes of most of the patients. Scientists tested 5,900 mosquitos from the homes and found no presence of . These scientists also tested the Haemaphysalis longicomis species of ticks from the domesticated animals in the area and were able to isolate the RNA in 5.4 percent of the ticks. The viral RNA from the was not identical to those from the patients but was closely related.

To date, there has been no epidemiological evidence that the SFTSV virus can be transmitted through human-to-human contact so the risk of a global outbreak is remote.

Explore further: US Ebola labs, parts for clinic arrive in Liberia

More information: Fever with Thrombocytopenia Associated with a Novel Bunyavirus in China, New England Journal of Medicine, March 16, 2011. doi:10.1056/NEJMoa1010095

Related Stories

Can hantavirus infection spread among humans?

Jan 18, 2008

In connection with last year's epidemic, a research team at Umea University in Sweden has managed for the first time to show that hantavirus exists in human saliva. This raises the question of whether this contagion can spread ...

New breakthrough in fight against lethal CCHF virus

May 17, 2010

Crimean-Congo haemorrhagic fever (CCHF) virus is a rare but serious human infection that causes internal bleeding, organ failure and ultimately death. Scientists writing in the Journal of General Virology have developed a new ...

Recommended for you

Africa's uneven health care becomes easy prey for Ebola

2 hours ago

The disparity in African countries' ability to fight Ebola has left the continent fighting an uneven struggle against a disease that doesn't respect borders—yet relatively simple measures could help, experts say.

Ebola case stokes concerns for Liberians in Texas

3 hours ago

The first case of Ebola diagnosed in the U.S. has been confirmed in a man who recently traveled from Liberia to Dallas, sending chills through the area's West African community whose leaders urged caution ...

Is Australia prepared for Ebola?

6 hours ago

Australia needs to be proactive about potential disease outbreaks like Ebola and establish a national centre for disease control.

Dallas hospital confirms first Ebola case in US

12 hours ago

A patient at a Dallas hospital has tested positive for Ebola, the first case of the disease to be diagnosed in the United States, federal health officials announced Tuesday.

User comments : 1

Adjust slider to filter visible comments by rank

Display comments: newest first

beefchop
not rated yet Mar 21, 2011
36 deaths, 171 infections. Should that read 21%, not 12% ?