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Shanxi is not the only province to suffer from encephalitis B this year. The viral disease has also claimed seven lives in northwest China's Shaanxi Province, according to the provincial health bureau on Friday.

A total of 186 people in Shaanxi have been infected with the mosquito-transmitted disease since Jan. 1, up 27.40 percent year on year, according to the bureau.

Rural residents and children account for 82 percent of the reported cases, according to the bureau.

Encephalitis B causes an inflammation of the brain and can be contracted by people of all ages. It is usually the result of a viral infection transmitted to humans by mosquitoes. The illness begins with flu-like symptoms and severe headaches.

The provincial health bureau has warned local people to visit doctors as soon as possible if they develop these symptoms.

The bureau also called on local disease control centers to move quickly to eradicate mosquitoes and raise public awareness about prevention to stop infections, especially in places where encephalitis B cases have been reported.

Encephalitis B cases usually occur in July, August and September and the under-10 age group can easily be affected, according to the Shaanxi provincial health bureau.

Young people stricken with the illness are more likely to die or suffer a disability.

The Chinese Ministry of Health urged this week that measures to prevent and control encephalitis B be stepped up all over the country, after a recent outbreak that killed 19 in Yuncheng City in north China's Shanxi Province.

Places where livestock are kept must undergo strict mosquito controls to cut off infection channels. People should avoid staying overnight in the open air in places where mosquitoes gather and take protective measures like using window screens and mosquito repellent, according to the ministry.

People who develop symptoms of fever, headache, vomiting and sleepiness after being bitten by mosquitoes must go to hospital as soon as possible, said the ministry.

It said that vaccination is critical to controlling encephalitis B. Provinces must vaccinate children and provinces where outbreaks have been reported must carry out emergency vaccinations.

Suspected or confirmed encephalitis B cases must be reported quickly and epidemiological research carried out in outbreak-hit areas.

Surveillance and early warning measures for the disease must be properly carried out, it added.

Health authorities at all levels are responsible for supervising the control of encephalitis B and ensuring that all necessary measures are correctly implemented, according to the ministry.

An outbreak of encephalitis B in Yuncheng City, in Shanxi province, had infected 65 people as of last Monday, of whom 19 have died.

Effective measures have been taken to curb the spread of the disease since the first case was reported on July 13, according to Shanxi health authorities.

Nine out of 13 counties of the city, which has a population of 5 million, have reported cases of encephalitis B, said the local disease control center. Yuncheng, which reported about 30 cases of encephalitis B in 2005,accounts for over 50 percent of encephalitis B cases in Shanxi Province each year.

Last month, the health ministry received 2,314 reports of new encephalitis B cases, up 43.73 percent on the same period last year. It also recorded 78 deaths from the disease, down 6.02 percent year-on-year.

The ministry noted it was peak season for encephalitis B and called for local authorities to do more to prevent its spread.

China saw two big outbreaks of encephalitis B in the 1960s and 1970s, prompting a nationwide vaccination campaign.

However, over the last couple of years, encephalitis B has been on the resurge, with China reporting between 5,000 and 10,000 cases a year. Some local areas have been ravaged by severe outbreaks.

(Xinhua News Agency August 19, 2006)