World Bulletin / News Desk
The outbreak of West Nile disease in the United States moved a step closer on Wednesday to becoming the second worst on record with federal health authorities reporting 280 cases of the virus-caused illness over the past week.
There have now been 4,249 cases of West Nile recorded this year, according to the Centers for Disease Control and Prevention, 20 cases fewer than in 2006, the second-largest outbreak on record.
The number of deaths rose by five to 168 since last week, the CDC said.
The worst year on record for West Nile disease was 2003, when 9,862 cases were reported, the CDC said.
The pace of new cases of the disease - which is transmitted from infected birds to humans by mosquitoes -- has slowed since late summer, authorities said.
More than 70 percent of the cases have been reported in eight states: Texas, Mississippi, Michigan, South Dakota, Louisiana, Oklahoma, Illinois and California. Texas has been the hardest hit, recording close to 40 percent of the cases in the country, according to the CDC.
The Dallas-Fort Worth area has been the epicenter of this year's outbreak, with 33 deaths, according to the Texas Department of State Health Services.
The Dallas Morning News reported Wednesday that health officials in Tarrant County, home to Fort Worth, may have vastly underreported cases of the serious neuroinvasive form of West Nile.
The report said the number of cases detected through Tarrant County blood bank screenings - information that helps public officials determine the size of an outbreak - differs significantly from what officials there have reported.
But state health officials said it was unlikely cases were overlooked.
The severe neuroinvasive form of the disease almost always requires hospitalization and can lead to meningitis, encephalitis and death, according to the CDC.
"Neuroinvasive disease is not subtle," said Carrie Williams, a spokeswoman for the Texas health department. "We're confident physicians knew about the outbreak and were on the lookout for disease."
Nationwide, half of cases reported to the CDC have been of the neuroinvasive form. The other half are West Nile Fever, a milder form which causes flu-like symptoms and is not deadly.
Outbreaks tend to be unpredictable and are typically triggered by a combination of hot weather and intermittent rainfall as well as ecological factors such as the size of the bird and mosquito populations.
Guinea's President Alpha Conde announced new emergency measures in Ebola fight on Saturday
'Meetings happened. Action didn’t,' says Medecins Sans Frontieres report.
WHO said that on many levels, the world is better prepared now than ever before for aflu pandemic
Myanmar health officals say an outbreak of H5N1 bird flu in Mandalay
Tokyo Electric said it has been aware since last spring that radiation levels in water running in one of the plant gutters rise when it rains
Safe drinking water is available at about one-third of the level it was before the conflict erupted nearly five years ago, and supplies are cut-off to punish civilians at times
Elephants in Angola, which suffered decades of civil war, have been observed avoiding heavily-mined areas, suggesting their trunks were warning them to stay away.
Favipiravir halved death rate among some to 15 pct, but WHO says more research required on drug
The first medicine containing stem cells to treat a rare condition caused by burns to the eye has approved.
940 parasite samplescollected at 55 malaria treatment centres across Myanmar and its border regions. They found that almost 40 percent of the samples had mutations in their so-called kelch gene, K13 -- a known genetic signal of artemisinin drug resistance.
Yaws is known to be prevalent in 12 countries in areas where people have little access to healthcare, mainly in West and Central Africa, Asia and the Pacific Islands.
In the past few years, Nepal has seen the numbers of endangered species, such as the Royal Bengal tiger or the one-horned rhino, rise.
The investment would represent as little as 0.1 percent of current national health spending of the low and middle-income countries affected by NTD.
Nearly 1,000 abandoned California sea lions have washed ashore this year in what rehabilitation centers say is a growing crisis for the animals.
West Africa cases of Ebola show the first decrease in three weeks.
"Marijuana fools the brain's feeding system."scientist Tamas Horvath said.