News / Health

Scientists Find Temperature, Rainfall Can Predict Cholera

Slight rise in temperature can double number of cases

A woman exhibiting cholera symptoms is helped at an earthquake refugee camp in Port-au-Prince, Haiti on Jan. 8, 2011
A woman exhibiting cholera symptoms is helped at an earthquake refugee camp in Port-au-Prince, Haiti on Jan. 8, 2011
Art Chimes

Scientists studying temperature and rainfall patterns in areas that later had cholera outbreaks say small increases in warmth and wetness are followed by a surge in cholera cases a few months later. The information could give public health authorities a new tool to help battle this serious disease.

According to the World Health Organization, more than 100,000 people die from cholera each year, despite a vaccine which can prevent infection and simple treatment that works most of the time.

Advance notice of an outbreak might help in the battle against the acute diarrheal disease.

Now, an international team working in Tanzania has found that rising temperature and increased rainfall can signal a coming surge in cholera cases.

"What these authors from the International Vaccine Institute in [South] Korea, as well as the University of North Carolina, and the Ministry of Health in Zanzibar in Tanzania have shown," says cholera expert Peter Hotez, "is that a one degree increase in temperature can ultimately result in a two-fold increase in the number of cholera cases."

Hotez is president of the American Society of Tropical Medicine and Hygiene, which published the research in its journal.

He says that previous research had established that the Vibrio cholerae bacteria can thrive in the gut of a tiny aquatic animal called a copepod.

"So the rationale for looking at temperature is because we know that increases in temperature can result in proliferation of these copepods and therefore create new niches for the Vibrio cholerae to replicate."

Cholera is typically spread through contaminated water, and with the bacteria proliferating when temperatures and rainfall increase, the number of infections also increases. As global temperatures have risen in the past decade, so have the number of cholera cases, according to the WHO. And Hotez says the nature of the outbreaks is changing, too.

"Now we're seeing long and very protracted outbreaks of cholera, like the one that's been occurring in Haiti and now the Dominican Republic. For instance, the epidemic in Zimbabwe lasted a year and caused 4,000 deaths, and we're probably seeing something of similar magnitude in Haiti."

Lead author Rita Reyburn and colleagues point out that climate scientists are predicting a rise in global mean temperatures over the next century of between one and six degrees Celsius. The authors say that suggests the "possibility of increased cholera incidence in many resource-poor regions of the world."



You May Like

WHO: Anti-Ebola Efforts Should Focus on West Africa

Official says WHO is 'reasonably confident' countries bordering those hardest hit by the Ebola outbreak are not seeing the virus crossing their borders More

South Sudan Crisis Threatens Development

Economic costs and lost development opportunities in South Sudan have erased what little progress the country has made since independence in 2011 More

Ukrainian PM Warns: Russia May Try to Disrupt Sunday Poll

Arseniy Yatsenyuk orders full security mobilization for parliamentary election to prevent ‘terrorist acts’ from being carried out More

This forum has been closed.
Comments
     
There are no comments in this forum. Be first and add one

Featured Videos

Your JavaScript is turned off or you have an old version of Adobe's Flash Player. Get the latest Flash player.
After Decades of Pressure, Luxembourg Drops Bank Secrecy Rulesi
X
October 21, 2014 12:20 AM
European Union finance ministers have reached a breakthrough agreement that will make it more difficult for tax cheats to hide their money. The new legislation, which had been blocked for years by countries with a reputation as tax havens, was approved last week after Luxembourg and Austria agreed to lift their vetoes. But as Mil Arcega reports, it doesn’t mean tax cheats have run out of places to keep their money hidden.
Video

Video After Decades of Pressure, Luxembourg Drops Bank Secrecy Rules

European Union finance ministers have reached a breakthrough agreement that will make it more difficult for tax cheats to hide their money. The new legislation, which had been blocked for years by countries with a reputation as tax havens, was approved last week after Luxembourg and Austria agreed to lift their vetoes. But as Mil Arcega reports, it doesn’t mean tax cheats have run out of places to keep their money hidden.
Video

Video Kobani Refugees Welcome, Turkey Criticizes, US Airdrop

Residents of Kobani in northern Syria have welcomed the airdrop of weapons, ammunition and medicine to Kurdish militia who are resisting the seizure of their city by Islamic State militants. The Turkish government, however, has criticized the operation. VOA’s Scott Bobb reports from southeastern Turkey, across the border from Kobani.
Video

Video China Political Meeting Seeks to Improve Rule of Law

China’s communist leaders will host a top level political meeting this week, called the Fourth Plenum, and for the first time in the party’s history, rule of law will be a key item on the agenda. Analysts and Chinese media reports say the meetings could see the approval of long-awaited measures aimed at giving courts more independence and include steps to enhance an already aggressive and high-reaching anti-corruption drive. VOA’s Bill Ide has more from Beijing.
Video

Video US ‘Death Cafes’ Put Focus on the Finale

In contemporary America, death usually is a topic to be avoided. But the growing “death café” movement encourages people to discuss their fears and desires about their final moments. VOA’s Jerome Socolovsky reports.
Video

Video Ebola Orphanage Opens in Sierra Leone

Sierra Leone's first Ebola orphanage has opened in the Kailahun district. Hundreds of children orphaned since the beginning of the Ebola outbreak face stigma and rejection with nobody to care for them. Adam Bailes reports for VOA about a new interim care center that's aimed at helping the growing number of children affected by Ebola.
Video

Video Young Nairobi Tech Innovator on 'Track' in Security Business

A 24-year-old technology innovator in Nairobi has invented a tracking device that monitors and secures cars. He has also come up with what he claims is the most robust audio-visual surveillance system yet. As Lenny Ruvaga reports from the Kenyan capital, his innovations are offering alternative security solutions.
Video

Video Latinas Converting to Islam for Identity, Structure

Latinos are one of the fastest growing groups in the Muslim religion. According to the Pew Research Center, about 6 percent of American Muslims are Latino. And a little more than half of new converts are female. VOA’s Carolyn Presutti travelled to Miami, Florida -- where two out of every three residents is Hispanic -- to learn more.
Video

Video Exclusive: American Joins Kurds' Anti-IS Fight

The United States and other Western nations have expressed alarm about their citizens joining Islamic State forces in Syria and Iraq. In a rare counterpoint to the phenomenon, an American has taken up arms with the militants' Syrian Kurdish opponents. Elizabeth Arrott has more in this exclusive profile by VOA Kurdish reporter Zana Omer in Ras al Ayn, Syria.
Video

Video South Korea Confronts Violence Within Military Ranks

Every able-bodied South Korean male between 18 and 35 must serve for 21 to 36 months in the country’s armed forces, depending upon the specific branch. For many, service is a rite of passage to manhood. But there are growing concerns that bullying and violence come along with the tradition. Reporter Jason Strother has more from Seoul.
Video

Video North Carolina Emerges as Key Election Battleground

U.S. congressional midterm elections will be held on November 4th and most political analysts give Republicans an excellent chance to win a majority in the U.S. Senate, which Democrats now control. So what are the issues driving voters in this congressional election year? VOA National Correspondent Jim Malone traveled to North Carolina, one of the most politically competitive states in the country, to find out.
Video

Video Comanche People Maintain Pride in Their Heritage

The Comanche (Indian nation) once were called the “Lords of the Plains,” with an empire that included half the land area of current day Texas, large parts of Oklahoma, New Mexico, Kansas and Colorado.The fierceness and battle prowess of these warriors on horseback delayed the settlement of most of West Texas for four decades. VOA’s Greg Flakus reports from Lawton, Oklahoma, that while their warrior days are over, the 15,000 members of the Comanche Nation remain a proud people.
Video

Video Turkey Campus Attacks Raise Islamic Radicalization Fears

Concerns are growing in Turkey of Islamic radicalization at some universities, after clashes between supporters of the jihadist group Islamic State (IS) or ISIS, and those opposed to the extremists. Pro-jihadist literature is on sale openly on the streets of Istanbul. Critics accuse the government of turning a blind eye to radicalism at home, while Kurds accuse the president of supporting IS - a charge strongly denied. Henry Ridgwell reports from London.

All About America

AppleAndroid