BEIRUT

Health

U.S. whooping cough outbreak could be worst in half century

FILE - This Monday, Sept. 19, 2011 file photo shows an empty bottle of Tetanus, Diphthera and Pertussis, (whooping cough) vaccine at Inderkum High School in Sacramento, Calif. Health officials say the U.S. is on track to have the worst year for whooping cough in more than five decades. Nearly 18,000 cases have been reported so far - more than twice the number seen at this point last year, the Centers for Disease Control and Prevention said Thursday, July 19, 2012. At this pace, the number of who

SEATTLE: The number of U.S. whooping cough cases has risen to around 18,000 in an outbreak that is on track to become the most severe in over a half century and could in part stem from possible waning vaccine protection, health officials said on Thursday.

Washington state, which declared an epidemic in April, and Wisconsin were particularly hard hit, with each reporting more than 3,000 cases, according to the U.S. Centers for Disease Control and Prevention.

Nine people have died overall and the number of cases was already more than double than at the same time last year.

Whooping cough, also known as pertussis, causes severe, almost uncontrollable coughing. In the United States, most children are immunized with a DTaP five-dose series vaccine that is given as a series of shots, starting at two months.

All adults, including pregnant women, should get a booster shot because the contagious illness is especially dangerous for children under a year old who have yet to complete a cycle of vaccinations, Dr. Anne Schuchat, director of the CDC's National Center for Immunization and Respiratory Diseases, told a media briefing.

"It's most dangerous for babies," Schuchat said, adding that the current outbreak at its existing pace could become the most severe since 1959, when 40,000 cases were reported. "Preventing infant deaths from the disease is our primary national goal," she said.

A spike in whooping cough cases among 10-year-olds and adolescents who are 13 and 14 was a concern, perhaps an indicator that the pertussis vaccine may be wearing off earlier than anticipated, Washington Health Secretary Mary Selecky said.

The U.S. groups of 10-, 13- and 14-year-olds who are experiencing a high illness rate had DTaP vaccinations, which were introduced in 1997 at the same time that the prior DTP vaccine was discontinued.

The earlier vaccine used whole cell parts made of killed pertussis bacteria, while DTaP uses only small acellular bacteria pieces, not the whole bacteria cell, said Donn Moyer, Washington state Health Department spokesman

CDC officials will begin an investigation in Washington state later this month "to analyze our data for cases among 13- to 14-year-olds to see what can be learned about disease rates and vaccination status," Moyer told Reuters.

The number of cases in Washington, with no deaths, has tripled since April, with 1,132 cases reported by the end of that month.

Moyer said the CDC also plans a similar study in California, where a 2010 epidemic counted more than 9,000 cases, including 10 infant deaths.

Whooping cough typically begins with cold-like symptoms such as a fever, runny nose and sneezing and is accompanied by a mild cough that grows more severe by the first or second week. A high-pitched whoop, giving the illness its name, can follow violent coughing fits.

This year, Australia is experiencing a high rate of whooping cough, Schuchat said.

 

Recommended

Advertisement

Comments

Your feedback is important to us!

We invite all our readers to share with us their views and comments about this article.

Disclaimer: Comments submitted by third parties on this site are the sole responsibility of the individual(s) whose content is submitted. The Daily Star accepts no responsibility for the content of comment(s), including, without limitation, any error, omission or inaccuracy therein. Please note that your email address will NOT appear on the site.

Alert: If you are facing problems with posting comments, please note that you must verify your email with Disqus prior to posting a comment. follow this link to make sure your account meets the requirements. (http://bit.ly/vDisqus)

comments powered by Disqus

Advertisement

FOLLOW THIS ARTICLE

Interested in knowing more about this story?

Click here