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Swine flu cases in Calif. worry health officials

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[April 22, 2009]  ATLANTA, Ga. (AP) -- Health officials alerted doctors Tuesday to a unique type of swine flu diagnosed in two California children, but it's unclear whether many people will be susceptible to the infection. The children were diagnosed last week. One was a 10-year-old boy in San Diego County, and the other a 9-year-old girl in neighboring Imperial County. Both recovered.

RestaurantU.S. Centers for Disease Control and Prevention officials said there's no reason for the public to take unusual measures against it.

"CDC is concerned, but that's our job," said CDC spokesman Tom Skinner.

Health officials have long feared the emergence of a deadly form of flu. They have not noted a spike in flu cases or a rash of severe illnesses. But they are continuing to investigate the genetics of the virus and track down and test people who may have been in contact with the children.

Both children became sick in late March and experienced fever and cough. The boy also vomited.

The two had not been in contact with each other, CDC officials said.

The boy's mother and brother also had a flu-like illness recently, as did a brother and a cousin of the girl. None of those relatives were tested for flu at the time of their illness.

The San Diego County boy and his 8-year-old brother flew from California to Dallas in early April and are currently with relatives in Texas. Health officials also are trying to contact the plane's flight crew and two children who sat near the boys, CDC officials said.

In the past, CDC received reports of approximately one human swine influenza virus infection every one or two years. But more than a dozen cases of human infection with swine influenza have been reported since late 2005.

Most cases occur in people who were exposed to pigs. Neither child had touched a pig, according to their families, although the girl had been at an Imperial County agricultural fair four weeks before she got sick.

The jump in cases in the past few years could be because of technological improvements and expansion of public health laboratories, which have improved testing capacity. But genetic mutations could also play a role.

The new flu contains a unique combination of gene segments that have not been seen in swine or human flu viruses before, CDC officials said.

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The same virus has not been detected in any California pigs. "But we don't test every pig for influenza, so we don't know all the strains that are circulating," said Dr. Gil Chavez, California's state epidemiologist.

Early tests indicate this type of flu is resistant to amantadine and rimantadine, two common antiviral medications. It is not unique in that respect -- a more common virus that's been infecting people this flu season also is resistant to those drugs.

Health officials think the current seasonal flu vaccine may not protect against it.

Swine flu is an infamous disease in public health circles. In 1976, health officials were frightened by unusual cases of swine flu in soldiers at Fort Dix, N.J. The virus appeared to be similar to a deadly flu that killed millions around the world in 1918 and 1919.

Federal officials vaccinated 40 million Americans during a national campaign. The pandemic never materialized, but thousands who got the shots filed injury claims, saying they suffered a paralyzing condition and other side effects from the vaccinations.

The government is more sophisticated now in how it diagnoses and tracks diseases, said Dr. Lyn Finelli, a CDC epidemiologist.

[Associated Press; By MIKE STOBBE]

Copyright 2009 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.



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