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zoom RSS カリフォルニアで百日咳の流行 乳児9人が死亡/米国医療事情

<<   作成日時 : 2010/10/31 23:45   >>

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 カリフォルニアの乳児が百日咳で最も大きな被害を受けていると、新たな州公衆衛生局の発表があった。
 これまで死亡した9人は全て3ヶ月未満の乳児で、入院患者196人のうち74%が6ヶ月未満、57%が3ヶ月未満であった。近親の大人からしばしば乳児に感染して広まる。生後2ヶ月まではワクチン接種はしないので特に妊婦など接触する可能性がある場合はワクチンを受けるようにとしている。
 火曜日の州のデータではカリフォルニアで4,017人を記録し、1955年以来の数値となっているが、成人では診断されていない場合も多い。
 入院した6ヶ月未満の乳児の77%、死亡した9人のうち8人はラテン系米国人であった。
 6ヶ月未満の乳児は重症化しやすいので、2,4,6ヶ月の合計3回のワクチン接種が望ましい。
 州のデータでは6ヶ月未満に加え、7-9才と10-18才も罹患率は高かった。
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最近50年で最大の百日咳の流行/米国医療事情 カリフォルニア
http://kurie.at.webry.info/201008/article_13.html
母親の百日咳から新生児が感染して死亡/米国
http://kurie.at.webry.info/201006/article_2.html
百日咳 1913
http://kurie.at.webry.info/201004/article_11.html
ワクチン接種 取扱いをやめる医師/米国医療事情
http://kurie.at.webry.info/200812/article_5.html
成人の百日咳患者が、重症化しやすい乳幼児への感染源に/百日ぜき ワクチン
http://kurie.at.webry.info/200706/article_21.html
百日ぜき流行の再来/米国医療事情
http://kurie.at.webry.info/200812/article_46.html
間違いだった百日ぜきの流行/検査による擬陽性 米国
http://kurie.at.webry.info/200708/article_45.html
原因不明の長引くせき、大人も百日ぜき注意
http://kurie.at.webry.info/200706/article_39.html
百日ぜきの患者数増加/大人の割合増加 /百日ぜき ワクチン
http://kurie.at.webry.info/200708/article_5.html
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Whooping cough data from state show babies hardest hit, epidemic worst since 1955 [Updated]
September 16, 2010 | 6:47 am
http://latimesblogs.latimes.com/lanow/2010/09/new-whooping-cough-numbers-from-state-show-babies-hardest-hit-epidemic-worst-since-1955.html

画像Babies have been hardest hit by whooping cough in California, according to new statistics released by the state Department of Public Health.

All nine deaths so far this year have been among infants under 3 months old. Among patients who are critically ill with the disease, babies have also been disproportionately hospitalized.

According to the data released late Wednesday, of 196 patients known to have been hospitalized with whooping cough in California, 74% were infants under 6 months old and most -- 57% -- were under 3 months old.

Whooping cough is often spread to babies by parents, siblings, aunts, uncles and grandparents and other adults. Because infants do not begin vaccinations until they are 2 months old, health officials for months have been pleading for anyone who expects to be in contact with babies -- especially pregnant women -- to get vaccinated.

“There are a lot of people who aren’t fully immunized,” said Dr. Jonathan Fielding, director of the Los Angeles County Department of Public Health. “People with respiratory conditions and cold-like conditions should not have contact with small infants.”



Whooping cough is spreading among adults too, but many of those cases aren’t reflected in the state’s numbers because the disease is often not diagnosed in adults.

Cases of whooping cough, or pertussis, continue to tick upward in California. State data as of Tuesday show that California has had the most cases of whooping cough since 1955, with 4,017 confirmed, probable and suspect cases reported so far this year.

The latest figure surpasses the number of cases reported in 1958 in California, when 3,837 people were sickened with the severe bacterial disease. This year marks the highest number of whooping cough cases in California since widespread vaccination efforts began in the 1940s and '50s.

[Updated 1:45 p.m.: State officials said the current rate of infection is 10.3 cases per 100,000 people, the highest incidence since 1962 when the state reported a rate of 10.9 cases per 100,000.]

Health officials also released demographic information showing that 77% of the hospitalized infants under 6 months old were Latino, as were eight of the nine fatalities.

Ken August, a spokesman for the California Department of Public Health, said health officials believe very young Latino infants are overrepresented in hospitalized cases because Latino babies “are more likely to live in larger households, per census data,” giving the infants more opportunities to be exposed to someone with whooping cough.

Infants under 6 months old are among the most susceptible to whooping cough because they are too young to have received the three inoculations needed to give them considerable protection from the disease. Vaccination guidelines call for shots at 2, 4 and 6 months.

August said the rates of immunization for Latino children are high and after 6 months of age hospitalization rates drop for Latinos. State data show that, overall, whites are the most likely group to be affected by whooping cough.

In addition to high rates of whooping cough in infants under 6 months old, state data also show high rates among children ages 7 to 9 and people ages 10 to 18 years.

Cases of whooping cough seemed to surge this summer, according to the state data, with more than 700 cases reported in May and close to 1,000 cases each in June and July.

The state numbers on pertussis cases ultimately may climb. Some diagnoses may come later, and confirmed cases are not always immediately relayed by counties to Sacramento.

A news conference to discuss the state's whooping cough epidemic, as well as the upcoming flu season, is scheduled for 11 a.m. Thursday in Sacramento.

Fielding, the health officer in Los Angeles, said he didn’t know whether whopping cough cases had crested locally. He said he anticipated more diagnoses as children return to school this month and as doctors pay more attention to a disease some have erroneously believed was relegated to the history books.

-- Rong-Gong Lin II

Photo: Carla Gottgens / Bloomberg. Patient being vaccinated against pertussis, a.k.a. whooping cough.


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