有限的人與人間的新型流感病毒A型H3N2的傳播流行

有限的人與人間的新型流感病毒A型H3N2的傳播流行 － 美國愛荷華州，2011年11月的通報 Limited Human-to-Human Transmission of Novel Influenza A (H3N2) Virus — Iowa , November 2011

2011年11月20日，美國疾管局證實在愛荷華州兩個縣的3例兒童感染起源自豬流感的三重基因片段重組的A型流感（H3N2）（S - OtrH3N2）病毒。On November 20, 2011, CDC confirmed three cases of swine-origin triple reassortant influenza A (H3N2) (S-OtrH3N2) virus infection in children in two counties in Iowa . 3例兒童均未住院治療，每例都從輕度發燒性呼吸症狀發作而康復。None of the children were hospitalized, and each has recovered from a mild episode of febrile respiratory illness. 這三例都因相互接觸而感染，三例最近都未接觸到豬隻。All three were in contact with one another, and none had a known recent exposure to swine. 在愛荷華州未檢測出其他的人感染這種病毒，也沒有證據顯示S - OtrH3N2病毒持續的人對人傳播感染存在。No additional human infections with this virus have been detected in Iowa, and no evidence of sustained human-to-human transmission of this S-OtrH3N2 virus exists; 自2009年以來持續監測有18例確診人類感染源自豬流感A型（H3N2）病毒。surveillance is ongoing.Eighteen human infections with swine-origin influenza A (H3N2) viruses have been identified since 2009 (1,2). 最近10例，包括其中在這份愛荷華州通報的三例感染A型S - OtrH3N2流感病毒是帶有從2009年大流行的A型（H1N1）豬流感病毒（pH1N1）的基質蛋白（matrix M）基因組片段。The most recent 10 cases, including the three Iowa cases described in this report, were infections with S-OtrH3N2 viruses containing the matrix (M) gene from the pandemic 2009 influenza A (H1N1) virus (pH1N1). 這A型S - OtrH3N2流感病毒被認定是從源自北美養豬場流行的豬流感A型（H3N2）病毒和pH1N1流感病毒間的基因組片段重組而成的新病毒。These viruses are considered reassortant viruses between a swine-origin influenza A (H3N2) virus circulating in North American swine and a pH1N1 virus. 在2011年，已經從四個州通報：賓夕法尼亞州（3例），緬因州（2例），印第安納州（2例），愛荷華州（3例）感染A型S - OtrH3N2流感病毒的所有人類病例均帶有豬流感A型（pH1N1）的基質蛋白（matrix M）基因組片斷。All cases of human infection with S-OtrH3N2 virus containing the M gene from the pH1N1 virus have occurred in 2011 and have been reported from four states: Pennsylvania (three cases), Maine (two), Indiana (two), and Iowa (three) (3).


資料來源：http://www.cdc.gov/mmwr/PDF/wk/mm60d1123.pdf?source=govdelivery