The information presented in this update is based on data provided by Ministries of Health and National Influenza Centers of Member States to the Pan American Health Organization (PAHO) or from updates on the Member States’ Ministry of Health web pages.
Regional Update EW 40, 2014
- North America: Influenza activity has remained low in North America. In Canada, ILI activity has been above expected level for the last six weeks but with low influenza detections and high detections of RSV. In the United States, ILI activity has been below the national baseline and influenza A(not subtyped) and influenza B have predominated among the circulating influenza viruses. From mid-August to October 14, 2014, CDC or state public health laboratories have confirmed a total of 691 cases of Enterovirus D68 in 46 states and the District of Columbia. In Mexico, ARI activity is within the endemic channel and the proportions of SARI/ILI consultations among all consultations has been highest in the southern part of the country (Yucatan peninsula). There have been very few influenza detections in the last two weeks in Mexico.
- Caribbean: Influenza activity remained low in the Caribbean, with exception of Puerto Rico and Cuba. In Puerto Rico, ILI activity (as reported to CDC) was high but influenza detections were low and decreasing and in Cuba SARI activity has been elevated for the last four weeks with a predominance of RSV. Among influenza viruses, circulation of influenza A(H3) (Puerto Rico) and B (Dominican Republic, Haiti) was observed. Among CARPHA countries, no influenza viruses were detected.
- Central America: In Central America, influenza B (Costa Rica, Guatemala, Nicaragua) predominated among circulating influenza viruses while some countries had minimal influenza circulation (El Salvador, Honduras). In El Salvador, Honduras and Nicaragua, SARI activity was within the endemic channel, while in Costa Rica, there has been a slightly upward trend in SARI ICU admissions for the last three weeks.
- Andean Region: In the Andean sub-region, respiratory virus and SARI/ARI activity have been low and within expected levels (Colombia, Ecuador, Venezuela). Among circulating influenza viruses, influenza A (H3) predominated in Peru while little influenza virus circulation was seen in Bolivia (La Paz), Colombia, and Ecuador.
- Southern Cone: In the Southern Cone, respiratory virus and SARI/ARI activity have been low and within expected levels (Argentina, Brazil, Chile, Paraguay, Uruguay). Among influenza viruses circulating, influenza B (Chile, Paraguay) and influenza A(H3) have been detected (Uruguay).