Since April 2009, 52 cases of oseltamivir resistance have been found in the United States, including 2 new cases during the last week.
This week, VRDL identified four new cases of oseltamivir resistance in a Santa Clara County hospital (the four cases were identified by the hospital over a one month period); the test results were confirmed by CDC. A total of nine cases of oseltamivir resistance have been identified in California residents with laboratory-confirmed 2009 H1N1 influenza infections. VRDL continues intensified testing for antiviral resistance to monitor for changing resistance patterns.
5% of specimens received by the Respiratory Laboratory Network were positive for influenza A. This is a decrease from 9% in the previous week. 2009 H1N1 influenza remains the predominant strain circulating in California.
There have been 8,437 hospitalizations and/or fatalities, with 1,746 cases requiring intensive care, reported to date since the beginning of the pandemic.
The statewide cumulative incidence rate of reported 2009 H1N1 influenza hospitalizations and/or fatalities is 21.8 per 100,000 population.
A total of 2,954 hospitalized and/or fatal 2009 H1N1 influenza cases in pediatric patients 18 years or younger, including 48 deaths, have been reported to CDPH to date.
During Week 1 (January 3-9, 2010), 5% of specimens received by the Respiratory Laboratory Network were positive for influenza A. This is a decrease from 9% in the previous week. 2009 H1N1 influenza remains the predominant strain circulating in California.
Influenza detections at sentinel laboratories/Respiratory Laboratory Network (RLN), 2005-2010
RSV detections at sentinel laboratories/Respiratory Laboratory Network (RLN), 2005-2010.
http://www.cdph.ca.gov/programs/vrdl/Documents/FluUpdate01.09.10.pd
This week, VRDL identified four new cases of oseltamivir resistance in a Santa Clara County hospital (the four cases were identified by the hospital over a one month period); the test results were confirmed by CDC. A total of nine cases of oseltamivir resistance have been identified in California residents with laboratory-confirmed 2009 H1N1 influenza infections. VRDL continues intensified testing for antiviral resistance to monitor for changing resistance patterns.
5% of specimens received by the Respiratory Laboratory Network were positive for influenza A. This is a decrease from 9% in the previous week. 2009 H1N1 influenza remains the predominant strain circulating in California.
There have been 8,437 hospitalizations and/or fatalities, with 1,746 cases requiring intensive care, reported to date since the beginning of the pandemic.
The statewide cumulative incidence rate of reported 2009 H1N1 influenza hospitalizations and/or fatalities is 21.8 per 100,000 population.
A total of 2,954 hospitalized and/or fatal 2009 H1N1 influenza cases in pediatric patients 18 years or younger, including 48 deaths, have been reported to CDPH to date.
During Week 1 (January 3-9, 2010), 5% of specimens received by the Respiratory Laboratory Network were positive for influenza A. This is a decrease from 9% in the previous week. 2009 H1N1 influenza remains the predominant strain circulating in California.
Influenza detections at sentinel laboratories/Respiratory Laboratory Network (RLN), 2005-2010
RSV detections at sentinel laboratories/Respiratory Laboratory Network (RLN), 2005-2010.
http://www.cdph.ca.gov/programs/vrdl/Documents/FluUpdate01.09.10.pd