Review of an Influenza Surveillance System, Beijing, People’s Republic of China

Abstract

This system enabled detection of the onset and peak of an epidemic.

Rapid Detection of Respiratory Tract Viral Infections and Coinfections in Patients with Influenza-Like Illnesses by Use of Reverse Transcription-PCR DNA Microarray Systems

“…These studies reported levels of positive influenza A virus seasonal strain detection ranging from 25% in Peru to 40% in Greece (18,22). Our level of influenza A virus detection (33.1%) appears to be in agreement with previous published worldwide studies (17,22,30,41,42 Interestingly, the combination of two RT-PCR DNA microarray systems allowed us to detect not only influenza A virus strains but also 17 other common or newly discovered respiratory viruses in the same sample. This approach demonstrated that HRV and PIV were important causes of ILI, with 25 and 10.5% prevalence, respectively (Fig.…”

“…1). Numerous previous studies detected the presence of influenza viruses in the respiratory tracts of ILI patients by use of real-time RT-PCR systems during 2007 to 2008 (18,30,41,42). These studies reported levels of positive influenza A virus seasonal strain detection ranging from 25% in Peru to 40% in Greece (18,22).…”

Severe, critical and fatal cases of 2009 H1N1 influenza in China

“…In Beijing, we established a comprehensive surveillance system with fifty five collaborating laboratories covering all 17 ), and those variables with P < 0.1 in univariate analysis were included in multivariate analysis. OR, odd ratio; CI, confidence interval; NA: not available (logistic regression could not be performed because of data distribution or small sample size); ICU, intensive care unit.…”

Capacity of the national influenza surveillance system in Afghanistan, a chronic conflict setting

“…This positivity rate is much lower than that reported from neighbouring and Asian countries like Pakistan (24%), China (30%), Bangladesh (10%), and Jordan (9%) (14)(15)(16)(17), which have similar sentinel surveillance systems, and may suggest some underestimation. Nonetheless, it should be noted that after more than 3 decades of war and conflict, the system was able to detect and respond successfully to the novel influenza virus circulating during the influenza A (H1N1) pandemic in 2009.…”