scholarly journals Clinical Impact of Infection with Pandemic Influenza (H1N1) 2009 Virus in Naïve Nucleus and Multiplier Pig Herds in Norway

2011 ◽  
Vol 2011 ◽  
pp. 1-6 ◽  
Author(s):  
Carl Andreas Grøntvedt ◽  
Chiek Er ◽  
Britt Gjerset ◽  
Anna Germundsson ◽  
Tore Framstad ◽  
...  
Keyword(s):  
Pandemic Influenza ◽  
Age Groups ◽  
Clinical Signs ◽  
Clinical Impact ◽  
Influenza Viruses ◽  
Influenza Outbreak ◽  
Telephone Interviews ◽  
Pandemic Influenza H1n1 ◽  
Veterinary Institute ◽  
Influenza H1n1

The Norwegian pig population has been free from influenza viruses until 2009. The pandemic influenza outbreak during the autumn 2009 provided an opportunity to study the clinical impact of this infection in an entirely naïve pig population. This paper describes the results of a case-control study on the clinical impact of pandemic influenza (H1N1) 2009 infection in the nucleus and multiplier herds in Norway. The infection spread readily and led to seroconversion of 42% of the Norwegian nucleus and multiplier herds within a year. Positive and negative herds were identified based on surveillance data from the Norwegian Veterinary Institute. Telephone interviews were conducted with pig herd owners or managers between November 2010 and January 2011. Pigs with clinical signs were reported from 40% of the case herds with varying morbidity and duration of respiratory disease and reduced reproductive performance. Clinical signs were reported in all age groups.

Pre-symptomatic transmission of pandemic influenza H1N1 2009: investigation of a family cluster, Brazil

2012 ◽  
Vol 141 (4) ◽  
pp. 763-766 ◽  
Author(s):  
F. T. M. FREITAS ◽  
A. P. S. CABRAL ◽  
E. N. C. BARROS ◽  
M. J. O. BURIGO ◽  
R. D. PROCHNOW ◽  
...  
Keyword(s):  
Pandemic Influenza ◽  
Index Case ◽  
Viral Transmission ◽  
Case Patient ◽  
Face To Face ◽  
Telephone Interviews ◽  
Symptomatic Case ◽  
Pandemic Influenza H1n1 ◽  
The Usa ◽  
Influenza H1n1

SUMMARYWe investigated the first cluster of pandemic influenza H1N1 2009 reported in Brazil in May 2009. The index case-patient had travelled from the USA and had contact with 11 relatives before she presented with symptoms. We conducted face-to-face or telephone interviews with the index case-patient and all suspect cases. We found evidence of pre-symptomatic transmission of the virus to four of her contacts. This finding has public health implications because it indicates that viral transmission in communities may not be prevented solely by isolating symptomatic case-patients.

scholarly journals Interim analysis of pandemic influenza (H1N1) 2009 in Australia: surveillance trends, age of infection and effectiveness of seasonal vaccination

2009 ◽  
Vol 14 (31) ◽  
Author(s):  
H Kelly ◽  
K Grant
Keyword(s):  
Influenza Virus ◽  
Pandemic Influenza ◽  
Seasonal Influenza ◽  
Influenza Virus Infection ◽  
H1n1 Influenza ◽  
Sentinel Surveillance ◽  
Influenza Viruses ◽  
Pandemic Influenza H1n1 ◽  
General Practices ◽  
Influenza H1n1

Between May and September each year, influenza sentinel surveillance is conducted in general practices in Melbourne and the state of Victoria in southern Australia. We describe the first 11 weeks of sentinel surveillance in 2009 (weeks 18-28), during which time pandemic influenza (H1N1) 2009 virus became established, and investigate the protective effect of seasonal influenza vaccine against laboratory-confirmed infection caused by the pandemic virus. At the time of reporting, the peak ILI activity in 2009 had been reached and was similar to the peak recorded in 2007 but below the peak of 2003. The proportion of cases positive for any influenza virus increased from 6% in the first week of surveillance (week 18) to 59% by week 28, during which time the proportion of influenza viruses detected as pandemic influenza increased from zero to 95%, with at least 91% of all influenza viruses confirmed as pandemic influenza by the eighth week of surveillance (week 25). The median age of all 223 patients with pandemic influenza for whom age was known was 21 years (range 2-63 years) compared with the median age of 53 patients with seasonal H1N1 influenza in 2007 or 2008 of 23 years (range 1-75 years). There was no evidence of significant protection from seasonal vaccine against pandemic influenza virus infection in any age group.

scholarly journals Pandemic Influenza (H1N1) 2009 Pneumonia: CURB-65 Score for Predicting Severity and Nasopharyngeal Sampling for Diagnosis Are Unreliable

PLoS ONE ◽  
2010 ◽  
Vol 5 (9) ◽  
pp. e12849 ◽  
Author(s):  
Siobhain Mulrennan ◽  
Simone Sara Tempone ◽  
Ivan Thian Wai Ling ◽  
Simon Hedley Williams ◽  
Gek-Choo Gan ◽  
...  
Keyword(s):  
Pandemic Influenza ◽  
Pandemic Influenza H1n1 ◽  
Influenza H1n1

scholarly journals Emerged HA and NA Mutants of the Pandemic Influenza H1N1 Viruses with Increasing Epidemiological Significance in Taipei and Kaohsiung, Taiwan, 2009–10

PLoS ONE ◽  
2012 ◽  
Vol 7 (2) ◽  
pp. e31162 ◽  
Author(s):  
Chuan-Liang Kao ◽  
Ta-Chien Chan ◽  
Chu-Han Tsai ◽  
Kuan-Ying Chu ◽  
Shu-Fang Chuang ◽  
...  
Keyword(s):  
Pandemic Influenza ◽  
Pandemic Influenza H1n1 ◽  
Epidemiological Significance ◽  
Influenza H1n1

scholarly journals Pandemic Influenza (H1N1) 2009 Is Associated with Severe Disease in India

PLoS ONE ◽  
2010 ◽  
Vol 5 (5) ◽  
pp. e10540 ◽  
Author(s):  
Akhilesh C. Mishra ◽  
Mandeep S. Chadha ◽  
Manohar L. Choudhary ◽  
Varsha A. Potdar
Keyword(s):  
Pandemic Influenza ◽  
Severe Disease ◽  
Pandemic Influenza H1n1 ◽  
Influenza H1n1

Pandemic influenza H1N1 2009 in Thailand

2012 ◽  
Vol 1 (1) ◽  
pp. 59 ◽  
Author(s):  
Aronrag Meeyai ◽  
Ben Cooper ◽  
Richard Coker ◽  
Wirichada Pan-ngum ◽  
Pasakorn Akarasewi ◽  
...  
Keyword(s):  
Pandemic Influenza ◽  
Pandemic Influenza H1n1 ◽  
Influenza H1n1

scholarly journals The first wave of pandemic influenza (H1N1) 2009 in Germany: From initiation to acceleration

2010 ◽  
Vol 10 (1) ◽  
Author(s):  
Gabriele Poggensee ◽  
◽  
Andreas Gilsdorf ◽  
Silke Buda ◽  
Tim Eckmanns ◽  
...  
Keyword(s):  
Pandemic Influenza ◽  
Pandemic Influenza H1n1 ◽  
Influenza H1n1
Sign in / Sign up

Export Citation Format

Share Document