Swine Influenza Surveillance in the Southeast Asia

2014 ◽  
Vol 9 (5) ◽  
pp. 839-841
Author(s):  
Takehiko Saito ◽  
◽  
Nobuhiro Takemae ◽  
Haruka Abe ◽  
Yuko Uchida ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Influenza Virus ◽  
Southeast Asia ◽  
Swine Influenza Virus ◽  
Swine Influenza ◽  
Influenza Surveillance ◽  
Nasal Swabs ◽  
Pig Farms

We have been studying the swine influenza virus (SIV) in Thailand since 2005, followed by a study in Vietnam starting in 2010. We actively survey pig farms in both countries to isolate viruses, collecting nasal swabs mainly from clinically healthy pigs. Our results demonstrate the genetic diversity of the SIV in both countries and help fill gaps in knowledge in global molecular SIV epidemiology.

Field study on swine influenza virus (SIV) infection in weaner pigs and sows

2014 ◽  
Vol 42 (06) ◽  
pp. 351-359 ◽  
Author(s):  
C. Meiners ◽  
S. Loesken ◽  
S. Doehring ◽  
E. Starick ◽  
S. Pesch ◽  
...  
Keyword(s):  
Influenza Virus ◽  
Field Study ◽  
Swine Influenza Virus ◽  
Swine Influenza ◽  
Reproductive Disorders ◽  
Rt Pcr ◽  
Nasal Swabs ◽  
History Of ◽  
Siv Infection ◽  
Weaner Pigs

SummaryObjective: The aim of this field study was to explore the occurrence of and factors associated with the detection of swine influenza virus (SIV) by RTqPCR in weaner pigs and sows from herds with a history of respiratory or reproductive disorders. Material and methods: The sample set was based on nasal swabs from 823 sows (123 submissions) and 562 weaner pigs (80 submissions). Nasal swab samples were taken and submitted by 51 veterinary practices from all over Germany. Corresponding to the pig density most of the submissions ori ginated from the north-western part of Germany. The nasal swabs were used to detect SIV RNA by real-time RT-PCR (RTqPCR). Subtyping of SIV RNA by conventional RT-PCR and sequencing was attempted directly from clinical samples or from isolates when available. The herd characteristics, management and housing conditions of the pig herd as well as the course of the disease were collected by a telephone questionnaire with the herd attending veterinarian. Results: SIV was detected by RTqPCR in 53.8% of the submissions from weaner pigs with a history of respiratory disease. Moreover SIV was detected in 10.6% of the submissions from sows. The predominant endemic subtype found in nasal swabs from sows and weaner pigs was H1N1 (60.5%) whereas subtypes H1N2 (14.0%) and H3N2 (14.0%) were detected less frequently. In addition, human pandemic H1N1 virus or reassortants thereof were found in 11.5%. Conclusion and clinical relevance: The results underline the significance of a SIV infection in young pigs. A significant lower detection of SIV in weaner pigs was associated with the vaccination of piglets against porcine circovirus type 2 (PCV2), possibly indicating an interaction of SIV and PCV2. Most of the positive samples from sows originated from gilts, whereas only two originated from sows. An association between reproductive disorders and the detection of SIV could not be confirmed.

scholarly journals 212 Biosecurity practices associated with negative farm status for Mycoplasma hyopneumoniae, porcine reproductive and respiratory syndrome virus, and swine influenza virus in farrow-to-finish pig farms

2020 ◽  
Vol 98 (Supplement_3) ◽  
pp. 6-6
Author(s):  
Julia A Calderon Diaz ◽  
Maria Rodrigues da Costa ◽  
Edgar Garcia Manzanilla
Keyword(s):  
Influenza Virus ◽  
Swine Influenza Virus ◽  
Swine Influenza ◽  
Mycoplasma Hyopneumoniae ◽  
Respiratory Syndrome Virus ◽  
Animal Management ◽  
Pig Farms ◽  
Materials Used ◽  
Biosecurity Practices ◽  
Cleaning And Disinfection

Abstract The objective of this study was to identify biosecurity practices associated negative status (-) for Mycoplasma hyopneumoniae (MHYO), porcine reproductive and respiratory syndrome virus (PRRSv), and swine influenza virus (SIV) in pig farms. Biosecurity practices were assessed using the Biocheck.UGentTM questionnaire in 54 Irish farrow-to-finish pig farms. For each farm, a batch of pigs was observed at slaughter and blood samples were collected from 32 randomly selected pigs per farm at exsanguination. Serology analysis was performed using IDEXX ELISA kits and farms were classified with either positive or negative status for each of the respiratory diseases. Data were analysed using univariable logistic regression in PROC GENMOD of SAS v9.4. Results are presented as odds ratios (OR) and their associated 95% confidence interval (CI). Regularly cleaning materials used for disease treatment between litters (OR=8.2, CI=0.97-69.87), cleaning driving boards (OR=5.5, CI=1.07-28.20) and a maximal density of 3 pigs/m2 in the nursery were associated (P< 0.05) with an increased likelihood of MHYO(-). The feeding company meeting special hygienic requirements (OR=3.84, CI=1.14-12.95) and a strict all-in-all-out management in each finishing room (OR=3.84, CI=1.14-12.95) were associated (P< 0.05) with an increased likelihood of PRRSv(-). However, having disinfection baths between each room (OR=0.20, CI=0.06-0.68) and footbaths installed at the entrance of each building (OR=0.15, CI=0.04-0.52) were associated (P< 0.05) with decreased likelihood of PRRSv(-). Only allowing visitors’ access to the farm from a hygiene lock (OR=4.41, CI=1.04-18.71), and minimal piglet handling during lactation were associated with an increased likelihood of SIV(-) (P< 0.05). Results indicate that biosecurity practices regarding cleaning and disinfection and animal management are the most associated with a negative farm status for respiratory disease. It is possible that the biosecurity practices implemented in farms with lower likelihood for negative status were applied in a more ‘reactionary’ than ‘preventive’ manner.

scholarly journals The epidemiology of swine influenza

2021 ◽  
Vol 1 (1) ◽  
Author(s):  
Yin Li ◽  
Ian Robertson
Keyword(s):  
Risk Factors ◽  
Influenza Virus ◽  
Human Population ◽  
Swine Influenza Virus ◽  
Swine Influenza ◽  
Disease Diagnosis ◽  
Economic Losses ◽  
Pig Farms

AbstractGlobally swine influenza is one of the most important diseases of the pig industry, with various subtypes of swine influenza virus co-circulating in the field. Swine influenza can not only cause large economic losses for the pig industry but can also lead to epidemics or pandemics in the human population. We provide an overview of the pathogenic characteristics of the disease, diagnosis, risk factors for the occurrence on pig farms, impact on pigs and humans and methods to control it. This review is designed to promote understanding of the epidemiology of swine influenza which will benefit the control of the disease in both pigs and humans.

scholarly journals Swine influenza virus infection dynamics in two pig farms; results of a longitudinal assessment

2012 ◽  
Vol 43 (1) ◽  
pp. 24 ◽  
Author(s):  
Meritxell Simon-Grifé ◽  
Gerard E Martín-Valls ◽  
María J Vilar ◽  
Núria Busquets ◽  
Mercedes Mora-Salvatierra ◽  
...  
Keyword(s):  
Influenza Virus ◽  
Virus Infection ◽  
Swine Influenza Virus ◽  
Influenza Virus Infection ◽  
Swine Influenza ◽  
Longitudinal Assessment ◽  
Infection Dynamics ◽  
Pig Farms

Swine Influenza Virus and Association with the Porcine Respiratory Disease Complex in Pig Farms in Southern Brazil

2015 ◽  
Vol 63 (3) ◽  
pp. 234-240 ◽  
Author(s):  
C. Schmidt ◽  
S. P. Cibulski ◽  
C. P. Andrade ◽  
T. F. Teixeira ◽  
A. P. M. Varela ◽  
...  
Keyword(s):  
Influenza Virus ◽  
Respiratory Disease ◽  
Swine Influenza Virus ◽  
Swine Influenza ◽  
Southern Brazil ◽  
Disease Complex ◽  
Pig Farms ◽  
Porcine Respiratory Disease Complex ◽  
Porcine Respiratory

scholarly journals A Comparison of Diagnostic Assays for the Detection of Type a Swine Influenza Virus from Nasal Swabs and Lungs

2001 ◽  
Vol 13 (1) ◽  
pp. 36-42 ◽  
Author(s):  
Sabrina L. Swenson ◽  
Lani L. Vincent ◽  
Brandi M. Lute ◽  
Bruce H. Janke ◽  
Kelly F. Lechtenberg ◽  
...  
Keyword(s):  
Influenza Virus ◽  
Swine Influenza Virus ◽  
Swine Influenza ◽  
Type A ◽  
Diagnostic Assays ◽  
Nasal Swabs
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