Avian-Like A (H1N1) Swine Influenza Virus Antibodies among Swine Farm Residents and Pigs in Southern China

Zhou, Han; Cao, Zanxia; Tan, Likai; Fu, Xinliang; Lu, Gang; Qi, Wenbao; Ke, Changwen; Wang, Heng; Sun, Li; Zhang, Guihong

doi:10.7883/yoken.67.184

Cited by 14 publications

(16 citation statements)

References 15 publications

(32 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For example, the first case of FMD subtype A infection in a pig was found in the province in 2013 (OIE, ) and in 2018, a novel coronavirus, swine acute diarrhoea syndrome coronavirus, was identified as the pathogen causing high mortality in four commercial pig farms in the province (Zhou et al, ). There are also a variety of influenza strains circulating in pigs in the province and surveillance data indicates that the gene reassortment among local isolates is far more complicated than that among isolates from other Chinese provinces (Cao et al, ; Liu et al, ; Ninomiya, Takada, Okazaki, Shortridge, & Kida, ; Xie et al, ; Yang et al, ; Zhou et al, ).…”

Section: Introductionmentioning

confidence: 99%

Pig trade networks through live pig markets in Guangdong Province, China

Huang

Shen

et al. 2020

Transbound Emerg Dis

Self Cite

View full text Add to dashboard Cite

This study used social network analysis to investigate the indirect contact network between counties through the movement of live pigs through four wholesale live pig markets in Guangdong Province, China. All 14,118 trade records for January and June 2016 were collected from the markets and the patterns of pig trade in these markets analysed. Maps were developed to show the movement pathways. Evaluating the network between source counties was the primary objective of this study. A 1-mode network was developed. Characteristics of the trading network were explored, and the degree, betweenness and closeness were calculated for each source county.Models were developed to compare the impacts of different disease control strategies on the potential magnitude of an epidemic spreading through this network. The results show that pigs from 151 counties were delivered to the four wholesale live pig markets in January and/or June 2016. More batches (truckloads of pigs sourced from one or more piggeries) were traded in these markets in January (8,001) than in June 2016 (6,117). The pigs were predominantly sourced from counties inside Guangdong Province (90%), along with counties in Hunan, Guangxi, Jiangxi, Fujian and Henan provinces. The major source counties (46 in total) contributed 94% of the total batches during the two-month study period. Pigs were sourced from piggeries located 10 to 1,417 km from the markets. The distribution of the nodes' degrees in both January and June indicates a free-scale network property, and the network in January had a higher clustering coefficient (0.54 vs. 0.39) and a shorter average pathway length (1.91 vs. 2.06) than that in June. The most connected counties of the network were in the central, northern and western regions of Guangdong Province.Compared with randomly removing counties from the network, eliminating counties with higher betweenness, degree or closeness resulted in a greater reduction of the magnitude of a potential epidemic. The findings of this study can be used to inform targeted control interventions for disease spread through this live pig market trade network in south China. K E Y W O R D Sanimal movement, disease control, new intervention strategies, social network, veterinary epidemiology 2 | LI et aL.

show abstract

Section: Introductionmentioning

confidence: 99%

Pig trade networks through live pig markets in Guangdong Province, China

Huang

Shen

et al. 2020

Transbound Emerg Dis

Self Cite

View full text Add to dashboard Cite

show abstract

“…Some studies compared occupational groups, and many of them find differences in seroprevalence between different occupational groups, which are postulated to reflect differences in exposure [31,42,43,49,56,62,67,68,70-73,79,93,96,116,117]. A problem is that influenza infections were rarely measured in the animals to which the study population was exposed at the time of the study, therefore making it difficult to assess the true levels of exposures.…”

Section: Discussionmentioning

confidence: 99%

Weighing serological evidence of human exposure to animal influenza viruses − a literature review

2016

View full text Add to dashboard Cite

Assessing influenza A virus strains circulating in animals and their potential to cross the species barrier and cause human infections is important to improve human influenza surveillance and preparedness. We reviewed studies describing serological evidence of human exposure to animal influenza viruses. Comparing serological data is difficult due to a lack of standardisation in study designs and in laboratory methods used in published reports. Therefore, we designed a scoring system to assess and weigh specificity of obtained serology results in the selected articles. Many studies report reliable evidence of antibodies to swine influenza viruses among persons occupationally exposed to pigs. Most avian influenza studies target H5, H7 and H9 subtypes and most serological evidence of human exposure to avian influenza viruses is reported for these subtypes. Avian influenza studies receiving a low grade in this review often reported higher seroprevalences in humans compared with studies with a high grade. Official surveillance systems mainly focus on avian H5 and H7 viruses. Swine influenza viruses and avian subtypes other than H5 and H7 (emphasising H9) should be additionally included in official surveillance systems. Surveillance efforts should also be directed towards understudied geographical areas, such as Africa and South America.

show abstract

“…Another interspecies transmission of avian-like H1N1 virus in southern China was observed when 219 swine and 61 swine farm workers were identified to be infected with avian-like H1N1 swine influenza virus between March 2011 and March 2013 [99]. Further a zoonotic transmission of H9N2 virus was identified at a Shandong based swine farm during May 2013-April 2014 when H9N2 virus antibodies were detected in 84 swine and four farm workers.…”

Section: Chinamentioning

confidence: 98%

A Systematic Review Analyzing the Prevalence and Circulation of Influenza Viruses in Swine Population Worldwide

Chauhan

Gordon

2020

Pathogens

View full text Add to dashboard Cite

The global anxiety and a significant threat to public health due to the current COVID-19 pandemic reiterate the need for active surveillance for the zoonotic virus diseases of pandemic potential. Influenza virus due to its wide host range and zoonotic potential poses such a significant threat to public health. Swine serve as a "mixing vessel" for influenza virus reassortment and evolution which as a result may facilitate the emergence of new strains or subtypes of zoonotic potential. In this context, the currently available scientific data hold a high significance to unravel influenza virus epidemiology and evolution. With this objective, the current systematic review summarizes the original research articles and case reports of all the four types of influenza viruses reported in swine populations worldwide. A total of 281 articles were found eligible through screening of PubMed and Google Scholar databases and hence were included in this systematic review. The highest number of research articles (n = 107) were reported from Asia, followed by Americas (n = 97), Europe (n = 55), Africa (n = 18),

show abstract

Avian-Like A (H1N1) Swine Influenza Virus Antibodies among Swine Farm Residents and Pigs in Southern China

Cited by 14 publications

References 15 publications

Pig trade networks through live pig markets in Guangdong Province, China

Pig trade networks through live pig markets in Guangdong Province, China

Weighing serological evidence of human exposure to animal influenza viruses − a literature review

A Systematic Review Analyzing the Prevalence and Circulation of Influenza Viruses in Swine Population Worldwide

Contact Info

Product

Resources

About