OmniVira

Bidirectional Human-Swine Transmission of Seasonal Influenza A(H1N1)pdm09 Virus in Pig Herd, France, 2018.

Amélie Chastagner Vincent Enouf David Peroz Séverine Hervé Pierrick Lucas Stéphane Quéguiner Stéphane Gorin Véronique Beven Sylvie Behillil Philippe Leneveu Emmanuel Garin Yannick Blanchard Sylvie van der Werf Gaëlle Simon
PMID31538914 DOI10.3201/eid2510.190068 Year2019 Journal Emerging infectious diseases Emerg Infect Dis Languageeng Statusppublish

Abstract

In 2018, a veterinarian became sick shortly after swabbing sows exhibiting respiratory syndrome on a farm in France. Epidemiologic data and genetic analyses revealed consecutive human-to-swine and swine-to-human influenza A(H1N1)pdm09 virus transmission, which occurred despite some biosecurity measures. Providing pig industry workers the annual influenza vaccine might reduce transmission risk.

Supporting text Virus Host Location
biosecurity 5 case report 2 farms 31 France 11 H1N1 4 H1N1pdm09 3 human 14 human–swine transmission 1 influenza 61 influenza A(H1N1)pdm09 1 interspecies transmission 51 pandemic 15 respiratory infections 30 reverse zoonosis 38 swine 267 swine–human transmission 1 transmission 55 viruses 117 zoonoses 477 zoonotic disease 19 Influenza A Virus, H1N1 Subtype 74 Animals 1948 Disease Outbreaks 170 Female 289

Evidence records

3 total
Transmission Evidence
3 records · 3 evidence types
Evidence type Spillover Event
1 records
OVE3442 Spillover Event
Key finding

Swine-to-human spillback of influenza A(H1N1)pdm09 virus was identified on the same farm in France.

Virus
Influenza A virus H1N1
Host
human Homo sapiens Natural host pig Sus scrofa Natural host
Location
France
Supporting text

In 2018, a veterinarian became sick shortly after swabbing sows exhibiting respiratory syndrome on a farm in France. Epidemiologic data and genetic analyses revealed consecutive human-to-swine and swine-to-human influenza A(H1N1)pdm09 virus transmission, which occurred despite some biosecurity measures.

Method
epidemiologic data | genetic analysis
Study design
farm-based outbreak investigation and epidemiologic-genetic analysis
Transmission direction
animal-to-human
Geographic raw
France
Country inferred
FRA
Evidence type Outbreak Investigation
1 records
OVE3443 Outbreak Investigation
Key finding

An outbreak investigation in 2018 identified bidirectional human-swine transmission of influenza A(H1N1)pdm09 virus on a farm in France involving a veterinarian and diseased pigs.

Virus
Influenza A virus H1N1
Host
human Homo sapiens Natural host pig Sus scrofa Natural host
Location
France
Supporting text

In 2018, a veterinarian became sick shortly after swabbing sows exhibiting respiratory syndrome on a farm in France. Epidemiologic data and genetic analyses revealed consecutive human-to-swine and swine-to-human influenza A(H1N1)pdm09 virus transmission, which occurred despite some biosecurity measures.

Method
epidemiologic investigation | genetic analyses
Transmission direction
animal-to-human
Geographic raw
France
Country inferred
FRA
Outbreak setting
farm
Outbreak time
2018
Outbreak scale
a veterinarian became sick following swine exposure during farm sampling
Evidence type Cross-species Transmission
1 records
OVE3441 Cross-species Transmission
Key finding

Human-to-swine transmission of influenza A(H1N1)pdm09 virus occurred on a pig farm in France.

Virus
Influenza A virus H1N1
Host
pig Sus scrofa Natural host human Homo sapiens Natural host
Location
France
Supporting text

In 2018, a veterinarian became sick shortly after swabbing sows exhibiting respiratory syndrome on a farm in France. Epidemiologic data and genetic analyses revealed consecutive human-to-swine and swine-to-human influenza A(H1N1)pdm09 virus transmission, which occurred despite some biosecurity measures.

Method
epidemiologic data | genetic analysis
Study design
farm-based outbreak investigation and epidemiologic-genetic analysis
Transmission direction
human-to-animal
Geographic raw
France