Evidence map›Paper›PMID 28222764›Full record

ArticleActa veterinaria Scandinavica2017

Occurrence of Salmonella spp.: a comparison between indoor and outdoor housing of broilers and laying hens.

Martin Wierup, Helene Wahlström, Elina Lahti, Helena Eriksson, Désirée S Jansson, Åsa Odelros, Linda Ernholm

Abstract readComparative Study
PubMed Full text at PMC Publisher
In one paragraph

Article in Acta veterinaria Scandinavica, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.

0numbers the graph read from it
0cells of the map it votes in
8citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

8 citing papers in PubMed.

  1. Microorganisms · 2026
    Article
  2. Prevalence and Antimicrobial Susceptibility Profile ofInternational journal of microbiology · 2024
    Article
  3. Article
  4. Article
  5. Article
  6. Article
  7. Article
  8. EFSA journal. European Food Safety Authority · 2019
    Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors.

Martin WierupDepartment of Biomedical Sciences and Veterinary Public Health, Swedish University of Agricultural Sciences, P.O. Box 7028, SE-75007, Uppsala, Sweden. martin.wierup@slu.se.ORCID http://orcid.org/0000-0001-9075-3839
Helene WahlströmDepartment of Disease Control and Epidemiology, National Veterinary Institute, SVA, SE-751 89, Uppsala, Sweden.
Elina LahtiDepartment of Disease Control and Epidemiology, National Veterinary Institute, SVA, SE-751 89, Uppsala, Sweden.
Helena ErikssonDepartment of Animal Health and Antimicrobial Strategies, National Veterinary Institute, SVA, Österåkersvägen 21, SE-81040, Hedesunda, Sweden.
Désirée S JanssonDepartment of Animal Health and Antimicrobial Strategies, National Veterinary Institute, SVA, Österåkersvägen 21, SE-81040, Hedesunda, Sweden.
Åsa OdelrosÅsa Odelros AB, Österåkersvägen 21, SE-81040, Hedesunda, Sweden.
Linda ErnholmDepartment of Disease Control and Epidemiology, National Veterinary Institute, SVA, SE-751 89, Uppsala, Sweden.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundOutdoor production of poultry is rapidly increasing, which could be associated with increased risks for exposure to different environmental sources of Salmonella. We report a comparison on the occurrence of Salmonella during 2007-2015 in broilers and laying hens in outdoor and indoor production subjected to the same requirements for the prevention and control of Salmonella as applied in Sweden.

resultsOur results give no indication that, during the period studied, the exposure to Salmonella in outdoor poultry production was higher than in the indoor production. The annual incidence of Salmonella infected flocks in outdoor production remained at a very low and at a similar level as for indoor production. For laying hens the annual proportion of birds in test positive flocks ranged from 0 to 1.3% for indoor production from 0 to 2.0% for outdoor production. For broilers the proportion of Salmonella infected flocks (2013-2015) was 0.16% for indoor, and 0% in outdoor production. The difference was not statistically significant and was further reduced when flocks infected due to vertical transmission or from a hatchery source were excluded. It should, however, be considered that the number of outdoor flocks included in this evaluation is very small and continuous evaluation is needed.

conclusionsNew animal production systems, including those driven by consumer and welfare demands, may be associated with a higher risk for the exposure of potential pathogens to food animals and possibly also subsequent outbreaks of food borne infections. In this study no increase in the risk for exposure of flocks to Salmonella in outdoor poultry production was found. The situation may well change and the possibility of Salmonella contamination in outdoor poultry production requires continuous attention.

Indexed as

Housing, AnimalAnimal HusbandryAnimalsChickensFemaleIncidenceMalePoultry DiseasesRisk FactorsSalmonellaSalmonella Infections, AnimalSwedenBroilerEnvironmental exposureFree-rangeIndoor poultry productionLaying henOutdoor poultry productionSalmonellaWildlife

Identifiers

PMID28222764
PMCPMC5320760

What OpenQuestion holds

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LicenceCC BY
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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.