Evidence map›Paper›PMID 31063119›Full record

ArticleEpidemiology and infection2019

Estimating within-flock transmission rate parameter for H5N2 highly pathogenic avian influenza virus in Minnesota turkey flocks during the 2015 epizootic.

A Ssematimba, S Malladi, T J Hagenaars, P J Bonney, J T Weaver, K A Patyk, E Spackman, D A Halvorson, C J Cardona

Abstract read
In one paragraph

Article in Epidemiology and infection, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
10citing papers in PubMed, 1 pooled it
–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

10 citing papers in PubMed, 1 synthesis or guideline pooled it.

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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

9 authors.

A SsematimbaSecure Food Systems Team,College of Veterinary Medicine,University of Minnesota,1971 Commonwealth Avenue,Saint Paul,MN 55108,USA.ORCID 0000-0002-5407-2478
S MalladiSecure Food Systems Team,College of Veterinary Medicine,University of Minnesota,1971 Commonwealth Avenue,Saint Paul,MN 55108,USA.
T J HagenaarsDepartment of Bacteriology and Epidemiology,Wageningen Bioveterinary Research,P.O. Box 65,8200AB Lelystad,The Netherlands.
P J BonneySecure Food Systems Team,College of Veterinary Medicine,University of Minnesota,1971 Commonwealth Avenue,Saint Paul,MN 55108,USA.
J T WeaverUnited States Department of Agriculture,Animal and Plant Health Inspection Service, Veterinary Services, Science, Technology, and Analysis Services, Center for Epidemiology and Animal Health, Natural Resources Research Center,Bldg. B MS-2W4, 2150 Centre Avenue, Fort Collins, CO 80526,USA.
K A PatykUnited States Department of Agriculture,Animal and Plant Health Inspection Service, Veterinary Services, Science, Technology, and Analysis Services, Center for Epidemiology and Animal Health, Natural Resources Research Center,Bldg. B MS-2W4, 2150 Centre Avenue, Fort Collins, CO 80526,USA.
E SpackmanExotic and Emerging Avian Viral Diseases Unit,US National Poultry Research Center,USDA-ARS,934 College Station Rd. Athens,GA 30605,USA.
D A HalvorsonSecure Food Systems Team,College of Veterinary Medicine,University of Minnesota,1971 Commonwealth Avenue,Saint Paul,MN 55108,USA.
C J CardonaSecure Food Systems Team,College of Veterinary Medicine,University of Minnesota,1971 Commonwealth Avenue,Saint Paul,MN 55108,USA.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Better control of highly pathogenic avian influenza (HPAI) outbreaks requires deeper understanding of within-flock virus transmission dynamics. For such fatal diseases, daily mortality provides a proxy for disease incidence. We used the daily mortality data collected during the 2015 H5N2 HPAI outbreak in Minnesota turkey flocks to estimate the within-flock transmission rate parameter (β). The number of birds in Susceptible, Exposed, Infectious and Recovered compartments was inferred from the data and used in a generalised linear mixed model (GLMM) to estimate the parameters. Novel here was the correction of these data for normal mortality before use in the fitting process. We also used mortality threshold to determine HPAI-like mortality to improve the accuracy of estimates from the back-calculation approach. The estimated β was 3.2 (95% confidence interval (CI) 2.3-4.3) per day with a basic reproduction number of 12.8 (95% CI 9.2-17.2). Although flock-level estimates varied, the overall estimate was comparable to those from other studies. Sensitivity analyses demonstrated that the estimated β was highly sensitive to the bird-level latent period, emphasizing the need for its precise estimation. In all, for fatal poultry diseases, the back-calculation approach provides a computationally efficient means to obtain reasonable transmission parameter estimates from mortality data.

Indexed as

TurkeysAnimalsDisease OutbreaksInfluenza A Virus, H5N2 SubtypeInfluenza in BirdsMinnesotaPoultry DiseasesAnalysis of dataavian flumathematical modellingveterinary epidemiology

Identifiers

PMID31063119
PMCPMC6518789

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.