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Detection of Foodborne Bacterial Pathogens from Individual Filth Flies

Detection of Foodborne Bacterial Pathogens from Individual Filth Flies

Published on: February 13, 2015

A trait-based framework for predicting foodborne pathogen risk from wild birds.

Olivia M Smith^1,2, Elissa M Olimpi³, Nora Navarro-Gonzalez⁴

¹Department of Entomology, University of Georgia, Athens, Georgia, USA.

Ecological Applications : a Publication of the Ecological Society of America

|December 18, 2021

Summary

Wildlife determent from farms is crucial for food safety, but bird species risk is unclear. Research shows traits like habitat and diet predict pathogen prevalence, suggesting insectivorous birds may be a safe choice for conservation and farming.

Keywords:

Campylobacter spp.Salmonella spp.Shiga-toxin producing Escherichia coli feedlot food safety species traits wild birds

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Area of Science:

Ecology
Wildlife Management
Food Safety

Background:

Foodborne illness outbreaks increase pressure on farmers to manage wildlife.
Understanding which bird species pose food safety risks is essential for balancing agricultural needs and conservation.
Current knowledge gaps hinder effective risk assessment and management strategies for wild birds on farms.

Purpose of the Study:

To identify bird traits that mediate food safety risks to agriculture.
To assess the prevalence of foodborne pathogens (Campylobacter, Salmonella, E. coli) in wild bird populations.
To develop a trait-based framework for evaluating wildlife food safety risks.

Main Methods:

Conducted over 11,000 pathogen tests and 1565 bird surveys across 139 bird species in the western US.
Examined 11 bird traits, including habitat associations, movement, foraging strategy, clutch size, and generation length.
Utilized statistical analyses to correlate bird traits with pathogen prevalence and farm field interactions.

Main Results:

Campylobacter spp. was the most prevalent pathogen (8.0%); Salmonella and STEC were rare.
Species associated with cattle feedlots showed higher Campylobacter prevalence and increased likelihood of entering fields.
Canopy-foraging insectivores were less likely to deposit pathogens, suggesting potential for promoting these birds.

Conclusions:

Bird traits related to pathogen exposure, such as habitat and diet, significantly predict pathogen prevalence.
Promoting insectivorous birds may offer a "win-win-win" for conservation, crop production, and food safety.
Separating crop production from livestock farming is recommended to reduce bird-related food safety risks.