Related Experiment Video
Updated: Mar 17, 2026
A Hybrid DNA Extraction Method for the Qualitative and Quantitative Assessment of Bacterial Communities from Poultry Production Samples
Published on: December 10, 2014
High throughput genomic sequencing of bioaerosols in broiler chicken production facilities
Kate M O'Brien1, Michael S Chimenti2, Morgan Farnell3
1Department of Occupational and Environmental Health, University of Iowa, Iowa City, IA, USA.
Abstract:
Chronic inhalation exposure to agricultural dust promotes the development of chronic respiratory diseases among poultry workers. Poultry dust is composed of dander, chicken feed, litter bedding and microbes. However, the microbial composition and abundance has not been fully elucidated. Genomic DNA was extracted from settled dust and personal inhalable dust collected while performing litter sampling or mortality collection tasks. DNA libraries were sequenced using a paired-end sequencing-by-synthesis approach on an Illumina HiSeq 2500. Sequencing data showed that poultry dust is predominantly composed of bacteria (64-67%) with a small quantity of avian, human and feed DNA (< 2% of total reads). Staphylococcus sp. AL1, Salinicoccus carnicancri and Lactobacillus crispatus were the most abundant bacterial species in personal exposure samples of inhalable dust. Settled dust had a moderate relative abundance of these species as well as Staphylococcus lentus and Lactobacillus salivarius. There was a statistical difference between the microbial composition of aerosolized and settled dust. Unlike settled dust composition, aerosolized dust composition had little variance between samples. These data provide an extensive analysis of the microbial composition and relative abundance in personal inhalable poultry dust and settled poultry dust.
Insights
Poultry dust contains mostly bacteria, with specific species like Staphylococcus dominating personal exposure samples. Understanding this microbial makeup is key to addressing respiratory risks for poultry workers.
Area of Science:
- Environmental Microbiology
- Occupational Health
- Genomics
Background:
- Chronic inhalation of agricultural dust is linked to respiratory diseases in poultry workers.
- Poultry dust comprises dander, feed, litter, and microbes, but its microbial composition is not fully understood.
Purpose of the Study:
- To comprehensively analyze the microbial composition and abundance in poultry dust.
- To differentiate microbial profiles between settled and aerosolized dust samples.
Main Methods:
- Genomic DNA extraction from settled and personal inhalable dust samples.
- High-throughput sequencing using Illumina HiSeq 2500.
- Bioinformatic analysis to determine microbial composition and abundance.
Main Results:
- Poultry dust is primarily bacterial (64-67%), with minimal avian, human, or feed DNA (<2%).
- Key bacterial species identified in personal exposure samples include Staphylococcus sp. AL1, Salinicoccus carnicancri, and Lactobacillus crispatus.
- Significant differences in microbial composition exist between aerosolized and settled dust, with aerosolized dust showing less sample-to-sample variance.
Conclusions:
- This study provides an extensive microbial analysis of poultry dust, differentiating between settled and inhaled fractions.
- The identified bacterial species in inhalable dust are crucial for understanding occupational respiratory health risks in poultry farming.
