House flies (Musca domestica) as possible vectors of Campylobacter fetus subsp. jejuni

Area of Science:

• Veterinary Microbiology
• Food Safety
• Epidemiology

Background:

• Campylobacter infections pose a significant public health risk.
• Understanding transmission routes is crucial for preventing human illness.
• House flies are ubiquitous and interact with various environments, including farms.

Purpose of the Study:

• To investigate the prevalence of Campylobacter fetus subsp. jejuni in house flies.
• To determine the role of house flies in the epidemiology of Campylobacter infections.
• To assess potential transmission pathways from animals to humans via flies.

Main Methods:

• Isolation and identification of Campylobacter strains from house flies (Musca domestica).
• Quantification of carrier rates in flies collected from a chicken farm and a piggery.
• Analysis of the relative prevalence of different Campylobacter species and resistant strains.

Main Results:

• A total of 161 Campylobacter fetus subsp. jejuni strains were isolated.
• Carrier rates were 50.7% in flies from a chicken farm and 43.2% from a piggery.
• Campylobacter coli (90.1%) was most prevalent, followed by C. jejuni (6.2%) and resistant thermophilic campylobacters (3.7%).

Conclusions:

• House flies harbor significant levels of Campylobacter, indicating a potential role as vectors.
• Flies may act as a bridge, transmitting Campylobacter from animal reservoirs to food sources for humans.
• This highlights the importance of fly control in farm biosecurity and food safety.