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Updated: Jul 4, 2026
Detection of Foodborne Bacterial Pathogens from Individual Filth Flies
Published on: February 13, 2015
Unveiling the hidden dangers: enteropathogens carried by flies in Pudong New Area
Chen Lin1,2, Jun Liu1,2, Yongting Yuan1,2
1Pudong New Area Center for Disease Control and Prevention, Shanghai, 200136, China.
Background:
Flies are acknowledged as vectors of diseases transmitted through mechanical means and represent a significant risk to human health. The study aimed to determine the prevalence of enteropathogens carried by flies in Pudong New Area to inform strategies for preventing and controlling flies.
Methods:
Samples were collected from various locations in the area using cage trapping techniques between April and November 2021, encompassing various habitats such as parks, residential areas, restaurants, and farmers' markets. The main fly species were identified using cryomicrography and taxonomic enumeration, with 20 samples per tube collected from different habitats. Twenty-five enteropathogens were screened using GI_Trial v3 TaqManTM microbial arrays.
Results:
A total of 3,875 flies were collected from 6,400 placements, resulting in an average fly density of 0.61 flies per cage. M. domestica were the most common species at 39.85%, followed by L. sericata at 16.57% and B. peregrina at 13.14%. Out of 189 samples, 93 tested positive for enteropathogens, with nine different pathogens being found. 12.70% of samples exclusively had parasites, a higher percentage than those with only bacteria or viruses. The study found that M. domestica had fewer enteropathogens than L. sericata and B. peregrina, which primarily harbored B. hominis instead of bacteria and viruses such as E. coli, Astrovirus, and Sapovirus. During spring testing, all three fly species exhibited low rates of detecting enteropathogens. M. domestica were found in residential areas with the highest number of pathogen species, totaling six. In contrast, L. sericata and B. peregrina were identified in farmers' markets with the highest number of pathogen species, totaling six and seven, respectively.
Conclusions:
Flies have the potential to serve as vectors for the transmission of enteropathogens, thereby posing a substantial risk to public health.
Insights
Flies carry dangerous enteropathogens, posing a public health risk. This study identified nine pathogens in flies from Pudong New Area, highlighting the need for fly control to prevent disease transmission.
Area of Science:
- Medical Entomology
- Public Health
- Microbiology
Background:
- Flies are mechanical vectors for disease transmission, posing significant public health risks.
- Understanding fly-borne pathogen prevalence is crucial for effective control strategies.
Purpose of the Study:
- To determine the prevalence of enteropathogens carried by flies in Pudong New Area.
- To inform public health strategies for fly prevention and control.
Main Methods:
- Fly samples were collected from diverse habitats in Pudong New Area between April and November 2021.
- Fly species were identified using cryomicrography and taxonomic enumeration.
- Enteropathogen screening was performed on 189 fly samples using GI_Trial v3 TaqMan microbial arrays, testing for 25 pathogens.
Main Results:
- A total of 3,875 flies were collected; Musca domestica (39.85%) was the most common species.
- 93 out of 189 samples tested positive for nine different enteropathogens, with parasites being more prevalent than bacteria or viruses alone.
- Specific fly species showed varied pathogen carriage; Musca domestica had fewer pathogens than Lucilia sericata and Chrysomya p. peregrina, which harbored Blastocystis hominis.
Conclusions:
- Flies serve as potential vectors for enteropathogen transmission, presenting a substantial public health threat.
- The findings underscore the importance of integrated fly control measures in urban environments to mitigate disease transmission risks.
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