Flies as a potential vector of selected alert pathogens in a hospital environment

Area of Science:

• Medical Entomology
• Microbiology
• Public Health

Background:

• Multi-drug resistant pathogens pose a significant global health threat.
• Flies can act as vectors for these dangerous pathogens, particularly in healthcare settings.
• Understanding fly-borne pathogen transmission is vital for infection control.

Purpose of the Study:

• To assess the role of common fly species (Musca domestica, Lucilia sericata, Calliphora vicina) as vectors of alert pathogens in a hospital environment.
• To identify bacterial genera and species found on flies collected from a hospital.
• To evaluate the antibiotic resistance profiles of isolated bacteria.

Main Methods:

• Collection of 100 flies (Musca domestica, Lucilia sericata, Calliphora vicina) from a hospital setting over two summer months.
• Bacterial isolation and identification using standard microbiological techniques.
• Assessment of bacterial infection rates and antibiotic resistance, including screening for extended-spectrum beta-lactamases (ESBLs).

Main Results:

• Various bacterial genera were identified, with Enterococcus faecalis, Escherichia coli, and Moellerella wisconsensis being the most frequent isolates.
• One strain of Proteus mirabilis from Calliphora vicina produced ESBLs.
• The infection rates for Musca domestica, Lucilia sericata, and Calliphora vicina were 0.38%, 0.26%, and 0.20%, respectively.
• No alert pathogens were detected on the flies sampled.

Conclusions:

• Flies collected in this hospital study did not serve as vectors for alert pathogens.
• Continuous monitoring of flies is recommended as a public health measure to prevent potential pathogen transmission, especially in hospitals.
• Further research into fly-borne diseases is warranted to mitigate risks to hospitalized patients.