Secret Site Map
Friday, September 19, 2014

Home News UF Discovers House Flies Carrying Five New Illness-Causing Bacteria

UF Discovers House Flies Carrying Five New Illness-Causing Bacteria

Flies

Researchers with UF’s Institute of Food and Agricultural Sciences have documented five more bacteria species carried by house flies, and all of them cause illness in humans, ranging from food poisoning to respiratory infections.

| September 28, 2010

GAINESVILLE, Fla. — Everyone knows that house flies aren’t welcome around food. But University of Florida scientists have discovered five new reasons why.

Researchers with UF’s Institute of Food and Agricultural Sciences have documented five more bacteria species carried by house flies, and all of them cause illness in humans, ranging from food poisoning to respiratory infections.

In the current issue of Florida Entomologist, the researchers describe collecting house flies near rear entrances and trash bins at four restaurants in Gainesville. About 20 flies from each location were collected in sterile containers and returned to the campus laboratory.

The team used fatty acid analysis and DNA sequencing to identify a total of 11 pathogens carried by the flies – five of them not previously linked to house flies: Acinetobacter baumanni, Bacillus pumilus, Cronobacter sakazakii, Methylobacterium persicinum and Staphylococcus sciuri.

The findings reinforce the notion that fly control is key, especially around food sources, said UF’s Jerry Butler, a retired entomology professor who led the research team.

“People need to know that there’s a reason for health requirements in restaurants,” he said. “Most people have a good immune response, but there are those who are susceptible.” They include infants, seniors and people whose immune systems are compromised by illness or chemotherapy.

Fly control is a day-to-day battle because the insects are so mobile, traveling up to 10 miles in just a couple days’ time, Butler said.

Until this study, house flies were known to carry some 200 bacteria. But both Butler and researcher Jim Maruniak, a UF associate professor of insect pathology, said they expect additional research would turn up even more.

“It just shows you don’t need a lot of flies to contaminate food sources,” Maruniak said.

In addition to the 11 bacteria documented in the study, there were five others that could not be positively identified, researchers said.

House flies’ feeding preferences are particularly troublesome for humans because the insects are attracted to decaying plant and animal matter – materials often found in garbage and animal waste.

“If it smells good to them, we probably want to hide it,” Butler said.

House flies must liquefy food before ingesting it, by placing spongy mouthparts on the food source and secreting saliva or regurgitated gut contents onto it.

The pathogens that can hurt humans are spread by flies through the food-liquefying process, or by defecation.

Pest control company Orkin funded the study. Alejandra Garcia-Maruniak, a UF senior biological scientist, and Frank Meek of Orkin completed the research team.

Meek, the company’s international technical and training director, said his company wanted updated research to stress the importance of fly control in restaurants and kitchens.

“Most people simply wave a fly away and go back to eating, but a cockroach crawling across the table elicits a very different reaction in a restaurant,” Meek said. “However, our research shows that the housefly carries potentially twice as many pathogens as a cockroach. We think it’s important to educate our customers and the public about the health risks pests can pose.”

 

Top news

Patented Portable Heat Injector System Introduced

The new heating system was created with significant input from pest control companies.

Terminix-Triad Adopts New Approach to Employee Recruitment

The company is using social media to attract potential employees and working with community colleges to raise awareness of pest control as a possible career path for students.

Stoy Hedges Establishes Consulting Firm

After 25 years at Terminix, Hedges said it was time for a change in his career.

NPMA's Diversity Committee Launches Survey

The results of this survey will be used to develop tools and resources to help you navigate a continually changing environment as you work to attract, involve, and retain diverse talent pools.

Agri-Turf Distributing Names Lon Records CEO

Records is a familiar face in the industry with a career that dates back to the early 1970s.