You religiously vacuum your house to remove all the dust, dirt and bacteria and make sure your indoor air is OK. But new research suggests that some vacuum cleaners may actually make things worse, not better. Certain vacuum cleaners spit fine dust and bacteria back into the air where they can spread the infection and cause allergies. Google Cloud service disruptions missing connadik\'s mother, Virginia Beach shooting protesters interrupted Harris Australian researchers to test 21 vacuum cleaners from 11 manufacturers, including two commercial models. Vacuum cleaners range from less than $100 to nearly $800 between six months and 22. Brands include Dyson, Electrolux, Hoover, iRobot and Sanyo. The researchers measured 62 different air emissions. They release some bacteria, dust and allergens back into the air. The study shows that newer, more expensive vacuums often cause less indoor air pollution than older, cheaper models. High vacuum- Air Efficiency of particles (HEPA) Compared to vacuum cleaners that do not use these special filters, the dust and bacteria content released by the filter is slightly lower. 99 HEPA filters should be removed. 9% of pollen, animal dandruff, and even bacteria in the air. New discoveries have emerged in the field of environmental science and technology. \"The act of vacuum cleaning and vacuuming can both be released and re-created Researchers at Queensland University of Technology in Brisbane, Australia, wrote: \"The suspension of dust and allergens leads to increased exposure . \". Viviana timino, MD, says indoor air cleaning tips from prosthetic limbs, but don\'t throw the vacuum cleaner you trust out so quickly. She is an assistant professor of allergy and immunology at the University of Miami medical school. \"In order for the vacuum to do more harm than good, it has to be a really old vacuum that has never been cleaned,\" she said . \". \"In general, most vacuum cleaners release more dust, dirt and allergens than they do. \"HEPA filters are still the way to go, and they remove more particles than they release back,\" she said. \"There are other things you can do to keep the indoor air clean. \"If you or someone in your family does have an allergy to the room, throw away the carpet,\" she said . \". \"If you throw the carpet, wash it once a week with real hot water. This will kill mites and other allergens. \"The Feather Duster is just rearranging dust in the room. Change to a micro-fiber or static cloth. These won\'t stir up dust, she said. The HEPA filter is still the best, says Jeffrey May. He is the chief scientist at the mayindoor air survey company in tynsboro, Massachusetts. The author of several books including my house is killing me! Family Guide for families with allergies and asthma. \"An abandoned old vacuum cleaner will definitely release more allergens than a new one,\" he said . \". His advice? Buy a vacuum cleaner with a HEPA filter, replace the filter regularly and clean your house. \"Be sure to vacuum under the furniture and behind the furniture,\" Mei said . \". \"You can\'t believe what\'s piled up there, which could be a huge source of allergens. \"David Corey, MD, is not a fan of vacuum cleaners. Corey is a professor and director of the Department of Immunology, allergy and rheumatism immunization at Baylor College of Medicine, Houston, Texas. The only vacuum that makes sense, he says, is the central device. With these, the motor and filtration units are located right outside the house, so all the dust is also filtered out. \"The standard vacuum cleaner will emit some kind of dust, but it is very worrying to know that the old vacuum cleaner will emit more particles,\" he said . \". \"If you stir the carpet by walking through the carpet or vacuuming with a vacuum cleaner, you will atomize these dust, bacteria and spores to make it more likely that you will breathe in something that will cause your symptoms, \"he said. If you have allergies or asthma, replace the carpet with a hard tile, wood or felt floor, he says. \"Use the best vacuum you can use. . . HEPA filters may not be as good as the manufacturer described, but please use them if you have asthma. \"Put your hand down:\" It will do better than traditional filters. \"It is best to continue to clean the room regularly . \" The cleaning of the house is still a way, says Notini. She is vice president of communications and marketing at the home appliance manufacturers association. Notini was unable to review the study, but a press release from the American Chemical Society on the study did not lead her to the conclusion that \"anyone should stop vacuuming. \"It\'s much better to continue vacuuming and cleaning regularly to reduce particles and help improve the overall indoor air quality,\" she told WebMD . \". Comments by Michael W Dennis man Smith, MDSOURCES: LD Knibbs, etc. Environmental Science and Technology. 2011. In press. Dr. Viviana Temino, assistant professor of allergy and immunology at the University of Miami School of Medicine. Professor David Corey Section Chief, Department of Allergy, Immunology and rheumatism; Department of Medicine, Baylor College of Medicine, Houston, Texas. Jeffrey May, chief scientist, is the mayindoor air survey company in tennsboro, Massachusetts. Jill A. Nodini, vice president of communications and marketing, Home Appliance Manufacturers Association.