New Study Explores Virus To Fight Superbugs
The advent of highly resistant bacteria or "superbugs" was one of the issues discussed at the Society for General Microbiology's Spring Conference currently being held in Dublin between 26-29 March. An important aspect of the meet was to bring forth new research that focused on combating the advent of superbugs or drug-resistant bacterial strains.
A logic proposed was to use viruses called bacteriophages to wipe out bacterial strains that are resistant to the current crop of antibiotics. The growing menace of accelerated antibiotic resistance has added to the woes of the medical fraternity in combating bacterial diseases that remain resistant to existing antibiotics.
This has reduced the number of potent antibiotics for treating drug-resistant diseases. The novel bacteriophage therapy could be the answer to the growing "superbug" malady. New research has re-investigated the characteristics of bacteriophages as the potential "killer" virus that has the ability to infect drug-resistant bacteria by multiplying within the bacterial cells and breaking them down.
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In the process, the virus itself enhances its own inner mechanism to deal better with other bacterial strains. The bacteriophages are widely present in the environment such as rivers, water, soil, the human body and sewage. The new idea is to tap these viruses.
"Each bacteriophage is highly specific to a certain type of bacteria and needs the right bacterial host cell in order to multiply. The more bacterial targets there are, the quicker they grow by killing the host cells. Therefore it seems very likely that infections harboring high numbers of bacteria will benefit most from bacteriophage therapy - for example chronically infected ears, lungs and wounds," explained Dr. David Harper at the the Dublin meet. He is the Chief Scientific Officer at AmpliPhi Bioscience, Bedfordshire, that has conducted clinical trials on bacteriophages since 2005.
"For these types of infection, only a tiny dose of the virus is needed - as small as one thousandth of a millionth of a gram. This can usually be administered directly to the site of infection in a spray, drops or a cream. The major advantage to bacteriophages is that they don't infect human cells so seem likely to be very safe to use," Harper added.
Bacteriophages, discovered initially in 1915, were seen as mere anti-bacterial therapeutic agents but a lack of understanding on their mode of action failed to pave the way for future investigations as anti-bacterial agents. With the advent of new-age chemical variants of anti-bacterial drugs, the viral impact on bacteria remained ignored.
"The rate of new antibiotics coming onto the market does not match the rate of increasing drug-resistance. The need for new approaches to counter such high resistance is both urgent and vital. New approaches will save lives," added Harper.
Harper is positive on the results of clinical trials and said that once regulatory issues are taken care of and enough funds are generated to secure this area of research on bacteriophages, the development of the novel viral-based antibacterial agents would be a step to curb the prevailing crisis of drug-resistant antibiotics.
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New Study Explores Virus To Fight Superbugs