Washington - Scientists used an iPhone and a camera lens to
diagnose intestinal worms in rural Tanzania, a breakthrough that could help
doctors treat patients infected with the parasites, a study said on Tuesday.
Research published by the American Journal of Tropical
Medicine and Hygiene showed that it is possible to fashion a low-cost field
microscope using an iPhone, double-sided tape, a flashlight, ordinary
laboratory slides and an $8 camera lens.
The researchers used their cobbled-together microscope to
successfully determine the presence of eggs from hookworm and other parasites
in the stool of infected children.
"There's been a lot of tinkering in the lab with mobile
phone microscopes, but this is the first time the technology has been used in
the field to diagnose intestinal parasites," said Isaac Bogoch, a
physician specialising in infectious diseases at Toronto General Hospital and
the lead author on the study.
Intestinal worms infect two billion people around the world,
mainly children, sometimes causing malnutrition. The malady can be difficult to
diagnose, in part because of the high cost of a conventional microscope, which
is priced at around $200.
Sensitive
Scientists used the cellphone microscopes to evaluate some
200 stool samples from rural children infected with intestinal worms, and
compared the results against findings obtained using a conventional microscope.
They found overall that the iPhone microscope was able to
detect the presence of eggs deposited by worms in about 70% of the infected
samples.
Although not as sensitive as the conventional device, the
iPhone microscope can be made much more sensitive with refinements, Bogoch
said.
"We think cellphone microscopes could soon become a
valuable diagnostic tool in poor, remote regions where intestinal worms are a
serious health problem, particularly in children," he said.
The researchers also pointed out that almost all medical
staff already possess a cellphone, so the cost for a microscope cobbled
together using a mobile device is deemed negligible compared to the cost for a
conventional one.
Intestinal worms such as hookworms and roundworms, also
known as soil-transmitted helminths, are particularly problematic in young
children, hindering their physical and mental development by causing chronic
anaemia and malnutrition.
If quickly diagnosed, however, the negative health impact of
the parasites can be greatly reduced.
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