Tuesday , December 1 2020

People can smell dogs if they have malaria



– People with malaria parasites produce special odors on the skin. To detect these odors, we found that dogs with a delicate sense of smell could be trained. Steven Lindsay in the Biosciences Division of the University of Durham, UK, and the main investigator behind a new study on malaria also apply to clothing used by infected persons.

He recently presented his findings at the annual meeting of the American Society of Tropical Medicine and Hygiene.

Sniffed socks

Hundreds of Gambia school children participated in the new survey. They were first tested for malaria parasites after passing a general health check. After that there is a pair of socks to use during the night. The next day, the researchers collected socks and the child divided the condition of the malaria infection. For malaria-digested children, they gathered socks without the symptoms and socks of fresh children. The socks were sent to England. They were frozen here while their sniffing dogs were being trained.

The sniffing test was about to separate the stockings for malaria saturated and healthy children. Each pair of socks are sniffed and if they think they have found malaria mites, they freeze. If they don't smell anything, they should go on.

The result of the test showed that dogs determined the percentages of malaria-digested children's socks at 70 percent and 90 percent of healthy ones.

Malaria parasites mutations

Researchers say that the impact is impressive and that dogs can identify the socks of children with a lower infection than those required by the World Health Organization (WHO) rapid tests.

In general, malaria is diagnosed using blood samples and microscopy. It can be time consuming and requires special skills. You can also use fast blood tests, but they are quite expensive. They have a high degree of accuracy.

The researchers knew it was supposed to be. proof of conceptStudy to show that malaria can be diagnosed by dogs. They also believe that the accuracy of sniffing dogs can be as good as blood tests. Lindsey justifies this because the malaria parasites on children are not always of the same type as they pass through different stages of the disease. The scent that they create on human skin then changes.

Malaria parasites have changed, and the tests used today may be short. Therefore, parasites may not have the specific protein required to demonstrate infection for clinical tests.

Furthermore, researchers believe that the ability of sniffing dogs to detect certain odor-related odors can be a source of inspiration for the development of developing and artificial electronic noses that can smell diseases.

Malaria protects dogs on the border

Lindsey believes that sniffing dogs can be useful when they want to control villages for malaria-carriers without visible signs of health authorities. As a carrier, you can transfer malaria parasites to local mosquitoes. The only way to prevent it from spreading today is to test or treat everyone in a village.

Researchers behind the research, therefore, believe that sniffing dogs will work well in border crossings, countries where malaria is almost eliminated. On the island of Zanzibar, the island of East Africa, Lindsey says that the eradication of malaria parasites is becoming more difficult due to a steady stream of migrants.

Very few correct

Gunnar Hasle is an expert in communicable diseases and operates the Reiseklinikken in Oslo. He says the 70% forward hit rate is too low.

Edilemez This means that the method is useless for finding out if an ardent person has malaria because it is unacceptable to accept errors as 30 percent.

He also points to 90 per cent of healthy people, and states that 10 per cent have received an incorrect message about malaria.

Or The method is an unacceptably high number if used to smell a large number of healthy people, “he says.

Clinic blood test, dogs at the border

Hasle also says that smell indicators have been used for hundreds of years. Among other things, it is possible to succeed in diabetes, breathe the acetone smell or the nail polish remover. Moreover, it is possible to smell the liver failure, because the soul has a sweet smell.

Hasle, referring to a study conducted in 2012, said: “At the same time, the dog was trying to diagnose lung cancer. The result was the same as the malaria experiment.

He believes that it is completely impossible to use dogs to diagnose clinics and that it will be difficult to raise enough dogs to meet this need.

– Any health unit in the tropics should be able to reach a diagnosis of malaria. Afterwards, it is much easier to take quick tests that you can use after minimal training rather than getting trained dogs.

Nevertheless, he believes that in some cases he can be helpful and supports researchers' idea of ​​using sly dogs as malaria guards.

"Sniff dogs can be used for bulk screening of migration into a region freed from malaria."


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